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Cornelio-Santiago HP, Bodini RB, Mazalli MR, Gonçalves CB, Rodrigues CE, Lopes de Oliveira A. Oil extraction from pequi (Caryocar brasiliensis Camb.) and sacha inchi (Plukenetia huayllabambana sp. Nov.) almonds by pressurized liquid with intermittent purge: The effects of variables on oil yield and composition. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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2
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Belandria V, Aparecida de Oliveira PM, Chartier A, Rabi JA, de Oliveira AL, Bostyn S. Pressurized-fluid extraction of cafestol and kahweol diterpenes from green coffee. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2016.07.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3
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Detection of parathion methyl using a surface plasmon resonance sensor combined with molecularly imprinted films. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.04.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Antioxidant properties of wheat and rye bran extracts obtained by pressurized liquid extraction with different solvents. J Cereal Sci 2015. [DOI: 10.1016/j.jcs.2014.11.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Kwaśniewska K, Gadzała-Kopciuch R, Cendrowski K. Analytical Procedure for the Determination of Zearalenone in Environmental and Biological Samples. Crit Rev Anal Chem 2015; 45:119-30. [DOI: 10.1080/10408347.2014.896731] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Han Z, Ren Y, Zhu J, Cai Z, Chen Y, Luan L, Wu Y. Multianalysis of 35 mycotoxins in traditional Chinese medicines by ultra-high-performance liquid chromatography-tandem mass spectrometry coupled with accelerated solvent extraction. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:8233-8247. [PMID: 22823451 DOI: 10.1021/jf301928r] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A generic procedure, which involved accelerated solvent extraction and homemade cleanup cartridges, has been developed for the extraction and purification of 35 mycotoxins in various traditional Chinese medicine (TCM) matrixes, i.e., rhizomes and roots, seeds, flowers, and grasses and leaves, for subsequent analysis by ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). All target analytes could be simultaneously quantitated in less than 17 min per run, showing narrow symmetrical peaks. The developed method was also successfully applied in routine monitoring programs, which implied a significant reduction of both effort and time, to investigate the contamination of TCMs. Among 60 commercial TCMs analyzed, 50 were positive. The achieved data underpin the practical application of the UHPLC-MS/MS method as a valuable tool for the trace analysis of multiple mycotoxins in TCMs.
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Affiliation(s)
- Zheng Han
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
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7
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Araújo MM, Marchioni E, Villavicencio ALCH, Zhao M, Zimmermann P, El-Khoury E, Bergaentzle M. Pressurized liquid extraction and HPLC quantification of folic acid in fortified wheat flours. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:7629-7633. [PMID: 22827771 DOI: 10.1021/jf3025503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A pressurized liquid extraction (PLE) method using phosphate buffer as solvent was applied for folic acid (FA) extraction from fortified wheat flours and was compared to a standard solid-liquid extraction (SLE) method. Extracted FA was quantified by reverse phase high-performance liquid chromatography (RP-HPLC) hyphenated with a phenyl column and an absorption photometric detector (λ = 280 nm). Detection and quantification limits were 0.12 and 0.4 ng, respectively, corresponding to 0.06 and 0.2 μg g(-1) of analyzed wheat flour. Equivalent FA contents were found by both extraction methods, but a single PLE allowed a total recovery of FA content, whereas at least three successive SLEs were needed to achieve a total recovery of FA. The obtained results indicated that PLE is a rapid and efficient technique for FA extraction from fortified wheat flour.
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Affiliation(s)
- Michel Mozeika Araújo
- Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Centro de Tecnologia das Radiações. Av. Prof. Lineu Prestes 2242, 05508-910 São Paulo, Brazil.
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8
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Stable isotope dilution assay for the accurate determination of mycotoxins in maize by UHPLC-MS/MS. Anal Bioanal Chem 2012; 402:2675-86. [PMID: 22293971 PMCID: PMC3292730 DOI: 10.1007/s00216-012-5757-5] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 01/13/2012] [Accepted: 01/16/2012] [Indexed: 10/25/2022]
Abstract
A fast, easy-to-handle and cost-effective analytical method for 11 mycotoxins currently regulated in maize and other cereal-based food products in Europe was developed and validated for maize. The method is based on two extraction steps using different acidified acetonitrile–water mixtures. Separation is achieved using ultrahigh-performance liquid chromatography (UHPLC) by a linear water–methanol gradient. After electrospray ionisation, tandem mass spectrometric detection is performed in dynamic multiple reaction monitoring mode. Since accurate mass spectrometric quantification is hampered by matrix effects, uniformly [(13)C]-labelled mycotoxins for each of the 11 compounds were added to the sample extracts prior to UHPLC-MS/MS analysis. Method performance parameters were obtained by spiking blank maize samples with mycotoxins before as well as after extraction on six levels in triplicates. The twofold extraction led to total recoveries of the extraction steps between 97% and 111% for all target analytes, including fumonisins. The [(13)C]-labelled internal standards efficiently compensated all matrix effects in electrospray ionisation, leading to apparent recoveries between 88% and 105% with reasonable additional costs. The relative standard deviations of the whole method were between 4% and 11% for all analytes. The trueness of the method was verified by the measurement of several maize test materials with well-characterized concentrations. In conclusion, the developed method is capable of determining all regulated mycotoxins in maize and presuming similar matrix effects and extraction recovery also in other cereal-based foods.
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9
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Application of accelerated solvent extraction in the analysis of organic contaminants, bioactive and nutritional compounds in food and feed. J Chromatogr A 2012; 1237:1-23. [DOI: 10.1016/j.chroma.2012.03.003] [Citation(s) in RCA: 157] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 03/01/2012] [Accepted: 03/01/2012] [Indexed: 01/22/2023]
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10
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Zhang X, Liu W, Logrieco AF, Yang M, Ou-yang Z, Wang X, Guo Q. Determination of zearalenone in traditional Chinese medicinal plants and related products by HPLC–FLD. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 28:885-93. [DOI: 10.1080/19440049.2011.563429] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Xiaofei Zhang
- a Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College , Beijing 100193 , China
- b School of Pharmacy, Jiangsu University , Zhenjiang 212013 , China
| | - Wenkun Liu
- a Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College , Beijing 100193 , China
- c School of Pharmacy, Jiangxi University of Traditional Chinese Medicine , Nanchang 330004 , China
| | - Antonio F. Logrieco
- d Institute of Sciences of Food Production , ISPA-CNR, Via G. Amendola, 122/O, I-70126 Bari, Italy
| | - Meihua Yang
- a Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College , Beijing 100193 , China
| | - Zhen Ou-yang
- b School of Pharmacy, Jiangsu University , Zhenjiang 212013 , China
| | - Xiong Wang
- e Clovertek Technology Group Inc , Beijing 100044 , China
| | - Qi Guo
- e Clovertek Technology Group Inc , Beijing 100044 , China
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11
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Wei C, Zhou H, Zhou J. Ultrasensitively sensing acephate using molecular imprinting techniques on a surface plasmon resonance sensor. Talanta 2010; 83:1422-7. [PMID: 21238731 DOI: 10.1016/j.talanta.2010.11.034] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Revised: 11/11/2010] [Accepted: 11/14/2010] [Indexed: 11/16/2022]
Abstract
An ultrathin molecularly imprinted polymer film was anchored on an Au surface for fabricating a surface plasmon resonance sensor sensitive to acephate by a surface-bound photo-radical initiator. The polymerization in the presence of acephate resulted in a molecular-imprinted matrix for the enhanced binding of acephate. Analysis of the SPR wavenumber changes in the presence of different concentrations of acephate gave a calibration curve that included the ultrasensitive detection of acephate by the imprinted sites in the composite, K(ass) for the association of acephate to the imprinted sites, 7.7×10(12) M(-1). The imprinted ultrathin film revealed impressive selectivity. The selectivity efficiencies for acephate and other structurally related analogues were 1.0 and 0.11-0.37, respectively. Based on a signal to noise ratio of 3, the detection limits were 1.14×10(-13) M for apple sample and 4.29×10(-14) M for cole sample. The method showed good recoveries and precision for the apple and cole samples spiked with acephate solution. This suggests that a combination of SPR sensing with MIP film is a promising alternative method for the detection of organophosphate compounds.
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Affiliation(s)
- Chuanping Wei
- College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong, PR China
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12
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Duca RC, Badea IA, David IG, Delaforge M, Vladescu L. Redox Behavior of Zearalenone in Various Solvents. ANAL LETT 2010. [DOI: 10.1080/00032710903518708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Pérez-Torrado E, Blesa J, Moltó J, Font G. Pressurized liquid extraction followed by liquid chromatography–mass spectrometry for determination of zearalenone in cereal flours. Food Control 2010. [DOI: 10.1016/j.foodcont.2009.06.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Campone L, Piccinelli AL, Aliberti L, Rastrelli L. Application of pressurized liquid extraction in the analysis of aflatoxins B(1), B(2), G(1) and G(2) in nuts. J Sep Sci 2010; 32:3837-44. [PMID: 19842119 DOI: 10.1002/jssc.200900329] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Aflatoxins (AFs) B(1), B(2), G(1) and G(2) were extracted from nuts by using pressurized liquid extraction (PLE) and the PLE extracts were analyzed using HPLC with fluorescence detection using photochemical post-column derivatization without further cleanup procedures. Several extraction parameters such as temperature (25, 40, 60 and 80 degrees C), pressure (500, 1000, 1500 and 2000 psi), solvent extraction mixture (acetone, acetonitrile, ethyl acetate and methanol), number of cycles (1 and 2), use of dispersing agents and cell size (5 and 11 mL) were investigated for their effects on the extraction performance. The results showed 60 degrees C, 1500 psi, acetonitrile, one cycle and a cell size of 5 mL as most favorable PLE operating conditions. The proposed analytical method provides LODs below the maximum levels established by European Union regulations and the recoveries of the four AFs were between 77 and 93% at spiking levels of 4, 2 and 0.5 microg/kg for AFB(1) and AFG(1) and 1, 0.5 and 0.13 microg/kg for AFB(2) and AFG(2). Validation was carried out using certified reference materials. PLE has been applied for the first time to the analysis of AFs in nuts and offers the possibility for fast simple and accurate quantitative determination of studied mycotoxins.
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Affiliation(s)
- Luca Campone
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Salerno, Fisciano (SA), Italy
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15
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Hervás M, López MÁ, Escarpa A. Simplified calibration and analysis on screen-printed disposable platforms for electrochemical magnetic bead-based inmunosensing of zearalenone in baby food samples. Biosens Bioelectron 2010; 25:1755-60. [DOI: 10.1016/j.bios.2009.12.031] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Accepted: 12/21/2009] [Indexed: 10/20/2022]
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16
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Meng K, Wang Y, Yang P, Luo H, Bai Y, Shi P, Yuan T, Ma R, Yao B. Rapid detection and quantification of zearalenone-producing Fusarium species by targeting the zearalenone synthase gene PKS4. Food Control 2010. [DOI: 10.1016/j.foodcont.2009.05.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Hervás M, López MÁ, Escarpa A. Electrochemical immunoassay using magnetic beads for the determination of zearalenone in baby food: An anticipated analytical tool for food safety. Anal Chim Acta 2009; 653:167-72. [DOI: 10.1016/j.aca.2009.09.024] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 09/15/2009] [Accepted: 09/16/2009] [Indexed: 11/25/2022]
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18
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Chun HS, Choi EH, Chang HJ, Choi SW, Eremin SA. A fluorescence polarization immunoassay for the detection of zearalenone in corn. Anal Chim Acta 2009; 639:83-9. [DOI: 10.1016/j.aca.2009.02.048] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Revised: 02/23/2009] [Accepted: 02/25/2009] [Indexed: 11/26/2022]
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19
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Ričanyová J, Gadzała-Kopciuch R, Reiffová K, Buszewski B. Estrogens and Their Analytics by Hyphenated Separation Techniques. Crit Rev Anal Chem 2009. [DOI: 10.1080/10408340802569506] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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de Andrés F, Zougagh M, Castañeda G, Ríos A. Determination of zearalenone and its metabolites in urine samples by liquid chromatography with electrochemical detection using a carbon nanotube-modified electrode. J Chromatogr A 2008; 1212:54-60. [DOI: 10.1016/j.chroma.2008.09.112] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2008] [Revised: 09/25/2008] [Accepted: 09/30/2008] [Indexed: 10/21/2022]
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21
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Evaluation of high-field asymmetric waveform ion mobility spectrometry mass spectrometry for the analysis of the mycotoxin zearalenone. Anal Chim Acta 2008; 627:112-6. [DOI: 10.1016/j.aca.2008.05.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2008] [Revised: 05/16/2008] [Accepted: 05/20/2008] [Indexed: 11/15/2022]
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22
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D’Arco G, Fernández-Franzón M, Font G, Damiani P, Mañes J. Analysis of fumonisins B1, B2 and B3 in corn-based baby food by pressurized liquid extraction and liquid chromatography/tandem mass spectrometry. J Chromatogr A 2008; 1209:188-94. [DOI: 10.1016/j.chroma.2008.09.032] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Revised: 09/02/2008] [Accepted: 09/05/2008] [Indexed: 11/29/2022]
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23
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Kokkonen MK, Jestoi MN. A Multi-compound LC-MS/MS Method for the Screening of Mycotoxins in Grains. FOOD ANAL METHOD 2008. [DOI: 10.1007/s12161-008-9051-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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24
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Krska R, Schubert-Ullrich P, Molinelli A, Sulyok M, MacDonald S, Crews C. Mycotoxin analysis: an update. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2008; 25:152-63. [PMID: 18286405 DOI: 10.1080/02652030701765723] [Citation(s) in RCA: 215] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Mycotoxin contamination of cereals and related products used for feed can cause intoxication, especially in farm animals. Therefore, efficient analytical tools for the qualitative and quantitative analysis of toxic fungal metabolites in feed are required. Current methods usually include an extraction step, a clean-up step to reduce or eliminate unwanted co-extracted matrix components and a separation step with suitably specific detection ability. Quantitative methods of analysis for most mycotoxins use immunoaffinity clean-up with high-performance liquid chromatography (HPLC) separation in combination with UV and/or fluorescence detection. Screening of samples contaminated with mycotoxins is frequently performed by thin layer chromatography (TLC), which yields qualitative or semi-quantitative results. Nowadays, enzyme-linked immunosorbent assays (ELISA) are often used for rapid screening. A number of promising methods, such as fluorescence polarization immunoassays, dipsticks, and even newer methods such as biosensors and non-invasive techniques based on infrared spectroscopy, have shown great potential for mycotoxin analysis. Currently, there is a strong trend towards the use of multi-mycotoxin methods for the simultaneous analysis of several of the important Fusarium mycotoxins, which is best achieved by LC-MS/MS (liquid chromatography with tandem mass spectrometry). This review focuses on recent developments in the determination of mycotoxins with a special emphasis on LC-MS/MS and emerging rapid methods.
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Affiliation(s)
- Rudolf Krska
- Christian Doppler Laboratory for Mycotoxin Research, Center for Analytical Chemistry, Department for Agrobiotechnology (IFA Tulln), University of Natural Resources and Applied Life Sciences Vienna, A-3430 Tulln, Austria.
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25
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Hartmann N, Erbs M, Wettstein FE, Hoerger CC, Schwarzenbach RP, Bucheli TD. Quantification of zearalenone in various solid agroenvironmental samples using D6-zearalenone as the internal standard. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:2926-2932. [PMID: 18412358 DOI: 10.1021/jf8002448] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Because of its pronounced estrogenicity, zearalenone may be of concern not only in the aqueous but also in the terrestrial environment. Therefore, we developed several analytical methods to quantify zearalenone in different solid matrices of agroenvironmental relevance (i.e., plant organs, soil, manure, and sewage sludge). The use of D(6)-zearalenone as the internal standard (IS) was essential to render the analytical method largely matrix-independent because it compensated for target analyte losses during extract treatment and ion suppression during ionization. Soil and sewage sludge samples were extracted with Soxhlet, whereas plant material and manure samples were extracted by liquid solvent extraction at room temperature. Absolute recoveries for zearalenone were 70-104% for plant materials, 105% for soil, 76% for manure, and 30% for sewage sludge. Relative recoveries ranged from 86 to 113% for all matrices, indicating that the IS was capable to largely compensate for losses during analysis. Ion suppression, between 8 and 74%, was in all cases compensated by the IS but influenced the method quantification levels. These were 3.2-26.2 ng/g(dryweightdw) for plant materials, 0.7 ng/g(dw) for soil, 12.3 ng/g(dw) for manure, and 6.8 ng/g(dw) for sewage sludge. Plant material concentrations varied from 86 ng/g(dw) to more than 16.7 microg/g(dw), depending on the organ and crop. Soil concentrations were between not detectable and 7.5 ng/g(dw), depending on the sampling depth. Zearalenone could be quantified in all manure samples in concentrations between 8 and 333 ng/g(dw). Except for two of the 85 investigated sewage sludge samples, zearalenone concentrations were below quantification limit.
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Affiliation(s)
- Niccolo Hartmann
- Agroscope Reckenholz-Tänikon Research Station ART, Reckenholzstrasse 191, CH-8046 Zürich, Switzerland
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Study of the chemical derivatization of zearalenone and its metabolites for gas chromatography–mass spectrometry analysis of environmental samples. J Chromatogr A 2008; 1190:307-15. [DOI: 10.1016/j.chroma.2008.02.115] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2007] [Revised: 02/26/2008] [Accepted: 02/29/2008] [Indexed: 11/21/2022]
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27
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Zougagh M, Ríos A. Supercritical fluid extraction of macrocyclic lactone mycotoxins in maize flour samples for rapid amperometric screening and alternative liquid chromatographic method for confirmation. J Chromatogr A 2007; 1177:50-7. [PMID: 18054947 DOI: 10.1016/j.chroma.2007.11.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2007] [Revised: 11/03/2007] [Accepted: 11/07/2007] [Indexed: 11/30/2022]
Abstract
A rapid and simple method for the direct screening of macrocyclic lactone mycotoxins (zearalenone, ZON; alpha-zearalenol, alpha-ZOL; and beta-zearalenol, beta-ZOL) in maize flour samples is proposed. The sample screening method comprises supercritical fluid extraction (SFE) and clean-up on Florisil adsorption cartridge of the selected toxic compounds, followed by continuous flow electrochemical detection. Those samples for which the total concentration is close to or above the threshold limit established by legislation (0.200 mg kg(-1)) are subjected to preconcentration on C18 chromatographic material and liquid chromatographic separation for confirmation purposes. This confirmation method allows the determination of ZON, alpha-ZOL and beta-ZOL in the range between 30 and 300 microg kg(-1), with a average relative standard deviation lower than 5.2 in all cases.
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Affiliation(s)
- Mohammed Zougagh
- Department of Analytical Chemistry and Food Technology, Faculty of Chemistry, University of Castilla-La Mancha, Av. Camilo José Cela s/n, E-13004 Ciudad Real, Spain
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28
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Mendiola JA, Herrero M, Cifuentes A, Ibañez E. Use of compressed fluids for sample preparation: Food applications. J Chromatogr A 2007; 1152:234-46. [PMID: 17353022 DOI: 10.1016/j.chroma.2007.02.046] [Citation(s) in RCA: 136] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 02/08/2007] [Accepted: 02/15/2007] [Indexed: 10/23/2022]
Abstract
This review attempts to provide an updated overview (including works published till June 2006) on the latest applications of compressed fluids as sample preparation techniques for food analysis. After a general review of the principles of supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE; also called accelerated solvent extraction, ASE or subcritical water extraction, SWE, when water is employed as extraction solvent), the principal applications of such techniques in the mentioned fields of food and natural products are described, discussing their main advantages and drawbacks.
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Affiliation(s)
- José A Mendiola
- Sección Departamental de Ciencias de la Alimentación, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain
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29
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Ridgway K, Lalljie SPD, Smith RM. Sample preparation techniques for the determination of trace residues and contaminants in foods. J Chromatogr A 2007; 1153:36-53. [PMID: 17313955 DOI: 10.1016/j.chroma.2007.01.134] [Citation(s) in RCA: 214] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 01/18/2007] [Accepted: 01/25/2007] [Indexed: 11/30/2022]
Abstract
The determination of trace residues and contaminants in complex matrices, such as food, often requires extensive sample extraction and preparation prior to instrumental analysis. Sample preparation is often the bottleneck in analysis and there is a need to minimise the number of steps to reduce both time and sources of error. There is also a move towards more environmentally friendly techniques, which use less solvent and smaller sample sizes. Smaller sample size becomes important when dealing with real life problems, such as consumer complaints and alleged chemical contamination. Optimal sample preparation can reduce analysis time, sources of error, enhance sensitivity and enable unequivocal identification, confirmation and quantification. This review considers all aspects of sample preparation, covering general extraction techniques, such as Soxhlet and pressurised liquid extraction, microextraction techniques such as liquid phase microextraction (LPME) and more selective techniques, such as solid phase extraction (SPE), solid phase microextraction (SPME) and stir bar sorptive extraction (SBSE). The applicability of each technique in food analysis, particularly for the determination of trace organic contaminants in foods is discussed.
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Affiliation(s)
- Kathy Ridgway
- Safety and Environmental Assurance Centre, Unilever Colworth, Sharnbrook, Bedfordshire, MK44 1LQ, UK.
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30
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Jiang Y, Li P, Li SP, Wang YT, Tu PF. Optimization of pressurized liquid extraction of five major flavanoids from Lysimachia clethroide. J Pharm Biomed Anal 2007; 43:341-5. [PMID: 16935451 DOI: 10.1016/j.jpba.2006.06.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 06/09/2006] [Accepted: 06/12/2006] [Indexed: 10/24/2022]
Abstract
As an alternative of traditional extraction method, pressurized liquid extraction (PLE) was applied for five flavanoids extraction from Lysimachia clethroide. The operational parameters of PLE, such as extraction solvent, temperature, pressure, static extraction time, flush volume and cycles were optimized by univariate approach coupled with central composite design (CCD) in order to obtain the highest extraction efficiency. The optimized result employed 50% acetonitrile aqueous as extraction solvent, 100 degrees C of extraction temperature, 1500 psi of extraction pressure, 25 min of static time, 70% flush volume, and only one cycle to extract the target compounds completely. Finally, the contents of five major flavanoids in L. clethroides from different sources were determined simultaneously by the combination of the presented PLE and HPLC method.
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Affiliation(s)
- Y Jiang
- School of Pharmaceutical Sciences, Health Science Center of Peking University, Beijing, China
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31
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Zöllner P, Mayer-Helm B. Trace mycotoxin analysis in complex biological and food matrices by liquid chromatography–atmospheric pressure ionisation mass spectrometry. J Chromatogr A 2006; 1136:123-69. [PMID: 17087969 DOI: 10.1016/j.chroma.2006.09.055] [Citation(s) in RCA: 217] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Revised: 09/14/2006] [Accepted: 09/19/2006] [Indexed: 10/23/2022]
Abstract
Mycotoxins are toxic secondary metabolites produced by filamentous fungi that are growing on agricultural commodities. Their frequent presence in food and their severe toxic, carcinogenic and estrogenic properties have been recognised as potential threat to human health. A reliable risk assessment of mycotoxin contamination for humans and animals relies basically on their unambiguous identification and accurate quantification in food and feedstuff. While most screening methods for mycotoxins are based on immunoassays, unambiguous analyte confirmation can be easily achieved with mass spectrometric methods, like gas chromatography/mass spectrometry (GC/MS) or liquid chromatography/mass spectrometry (LC/MS). Due to the introduction of atmospheric pressure ionisation (API) techniques in the late 80s, LC/MS has become a routine technique also in food analysis, overcoming the traditional drawbacks of GC/MS regarding volatility and thermal stability. During the last few years, this technical and instrumental progress had also an increasing impact on the expanding field of mycotoxin analysis. The aim of the present review is to give an overview on the application of LC-(API)MS in the analysis of frequently occurring and highly toxic mycotoxins, such as trichothecenes, ochratoxins, zearalenone, fumonisins, aflatoxins, enniatins, moniliformin and several other mycotoxins. This includes also the investigation of some of their metabolites and degradation products. Suitable sample pre-treatment procedures, their applicability for high sample through-put and their influence on matrix effects will be discussed. The review covers literature published until July 2006.
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Affiliation(s)
- Peter Zöllner
- Bayercropscience GmbH, Product Technology, Industriepark Höchst, G836, D-65926 Frankfurt/Main, Germany.
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32
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Urraca JL, Marazuela MD, Moreno-Bondi MC. Molecularly imprinted polymers applied to the clean-up of zearalenone and α-zearalenol from cereal and swine feed sample extracts. Anal Bioanal Chem 2006; 385:1155-61. [PMID: 16628404 DOI: 10.1007/s00216-006-0343-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2005] [Revised: 01/26/2006] [Accepted: 01/27/2006] [Indexed: 10/24/2022]
Abstract
A molecularly imprinted polymer prepared using 1-allylpiperazine (1-ALPP) as the functional monomer, trimethyltrimethacrylate (TRIM) as the crosslinker and the zearalenone (ZON)-mimicking template cyclododecanyl-2,4-dihydroxybenzoate (CDHB) has been applied to the clean-up and preconcentration of this mycotoxin (zearalenone) and a related metabolite, alpha-zearalenol (alpha-ZOL), from cereal and swine feed sample extracts. The extraction of ZON and alpha-ZOL from the food samples was accomplished using pressurized liquid extraction (PLE) with MeOH/ACN (50:50, v/v) as the extraction solvent, at 50 degrees C and 1500 psi. The extracted samples were cleaned up and preconcentrated through the MIP cartridge and analyzed using HPLC with fluorescence detection (lambda (exc)=271/ lambda (em)=452 nm). The stationary phase was a polar endcapped C18 column, and ACN/MeOH/water 10/55/35 (v/v/v, 15 mM ammonium acetate) at a flow rate of 1.0 mL min(-1) was used as the mobile phase. The method was applied to the analysis of ZON and alpha-ZOL in wheat, corn, barley, rye, rice and swine feed samples fortified with 50, 100 and 400 ng g(-1) of both mycotoxins, and it gave recoveries of between 85 and 97% (RSD 2.1-6.7%, n=3) and 87-97% (RSD 2.3-5.6%, n=3) for alpha-ZOL and ZON, respectively. The method was validated using a corn reference material for ZON.
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Affiliation(s)
- Javier L Urraca
- Laboratory of Optical Sensors, Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, 28040, Madrid, Spain
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33
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Urraca JL, Marazuela MD, Merino ER, Orellana G, Moreno-Bondi MC. Molecularly imprinted polymers with a streamlined mimic for zearalenone analysis. J Chromatogr A 2006; 1116:127-34. [PMID: 16595138 DOI: 10.1016/j.chroma.2006.03.032] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2005] [Revised: 03/10/2006] [Accepted: 03/10/2006] [Indexed: 10/24/2022]
Abstract
Molecularly imprinted polymers (MIPs) with selective recognition properties for zearalenone (ZON), an estrogenic mycotoxin, and structurally related compounds have been prepared using the non-covalent imprinting approach. A rationally designed ZON analogue, cyclododecyl 2,4-dihydroxybenzoate (CDHB), that exhibits resemblance to ZON in terms of size, shape and functionality has been synthesized and used as template for MIP preparation instead of the natural toxin. Several functional monomers have been evaluated to maximize the interactions with the template molecule during the polymerization process. The polymer material prepared with 1-allylpiperazine (1-ALPP) as functional monomer, trimethyl trimethacrylate (TRIM) as cross-linker and acetonitrile as porogen (in a 1:4:20 molar ratio) displayed superior binding capacities than any other of the MIPs tested. Selectivity of this material for ZON and structurally related and non-related compounds has been evaluated using it as stationary phase in liquid chromatography. Our results demonstrate that the imprinted polymer shows significant affinity in the porogenic solvent for the template mimic (CDHB) as well as for the ZON and other related target metabolites in food samples, dramatically improving the performance of previously reported MIPs for ZON recognition. Therefore, MIPs can be an excellent alternative for clean-up and preconcentration of the mycotoxin in contaminated food samples.
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Affiliation(s)
- J L Urraca
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, E-28040 Madrid, Spain
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34
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Sforza S, Dall'asta C, Marchelli R. Recent advances in mycotoxin determination in food and feed by hyphenated chromatographic techniques/mass spectrometry. MASS SPECTROMETRY REVIEWS 2006; 25:54-76. [PMID: 15892148 DOI: 10.1002/mas.20052] [Citation(s) in RCA: 138] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Mycotoxins are fungal toxins produced by molds, which occur universally in food and feed derivatives, and are produced under certain environmental conditions in the field before harvest, post-harvest, during storage, processing, and feeding. Mycotoxin contamination is one of the most relevant and worrisome problem concerning food and feed safety because it can cause a variety of toxic acute and chronic effects in human and animals. In this review we report the use of mass spectrometry in connection with chromatographic techniques for mycotoxin determination by considering separately the most diffuse class of mycotoxins: patulin, aflatoxins, ochratoxin A, zearalenone, trichothecenes, and fumonisins. Although the selectivity of mass spectrometry is unchallenged if compared to common GC and LC detection methods, accuracy, precision, and sensitivity may be extremely variable concerning the different mycotoxins, matrices, and instruments. The sensitivity issue may be a real problem in the case of LC/MS, where the response can be very different for the different ionization techniques (ESI, APCI, APPI). Therefore, when other detection methods (such as fluorescence or UV absorbance) can be used for the quantitative determination, LC/MS appears to be only an outstanding confirmatory technique. In contrast, when the toxins are not volatile and do not bear suitable chromophores or fluorophores, LC/MS appears to be the unique method to perform quantitative and qualitative analyses without requiring any derivatization procedure. The problem of exact quantitative determination in GC/MS and LC/MS methods is particularly important for mycotoxin determination in food, given the high variability of the matrices, and can be solved only by the use of isotopically labeled internal standards or by the use of ionization interfaces able to lower matrix effects and ion suppressions. When the problems linked to inconstant ionization and matrix effects will be solved, only MS detectors will allow to simplify more and more the sample preparation procedures and to avoid clean-up procedures, making feasible low-cost, high-throughput determination of mycotoxins in many different food matrices.
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Affiliation(s)
- Stefano Sforza
- Department of Organic and Industrial Chemistry, University of Parma, Parco Area delle Scienze 17/a, I-43100, Parma, Italy
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Carabias-Martínez R, Rodríguez-Gonzalo E, Revilla-Ruiz P, Hernández-Méndez J. Pressurized liquid extraction in the analysis of food and biological samples. J Chromatogr A 2005; 1089:1-17. [PMID: 16130765 DOI: 10.1016/j.chroma.2005.06.072] [Citation(s) in RCA: 230] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Originally, the use of the pressurized liquid extraction technique (PLE) was mainly focused on the extraction of environmental pollutants present in soil matrices, sediments, and sewage sludge. However, more recently the distinct advantages of this technique are being exploited in diverse areas, including biology, and the pharmaceutical and food industries. The aim of the present review is to explore recent analytical applications of this extraction technique (PLE) in the extraction of contaminant compounds and matrix components in food and biological samples, placing special emphasis on the strategies followed to obtain a rapid, selective, efficient and reliable extraction process.
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Affiliation(s)
- R Carabias-Martínez
- Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Química, Universidad de Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain
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36
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Ramírez E, Molina P, Zón M, Fernández H. Development of an Electroanalytical Method for the Quantification of Zearalenone (ZEA) in Maize Samples. ELECTROANAL 2005. [DOI: 10.1002/elan.200403193] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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37
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Cavaliere C, D’Ascenzo G, Foglia P, Pastorini E, Samperi R, Laganà A. Determination of type B trichothecenes and macrocyclic lactone mycotoxins in field contaminated maize. Food Chem 2005. [DOI: 10.1016/j.foodchem.2004.10.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Sforza S, Dall'Asta C, Moseriti A, Galaverna G, Dossena A, Marchelli R. Alternate Isotope-Coded Derivatization Assay: An Isotope Dilution Method Applied to the Quantification of Zearalenone in Maize Flour. Angew Chem Int Ed Engl 2005; 44:5126-30. [PMID: 16013071 DOI: 10.1002/anie.200500148] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Stefano Sforza
- Department of Organic and Industrial Chemistry, University of Parma, Parco Area delle Scienze 17/A, 43100 Parma, Italy.
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39
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Sforza S, Dall'Asta C, Moseriti A, Galaverna G, Dossena A, Marchelli R. Alternate Isotope-Coded Derivatization Assay: An Isotope Dilution Method Applied to the Quantification of Zearalenone in Maize Flour. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200500148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Biselli S, Hummert C. Development of a multicomponent method forFusariumtoxins using LC-MS/MS and its application during a survey for the content of T-2 toxin and deoxynivalenol in various feed and food samples. ACTA ACUST UNITED AC 2005; 22:752-60. [PMID: 16147431 DOI: 10.1080/02652030500158617] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A reliable, sensitive and selective method was developed to determine different Fusarium mycotoxins (trichothecenes Type A and B, zearalenone) simultaneously in cereals and cereal-based samples using liquid chromatography with tandem mass spectrometry (LC-ESI-MS/MS). Sample preparation is based on a standard solvent extraction step followed by two different kinds of solid-phase clean-up procedures: using a multifunctional MycoSep material for trichothecenes and zearalenone. The average recoveries for trichothecenes ranged from 65% for nivalenol (NIV) up to 96% for deoxynivalenol (DON) and 89% for zearalenone (ZON). The limit of quantification varied between 0.02 and 10 ppb for each substance. In addition, a screening survey with 685 samples was carried out to compare contents of T-2 toxin and deoxynivalenol and to investigate potential coherence in contamination pattern.
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Affiliation(s)
- S Biselli
- Eurofins/Wiertz-Eggert-Förissen, Hamburg, Germany.
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41
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Berthiller F, Schuhmacher R, Buttinger G, Krska R. Rapid simultaneous determination of major type A- and B-trichothecenes as well as zearalenone in maize by high performance liquid chromatography-tandem mass spectrometry. J Chromatogr A 2005; 1062:209-16. [PMID: 15679158 DOI: 10.1016/j.chroma.2004.11.011] [Citation(s) in RCA: 224] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A novel method for the simultaneous determination of the Fusarium mycotoxins nivalenol, deoxynivalenol, fusarenon-X, 3-acetyl-deoxynivalenol, the sum of 3-acetyl-deoxynivalenol and 15-acetyl-deoxynivalenol, diacetoxy-scirpenol, HT-2 toxin, T-2 toxin and zearalenone in maize has been developed using gradient RP-LC with atmospheric pressure chemical ionization triple quadrupole mass spectrometry (LC-APCI-MS/MS). Swift clean-up of maize samples was performed with MycoSep #226 columns. Quantification of zearalenone was performed with zearalanone as internal standard (IS), while no IS was used for the trichothecenes. Detection of the mycotoxins was carried out in the multiple reaction monitoring (MRM) mode. Method performance characteristics were estimated after analysis of spiked blank maize samples. Calibration curves were linear between 10 and 1000 microg/kg and the limits of detection ranged from 0.3 to 3.8 microg/kg depending on the mycotoxin. Moreover, the accuracy of the method was confirmed by comparing analytical data to certified values from reference materials for deoxynivalenol and zearalenone.
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Affiliation(s)
- Franz Berthiller
- Christian Doppler Laboratory for Mycotoxin Research, Department IFA-Tulln, University of Natural Resources and Applied Life Sciences, Vienna, Tulln, Austria
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42
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Ferrer I, Thurman EM, Fernández-Alba AR. Quantitation and Accurate Mass Analysis of Pesticides in Vegetables by LC/TOF-MS. Anal Chem 2005; 77:2818-25. [PMID: 15859598 DOI: 10.1021/ac048458x] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A quantitative method consisting of solvent extraction followed by liquid chromatography/time-of-flight mass spectrometry (LC/TOF-MS) analysis was developed for the identification and quantitation of three chloronicotinyl pesticides (imidacloprid, acetamiprid, thiacloprid) commonly used on salad vegetables. Accurate mass measurements within 3 ppm error were obtained for all the pesticides studied in various vegetable matrixes (cucumber, tomato, lettuce, pepper), which allowed an unequivocal identification of the target pesticides. Calibration curves covering 2 orders of magnitude were linear over the concentration range studied, thus showing the quantitative ability of TOF-MS as a monitoring tool for pesticides in vegetables. Matrix effects were also evaluated using matrix-matched standards showing no significant interferences between matrixes and clean extracts. Intraday reproducibility was 2-3% relative standard deviation (RSD) and interday values were 5% RSD. The precision (standard deviation) of the mass measurements was evaluated and it was less than 0.23 mDa between days. Detection limits of the chloronicotinyl insecticides in salad vegetables ranged from 0.002 to 0.01 mg/kg. These concentrations are equal to or better than the EU directives for controlled pesticides in vegetables showing that LC/TOF-MS analysis is a powerful tool for identification of pesticides in vegetables. Robustness and applicability of the method was validated for the analysis of market vegetable samples. Concentrations found in these samples were in the range of 0.02-0.17 mg/kg of vegetable.
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Affiliation(s)
- Imma Ferrer
- Pesticide Residue Research Group, University of Almería, 04120 Almería, Spain.
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43
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Biancardi A, Gasparini M, Dall'Asta C, Marchelli R. A rapid multiresidual determination of type A and type B trichothecenes in wheat flour by HPLC-ESI-MS. ACTA ACUST UNITED AC 2005; 22:251-8. [PMID: 16019793 DOI: 10.1080/02652030500110923] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A new, rapid and sensitive method is reported for the multiresidual determination of type A (diacetoxyscirpenol, HT-2 toxin, T-2 toxin) and type B (nivalenol, deoxynivalenol, fusarenon X, 15-O-acetyl-4-deoxynivalenol) trichothecenes in wheat flour samples. Sample extraction was performed with acetonitrile/water mixtures. Mycosep columns were used for a fast and effective clean-up procedure. The analytes were separated by HPLC with a RP C18 column by means of a gradient elution and detected in an ESI-interfaced single quadrupole mass spectrometer. Type B and type A trichothecenes were monitored in the negative and in the positive ion mode, respectively. The method performance is reported in terms of linearity (r2 = 0.999), specificity, accuracy (recoveries from 70-120%) and precision (CV% = 5), the LOQs are in the range 10-20 microg/Kg.
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Affiliation(s)
- A Biancardi
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna, Brescia, Italy
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44
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Pallaroni L, von Holst C. Development of an extraction method for the determination of zearalenone in corn using less organic solvents. J Chromatogr A 2004; 1055:247-9. [PMID: 15560504 DOI: 10.1016/j.chroma.2004.08.147] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A method for the determination of zearalenone in corn has been developed applying pressurised liquid extraction (PLE) and using environmentally acceptable and less noxious organic solvents. The extracted samples were analysed with liquid chromatography coupled to mass spectrometry (LC-MS) equipped with an electrospray (ESI) ionisation interface. The optimised extraction mixture was isopropanol and an aqueous solution of triethylamine (1%) 50:50 (v/v), which allowed to halve the use of organic solvent compared to the method proposed by ISO. When applying the optimised method to five different naturally contaminated corn samples the obtained concentrations were slightly increased compared to the analysis using the previously used extraction solvent (acetonitrile-methanol). The relative standard deviation (RSD, n = 3) varied between 4 and 10% depending on the concentration level of the target analyte in the test material.
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Affiliation(s)
- Lea Pallaroni
- European Commission, DG Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg, B-2440 Geel, Belgium
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45
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Urraca J, Marazuela M, Moreno-Bondi M. Analysis for zearalenone and α-zearalenol in cereals and swine feed using accelerated solvent extraction and liquid chromatography with fluorescence detection. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2004.03.093] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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46
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Royer D, Humpf HU, Guy PA. Quantitative analysis ofFusariummycotoxins in maize using accelerated solvent extraction before liquid chromatography/atmospheric pressure chemical ionization tandem mass spectrometry. ACTA ACUST UNITED AC 2004; 21:678-92. [PMID: 15370841 DOI: 10.1080/02652030410001711304] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A method for the simultaneous quantitative determination of deoxynivalenol (DON), fumonisin B1 (FB1) and zearalenone (ZEN) in maize by liquid chromatography-atmospheric pressure chemical ionization tandem mass spectrometry (LC-APCIMS/MS), using stable isotopically labelled and structural analogues internal standards, is described. The procedure involves accelerated solvent extraction followed by two solid-phase clean-up steps on strong anion exchange resin and a Mycosep column. Typical recoveries were calculated by spiking blank maize at three different concentrations for deoxynivalenol (200, 400 and 1000 microg kg(-1)) at 70%, for fumonisin B1 (100, 200 and 1000 microg kg(-1)) at 90%, and for zearalenone (50, 100 and 200 microg kg(-1)) at 40%. LC-APCIMS/MS analyses were realized in collision-induced dissociation on an ion-trap instrument to provide a high degree of selectivity and sensitivity. Extraction of ions from two transition reactions, monitored by LC-APCIMS/MS for each analyte, enabled a limit of detection for DON, FB1 and ZEN at, respectively, 10, 20 and 3 microg kg(-1), and a limit of quantification at, respectively, 50, 50 and 10 microg kg(-1). The robustness of the method was also evaluated with the analysis of wheat samples.
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Affiliation(s)
- D Royer
- Nestlé Research Center, Nestec Ltd, Vers-Chez-Les-Blanc, CH-1000 Lausanne 26, Switzerland
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47
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Denery JR, Dragull K, Tang C, Li QX. Pressurized fluid extraction of carotenoids from Haematococcus pluvialis and Dunaliella salina and kavalactones from Piper methysticum. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2003.09.026] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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