1
|
Mariychuk R, Sukharev S, Sukhareva O, Roman L, Babilia T. A green procedure for the determination of bioavailable forms of aluminum in natural waters by electrothermal atomic absorption spectroscopy combined with microextraction technique. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:444. [PMID: 39316143 DOI: 10.1007/s10653-024-02230-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Accepted: 09/11/2024] [Indexed: 09/25/2024]
Abstract
Aluminum is a prevalent element in nature, but bioavailable forms of aluminum are toxic to plants, animals, and humans. The present study is dedicated to the development of an ecologically friendly, fast, simple, reliable, sensitive, and accurate improved procedure for the determination of subtrace concentrations of bioavailable forms of aluminum in natural waters. The procedure includes the separation and pre-concentration of bioavailable forms of aluminum using vortex-assisted liquid-liquid microextraction (VALLME) of ionic associates with salicylaldehyde 4-picolinhydrazone (SAPH) and sodium dodecyl sulfate (DDSNa) by isoamylacetate (200 μl) and direct electrothermal atomic absorption spectroscopy (ET AAS). The SAPH reagent interacts only with water-soluble forms of aluminum. SAPH is used for the pre-concentration of bioavailable forms of aluminum as well as a chemical modifier; it increases the absorbance and the precision of the analytical signal of aluminum. The calibration curve shows the linear dependence in the range of 0.05-86 μg⋅L-1 of the aluminum concentration (R2 = 0.992), with the limit of detection at 0.015 μg⋅L-1 and the limit of quantification at 0.05 μg⋅L-1. The accuracy of the proposed procedure for bioavailable forms of aluminum determination was verified on model solutions and against a reference method on natural samples of river and lake waters (RSD 3.2-5.2%, recovery 97.1-103.4%).
Collapse
Affiliation(s)
- Ruslan Mariychuk
- Department of Ecology, University of Presov, 17 November Street 1, 08116, Presov, Slovak Republic
| | - Sergii Sukharev
- Department of Ecology and Environment Protection, Uzhhorod National University, Narodna Square 3, Uzhhorod, 88000, Ukraine.
| | - Oksana Sukhareva
- Department of Analytical Chemistry, Uzhhorod National University, Narodna Square 3, Uzhhorod, 88000, Ukraine
| | - Liudmyla Roman
- Department of Ecology and Environment Protection, Uzhhorod National University, Narodna Square 3, Uzhhorod, 88000, Ukraine
| | - Tetiana Babilia
- Transcarpathian Region Scientific Research Forensic Center of the Ministry of Internal Affairs of Ukraine, Slavyanska Naberezhna 25, Uzhhorod, 88000, Ukraine
| |
Collapse
|
2
|
Luo G, Meng Y, Zhang L, Li X, Tao Z, Zhang Q. Selective recognition of aluminum ions using an esculetin@Q[8] host–guest supramolecular fluorescent probe. NEW J CHEM 2022. [DOI: 10.1039/d1nj04782e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Esculetin (ESC) and non-toxic Q[8] form a supramolecular compound combination, which can effectively monitor Al3+ in the water environment.
Collapse
Affiliation(s)
- Guangyan Luo
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Ye Meng
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Lin Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Xiaoyue Li
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Qianjun Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China
| |
Collapse
|
3
|
Samarina TO, Volkov DS, Mikheev IV, Proskurnin MA. High-Sensitivity and High-Performance Determination of Trace Aluminum in Water for Pharmaceutical Purposes by Microwave Plasma and Inductively Coupled Plasma–Atomic Emission Spectrometry. ANAL LETT 2017. [DOI: 10.1080/00032719.2017.1348510] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- T. O. Samarina
- Analytical Centre, M.V. Lomonosov Moscow State University, Moscow, Russia
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - D. S. Volkov
- Analytical Centre, M.V. Lomonosov Moscow State University, Moscow, Russia
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - I. V. Mikheev
- Analytical Centre, M.V. Lomonosov Moscow State University, Moscow, Russia
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - M. A. Proskurnin
- Analytical Centre, M.V. Lomonosov Moscow State University, Moscow, Russia
- Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
| |
Collapse
|
4
|
Rapid determination of alkaloids in Macleaya cordata using ionic liquid extraction followed by multiple reaction monitoring UPLC–MS/MS analysis. J Pharm Biomed Anal 2017; 135:61-66. [DOI: 10.1016/j.jpba.2016.12.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 12/11/2016] [Accepted: 12/15/2016] [Indexed: 11/18/2022]
|
5
|
A new automated system for the determination of Al(III) species in dialysis concentrates by electrothermal atomic absorption spectrometry using a combination of chelating resin. Microchem J 2015. [DOI: 10.1016/j.microc.2015.04.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
6
|
Yousif AM, Labib SA. Fabrication of New Cellulose-Based Sorbents for Fast and Efficient Removal of Hazardous Al(III) Ions from Their Aqueous Solutions. J DISPER SCI TECHNOL 2015. [DOI: 10.1080/01932691.2015.1050732] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
7
|
Garau A, Oliver M, Rosende M, Mánuel-Vez MP, Miró M. High-throughput automatic flow method for determination of trace concentrations of aluminum in dialysis concentrate solutions using salicylaldehyde picolinoylhydrazone as a turn-on fluorescent probe. Talanta 2015; 133:120-6. [DOI: 10.1016/j.talanta.2014.04.094] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 04/02/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
|
8
|
Stanisz E, Werner J, Zgoła-Grześkowiak A. Liquid-phase microextraction techniques based on ionic liquids for preconcentration and determination of metals. Trends Analyt Chem 2014. [DOI: 10.1016/j.trac.2014.06.008] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
9
|
|
10
|
Khan S, Kazi TG, Baig JA, Afridi HI, Kolachi NF. Separation/preconcentration methods for the determination of aluminum in dialysate solution and scalp hair samples of kidney failure patients. Biol Trace Elem Res 2011; 144:205-16. [PMID: 21573872 DOI: 10.1007/s12011-011-9070-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Accepted: 04/28/2011] [Indexed: 11/25/2022]
Abstract
A new method is reported for the separation of aluminum ions (Al(3+)) from interfering cations in pharmaceutical and biological samples through solid-phase extraction (SPE) using 2-methyl-8-hydroxyquinoline (8-hydroxyquinaldine) on activated silica. While separated Al(3+) was preconcentrated by cloud point extraction (CPE) using 3,5,7,2'-4'-pentahydroxyflavone (morin) as complexing reagent, the resulting complex was entrapped in nonionic surfactant (Triton X-114) as prior step to its determination by spectrofluorimetry (SPF). The validity of separation/preconcentration of Al(3+) was checked by certified reference material of human hair and standard addition method. The chemical variables affecting the analytical performance of the separation/preconcentration methods were studied and optimized. The enrichment factor and detection limit of Al(3+) for the preconcentration of 10 ml of dialysate solution and acid-digested samples of scalp hair samples were found to be 25 and 0.34 μg/L, respectively. The relative standard deviation for six replicates of standard containing 20 μg/L of Al(3+) was <10%. In all DS, the concentration of Al was >10 μg/L. The level of Al in scalp hair samples of kidney failure patients was higher than healthy controls.
Collapse
Affiliation(s)
- Sumaira Khan
- .National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
| | | | | | | | | |
Collapse
|
11
|
HIRAYAMA N. Chelate Extraction of Metals into Ionic Liquids. SOLVENT EXTRACTION RESEARCH AND DEVELOPMENT-JAPAN 2011. [DOI: 10.15261/serdj.18.1] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Naoki HIRAYAMA
- Department of Chemistry, Faculty of Science, Toho University
| |
Collapse
|
12
|
Beniz Gündüz S, Maltaş E, Yıldız S. Fluorimetric Analysis of Aluminum in Diluted Hemodialysis Solutions by Using a Novel Schiff Base. ANAL LETT 2010. [DOI: 10.1080/00032711003763673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
13
|
Bulut VN, Arslan D, Ozdes D, Soylak M, Tufekci M. Preconcentration, separation and spectrophotometric determination of aluminium(III) in water samples and dialysis concentrates at trace levels with 8-hydroxyquinoline-cobalt(II) coprecipitation system. JOURNAL OF HAZARDOUS MATERIALS 2010; 182:331-336. [PMID: 20619964 DOI: 10.1016/j.jhazmat.2010.06.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 05/20/2010] [Accepted: 06/09/2010] [Indexed: 05/29/2023]
Abstract
A separation-preconcentration procedure was developed for the determination of trace amounts of aluminium in water samples and dialysis concentrates by UV-vis Spectrophotometry after coprecipitation using 8-hydroxyquinoline (8-HQ) as a chelating agent and Co(II) as a carrier element. This procedure is based on filtration of the solution containing precipitate on a cellulose nitrate membrane filter following aluminium(III) coprecipitation with Co/8-HQ and then the precipitates together with membrane filter were dissolved in concentrated nitric acid. The metal contents of the final solution were determined by UV-vis Spectrophotometry with Erio Chrome Cyanine-R standard method. Several parameters including pH of sample solution, amount of carrier element and reagent, standing time, sample volume for precipitation and the effects of diverse ions were examined. The enrichment factor was calculated as 50 and the detection limits, corresponding to three times the standard deviation of the blank (N: 10), was found to be 0.2 microg L(-1). The accuracy of the method was tested with standard reference material (CRM-TMDW-500) and spiked addition. Determination of aluminium(III) was carried out in sea water, river water, tap water and haemodialysis fluids samples. The recoveries were >95%. The relative standard deviations of determination were less than 6%.
Collapse
Affiliation(s)
- Volkan Numan Bulut
- Maçka Vocational School, Karadeniz Technical University, 61750 Trabzon, Turkey
| | | | | | | | | |
Collapse
|
14
|
Francisco BBA, Caldas LFS, Brum DM, Cassella RJ. Novel spectrophotometric method for the determination of aluminum in soda drinks packed in cans and plastic bottles. JOURNAL OF HAZARDOUS MATERIALS 2010; 181:485-490. [PMID: 20605324 DOI: 10.1016/j.jhazmat.2010.05.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Accepted: 05/10/2010] [Indexed: 05/29/2023]
Abstract
In the present work, a new spectrophotometric method was developed for the determination of aluminum in soda drinks packed in different materials. Reaction among Al(III), phenylfluorone (PF) and cetylpyridinium chloride (CPC) in slightly alkaline medium was explored for this purpose. The method was optimized regarding to its chemical parameters in order to establish better conditions in terms of sensitivity and selectivity. The results obtained showed that the concentration of CPC presented remarkable influence on the sensitivity and acted as a sensitizer for the studied system. The possible interferences of some metallic cations were evaluated and the cations Cu(II), Mn(II), and Zn(II) presented noticed interference on the Al(III) signal. So, their interference was eliminated by using EDTA with minimum loss of sensitivity. The results obtained in the determination of total aluminum in soda drinks by the developed methodology were not statistically different from those obtained by electrothermal atomic absorption spectrometry. In the optimized conditions the method presented a linear range of 5-100 microg L(-1). The limits of detection and quantification were 0.81 and 2.7 microg L(-1), respectively. The methodology was successfully applied in the determination of aluminum in 10 samples of soda drinks packed in cans and plastic bottles.
Collapse
Affiliation(s)
- Barbara Bruna A Francisco
- Departamento de Química Analítica, Universidade Federal Fluminense, Outeiro de São João Batista s/n, Centro, Niterói/RJ, Brazil
| | | | | | | |
Collapse
|
15
|
Pourreza N, Ghanemi K. Solid phase extraction of cadmium on 2-mercaptobenzothiazole loaded on sulfur powder in the medium of ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate and cold vapor generation-atomic absorption spectrometric determination. JOURNAL OF HAZARDOUS MATERIALS 2010; 178:566-571. [PMID: 20176439 DOI: 10.1016/j.jhazmat.2010.01.122] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2009] [Revised: 01/12/2010] [Accepted: 01/25/2010] [Indexed: 05/28/2023]
Abstract
A novel solid phase extractor for preconcentration of cadmium at ng L(-1) levels has been developed. Cadmium ions were retained on a column packed with sulfur powder modified with 2-mercaptobenzothiazole (2-MBT) in the medium of 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim](+)PF(6)(-)) ionic liquid. The presence of ionic liquid during modification of sulfur enhanced the retention of cadmium ions on the column. The retained cadmium ions were eluted with 2 mol L(-1) solution of HCl and measured by cold vapor generation-atomic absorption spectrometry (CVG-AAS). By using reaction cell-gas liquid separator (RC-GLS), gaseous cadmium vapors were produced and reached the atomic absorption spectrometer, instantaneously. The influence of different variables on both processes of solid phase extraction and CVG-AAS determination of cadmium ions was investigated. The calibration curve was linear in the range of 10-200 ng L(-1)of cadmium in the initial solution with r=0.9992 (n=8) under optimum conditions. The limit of detection based on three times the standard deviation of the blank (3S(b), n=10) was 4.6 ng L(-1). The relative standard deviation (R.S.D.) of 25 and 150 ng L(-1) of cadmium was 4.1 and 2.2% (n=8), respectively. The procedure was validated by the analysis of a certified reference material (DORM-3), water and fish samples.
Collapse
Affiliation(s)
- N Pourreza
- Department of Chemistry, Faculty of Science, Shahid Chamran University, Ahvaz, Iran.
| | | |
Collapse
|
16
|
Ramachandraiah C, Rajesh Kumar J, Adinarayana Reddy S, Lee JY, Varada Reddy A. Development of a highly sensitive and selective method for extractive spectrophotometric determination of aluminum(III) from environmental matrices, synthetic mixtures, and alloys using orthohydroxypropiophenoneisonicotinoylhydrazone. ENVIRONMENTAL MONITORING AND ASSESSMENT 2010; 160:23-31. [PMID: 19058020 DOI: 10.1007/s10661-008-0654-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Accepted: 11/05/2008] [Indexed: 05/27/2023]
Abstract
Orthohydroxypropiophenoneisonicotinoylhydrazone (OHPINH) is proposed as a new sensitive reagent for the spectrophotometric determination of aluminum(III). OHPINH formed a greenish-yellow colored complex with aluminum(III) in buffer solutions of pH 1 to 3. The color in pH 2 was stable for more than 48 h. The complex solution has given maximum absorbance at 390 nm when the reagent was chosen as blank and the absorbance of the reagent at this wavelength is negligible; the molar absorptivity and Sandell's sensitivity being 0.6371x10(4) L mol(-1) cm(-1) and 4.234x10(-3) microg cm(-2), respectively. The system obeys Beer's law in the range of 0.5-3.5 microg mL(-1) with excellent linearity in terms of the correlation coefficient value of 0.999. Most of the common metal ions generally found associated with aluminum(III) do not interfere. The repeatability of the method was checked by finding the relative standard deviation. The developed method has been successfully employed for the determination of aluminum(III) environmental matrices like medicinal and leafy samples, alloys, and synthetic mixtures.
Collapse
Affiliation(s)
- C Ramachandraiah
- Analytical Chemistry Division, Department of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh, 517 502, India
| | | | | | | | | |
Collapse
|
17
|
Manzoori JL, Amjadi M, Abulhassani J. Ultra-trace determination of lead in water and food samples by using ionic liquid-based single drop microextraction-electrothermal atomic absorption spectrometry. Anal Chim Acta 2009; 644:48-52. [DOI: 10.1016/j.aca.2009.04.029] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 04/15/2009] [Accepted: 04/18/2009] [Indexed: 10/20/2022]
|
18
|
Huseyinli AA, Alieva R, Haciyeva S, Güray T. Spectrophotometric determination of aluminium and indium with 2,2',3,4-tetrahydroxy-3',5'-disulphoazobenzene. JOURNAL OF HAZARDOUS MATERIALS 2009; 163:1001-1007. [PMID: 18783882 DOI: 10.1016/j.jhazmat.2008.07.055] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2007] [Revised: 06/02/2008] [Accepted: 07/14/2008] [Indexed: 05/26/2023]
Abstract
2,2',3,4-Tetrahydroxy-3',5'-disulphoazobenzene (tetrahydroxyazon 2S) has been synthesized for the first time. This reagent has been used for the spectrophotometric determination of aluminium and indium ions. The method is very sensitive and selective for the direct determination of aluminium and indium. The optimum pH and absorbance of complexes formed of tetrahydroxyazon 2S with aluminium and indium are 5; 500 nm and 495 nm for Al and In, respectively. The system obeys Beer's law at 0.05-1.6 microg mL(-1) of aluminium and 0.06-2.1 microg mL(-1) of indium concentration. The molar absorptivity is 6.42 x 10(4)L mol(-1)cm(-1) for aluminium and 7.70 x 10(4)L mol(-1)cm(-1) for indium. The molar compositions of the complexes are 1:1 at optimum conditions. Alkaline and alkaline earth elements, halogens, thiourea, ascorbic acid, Cd(II), Pb(II), Mn(II), Zn(II), Co(II), Ni(II), Cr(III), Bi(III), La(III), Si(IV) do not interfere this method. The method can be applied to the direct spectrophotometric determination of trace amounts of aluminium in steel, alloys, waste water, river waters, spring water and ground water. The method was also successfully applied to the indium determination in artificial mixture.
Collapse
Affiliation(s)
- A A Huseyinli
- Baku State University, Faculty of Chemistry, Baku 1148, Azerbaijan.
| | | | | | | |
Collapse
|
19
|
Ionic liquids in sample preparation. Anal Bioanal Chem 2008; 393:871-83. [DOI: 10.1007/s00216-008-2445-6] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Revised: 09/25/2008] [Accepted: 09/30/2008] [Indexed: 10/21/2022]
|
20
|
López-Gonzálvez A, Ruiz M, Barbas C. Validated flow-injection method for rapid aluminium determination in anti-perspirants. J Pharm Biomed Anal 2008; 48:340-6. [DOI: 10.1016/j.jpba.2008.01.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2007] [Revised: 01/11/2008] [Accepted: 01/14/2008] [Indexed: 10/22/2022]
|
21
|
Affiliation(s)
- Naoki Hirayama
- Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University
| |
Collapse
|
22
|
Komárek J, Cervenka R, Růzicka T, Kubán V. ET-AAS determination of aluminium in dialysis concentrates after continuous flow solvent extraction. J Pharm Biomed Anal 2007; 45:504-9. [PMID: 17897803 DOI: 10.1016/j.jpba.2007.08.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2007] [Revised: 08/13/2007] [Accepted: 08/16/2007] [Indexed: 11/29/2022]
Abstract
Conditions of a continuous flow extraction (CFE) of aluminium acetylacetonate in acetylacetone and aluminium 8-hydroxyquinolinate into methylisobutylketone (lengths of reaction and extraction coils, flow rates of aqueous and organic phases and their flow rate ratio, pH of aqueous phase, lengths of coils for transport of aqueous and organic phases and effect of salts) were studied. The analytical signal of the aluminium chelates present in the organic phase was measured at 309.3 nm using atomic absorption spectrometry with electrothermal atomization (ET-AAS) at the flow rate ratio F aq/F org=3 for aqueous and organic phases. The five points calibration curves were linear (R2 0.9973 and 0.9987) up to 21 microgl(-1) Al with the limits of detection of 0.3 microgl(-1) and the recovery 100+/-2% and precision of 3% at 2-10-fold dilution of the dialysis concentrates. The acetylacetonate method was applied to the determination of aluminium in real dialysis concentrates. Aluminium in concentrations 5-6 microgl(-1) (R.S.D.s 5-10% in real samples) were found and the results were in the very good agreement with those obtained by an ET-AAS using preconcentration of Al(III) on a Spheron-Salicyl chelating sorbent (absolute and relative differences were under 0.4 microgl(-1) and 8.2%, respectively).
Collapse
Affiliation(s)
- J Komárek
- Department of Analytical Chemistry, Masaryk University, Kotlárská 2, CZ-611 37 Brno, Czech Republic
| | | | | | | |
Collapse
|