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Lee JW, Lim MC, Lim Y, Tegegn GB, Lee KS. Development of a coffee bean certified reference material (KRISS CRM 108-10-023) for elemental analysis. Anal Bioanal Chem 2024; 416:475-486. [PMID: 37999722 DOI: 10.1007/s00216-023-05051-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/20/2023] [Accepted: 11/09/2023] [Indexed: 11/25/2023]
Abstract
The development of a novel coffee bean matrix certified reference material (CRM) for elemental analysis is described. The CRM was prepared by processing green coffee beans into a dry homogeneous powder. Mass fractions of elements in the CRM were measured using double isotope dilution inductively coupled plasma mass spectrometry (double ID-ICP-MS), and measurement results for eight elements (Mg, Ca, Fe, Cu, Zn, Cd, Hg, and Pb) of sufficient quality were certified. The mass fraction range was from 0.09476 mg/kg (Cd) to 1908 mg/kg (Mg), with relative expanded uncertainty range of 0.66% (Cd) to 12% (Pb). Measurement results of two elements (Cr and Ni) with insufficient quality were provided for information only. During characterization, an effective approach for the measurement of isotopic abundances and molar masses of elements with high natural isotopic variations for double ID-ICP-MS was developed and applied. The CRM developed in the present study is expected to be a useful measurement standard for assuring the quality of measurement procedures for coffee beans or related materials.
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Affiliation(s)
- Jong Wha Lee
- Inorganic Metrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea
| | - Myung Chul Lim
- Inorganic Metrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea
| | - Youngran Lim
- Inorganic Metrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea
| | - Gizachew Betru Tegegn
- Inorganic Metrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea
- Department of Bio-Analytical Science, University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Kyoung-Seok Lee
- Inorganic Metrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Daejeon, 34113, Republic of Korea.
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Zhang M, Pan D, Jin B, Zheng R, Xuan Y. Development of a certified reference material for accurate determination of the leaching of Pb and Zn in solid waste. Anal Bioanal Chem 2023; 415:6355-6362. [PMID: 37603084 DOI: 10.1007/s00216-023-04912-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/31/2023] [Accepted: 08/09/2023] [Indexed: 08/22/2023]
Abstract
Certified reference materials (CRMs) with high accuracy and traceability play a significant role in the calibration of equipment and validation of analytical methods. However, there is still a lack of suitable solid waste CRMs for quality assurance and quality control. Thus, a CRM (GBW(E)085538) was developed for accurate determination and reliable measurement of the leaching of Pb and Zn in solid waste according to the requirements of ISO 17034 and the recommendations of ISO Guide 35. This study describes the steps performed for the development of the CRM. These steps include material preparation, homogeneity, and stability during transport and storage, assignment of certified values, and their uncertainties. The material was dried, ground, sieved and well-mixed, and the final bulk material was bottled in 1 kg portions. Analytical techniques like inductively coupled plasma-mass spectrometry (ICP-MS), inductively coupled plasma-optical emission spectrometry (ICP-OES), and flame atomic absorption spectrometry (AAS) have been used for the characterization of property values. Concurrently, an inter-laboratory comparison study involving 9 qualified laboratories was implemented to support the certification study. The certified values of Pb and Zn were (4.66 ± 0.21) mg/L and (2.95 ± 0.14) mg/L with 7-month stability.
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Affiliation(s)
- Menghuan Zhang
- Zhejiang Huakun Geological Development Co., Ltd, Wenzhou, 325000, China
| | - Dajian Pan
- Zhejiang Huakun Geological Development Co., Ltd, Wenzhou, 325000, China
| | - Bi Jin
- Zhejiang Huakun Geological Development Co., Ltd, Wenzhou, 325000, China
| | - Ruru Zheng
- Zhejiang Huakun Geological Development Co., Ltd, Wenzhou, 325000, China
| | - Yuzhi Xuan
- Zhejiang Huakun Geological Development Co., Ltd, Wenzhou, 325000, China.
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Lee S, Baek SY, Han J, Lee J. Development of a certified reference material for the accurate analysis of the acrylamide content in infant formula. Anal Bioanal Chem 2023:10.1007/s00216-023-04779-4. [PMID: 37269307 DOI: 10.1007/s00216-023-04779-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/15/2023] [Accepted: 05/26/2023] [Indexed: 06/05/2023]
Abstract
A certified reference material (CRM), KRISS CRM 108-02-006, was developed for the accurate analysis of low levels of acrylamide in infant formula matrices. The CRM is an infant formula fortified with acrylamide at a similar level as that stipulated by the European Union regulation for baby food. Commercially available infant formulas were processed by freeze-drying, and the subsequent homogenization of the fortified material to produce 961 bottles of the CRM in one batch. The CRM bottles containing approximately 15 g of the material in each unit were stored in a storage room at - 70 ℃. High-purity acrylamide was used as the primary reference material, and its purity was assessed using an in-house mass-balance method to obtain results metrologically traceable to the International System of Units. The acrylamide content of the infant formula CRM was evaluated using isotope dilution-liquid chromatography/mass spectrometry as a reference method, which was established by our research group. An acrylamide content of 55.7 ± 2.1 μg/kg was assigned as the certified value of the CRM with the expanded uncertainty at a 95% confidence level. The homogeneity study showed good uniformity of the acrylamide content among units, providing a relative standard deviation of 1.2% of the mean value. A stability study was also performed by monitoring the CRM under different temperature conditions and periods. The stability results indicated that the acrylamide content in the CRM under the storage conditions of - 70 ℃ remained stable for up to 10 months.
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Affiliation(s)
- Sunyoung Lee
- Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Deajeon, 34113, Republic of Korea.
| | - Song-Yee Baek
- Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Deajeon, 34113, Republic of Korea
| | - Jeesoo Han
- Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Deajeon, 34113, Republic of Korea
| | - Joonhee Lee
- Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science (KRISS), Deajeon, 34113, Republic of Korea.
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Development of a certified reference material for the accurate determination of type B trichothecenes in corn. Food Chem 2023; 404:134542. [DOI: 10.1016/j.foodchem.2022.134542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 09/04/2022] [Accepted: 10/04/2022] [Indexed: 11/22/2022]
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Lee J, Kim B, Sim HJ, Seo D, Kwak BM, Won J, Lee S, Baek SY, Han J. Development of a certified reference material for the analysis of vitamins in multivitamin tablets. J Anal Sci Technol 2023. [DOI: 10.1186/s40543-023-00368-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
AbstractMultivitamin tablet certified reference material (CRM, 108-10-019) was developed for the analysis of seven water-soluble vitamins, including thiamine, riboflavin, nicotinamide, pantothenic acid, pyridoxine, biotin, and folic acid. The CRM was prepared in powder form by grinding multivitamin tablets and then mixing, sieving, and bottling the powder. For the certification of each water-soluble vitamin, the isotope dilution mass spectrometry based on the liquid chromatography was applied. The methods for each analyte were validated by confirming the repeatability and reproducibility and by comparing with other CRMs. The property values and uncertainties for the vitamins were determined with 10 units from sample stored at − 20 °C. The homogeneity of each certified component was also examined in the range of 0.48–2.2%. All certified values for the seven water-soluble vitamins were stable for 3 or 6 years after the initial certification under storage conditions at − 20 °C. For fat-soluble vitamins, including retinol, α-tocopherol, cholecalciferol, and phylloquinone, two expert laboratories participated in analyses based on official methods, and the mean values of the reported results were assigned as reference values. The multivitamin tablet CRM (108-10-019) will be useful for validating analytical methods and for ensuring the quality of results for vitamin analysis in multivitamin tablets or similar products.
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Seo MS, Jeong JS, Abady MM, Kwon HJ. Candidate reference measurement procedure based on HPAEC-PAD for the development of certified reference materials for monosaccharides in serum. Anal Bioanal Chem 2021; 413:5517-5527. [PMID: 34286356 DOI: 10.1007/s00216-021-03537-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/29/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
To achieve the measurement reliability of monosaccharides used as diagnostic markers in clinical fields, it is essential to establish certified reference materials (CRMs). The purpose of this study is to develop a serum CRM by adopting high-performance anion-exchange chromatography with pulsed amperometric detection (HPAEC-PAD) as a new candidate reference measurement procedure for the measurement of glucose and galactose, common diagnostic markers of diabetes and galactosemia, respectively. Using various monosaccharides as internal standards, the accuracy of the HPAEC-PAD method was tested by measuring glucose CRM following treatment with three different deproteinization methods: ultrafiltration, protein precipitation by trichloroacetic acid (TCA), and protein precipitation by acetonitrile. Results showed that ultrafiltration and 5% TCA provided good accuracy with every tested monosaccharide as the internal standard. Accordingly, serum samples in this study were treated by ultrafiltration after adding 2-deoxy-D-glucose and arabinose, which were selected as internal standards for galactose and glucose, respectively. Both intra- and inter-day recovery tests showed good precision and accuracy within 2%. From the serum CRM batches prepared at two levels, 11 units were analyzed by exact-matched calibration methods, and the mass fractions of galactose and glucose were determined via HPAEC-PAD. The between-unit relative standard deviations were not more than 1.5%, showing homogeneity. The expanded uncertainties (%) of galactose and glucose for both levels were less than 3.6% and 2.3% at 95% confidence. The HPAEC-PAD method presented in this study can significantly improve the accuracy and precision of simultaneous monosaccharide analysis, allowing for the development of further serum CRMs for monosaccharides. Graphical abstract.
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Affiliation(s)
- Min-Seon Seo
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.,Department of Chemistry, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Ji-Seon Jeong
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.,Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea
| | - Mariam M Abady
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.,Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea.,Department of Nutrition and Food Science, National Research Center, Dokki, Cairo, 12622, Egypt
| | - Ha-Jeong Kwon
- Biometrology Group, Division of Chemical and Biological Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-Gu, Daejeon, 34113, Republic of Korea.
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Development of certified reference materials for the determination of cadmium and acrylamide in cocoa. Anal Bioanal Chem 2020; 412:4659-4668. [PMID: 32483646 PMCID: PMC8192399 DOI: 10.1007/s00216-020-02719-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/11/2020] [Accepted: 05/15/2020] [Indexed: 11/05/2022]
Abstract
Since 1 January 2019 a maximum content of 0.6 mg kg−1 cadmium (Cd) in cocoa powder sold to the final consumer or as an ingredient in sweetened cocoa powder sold to the final consumer (drinking chocolate) is set by the Commission Regulation (EU) No. 488/2014. Monitoring compliance with the specified limit value requires analytical measuring methods and reference materials for quality control. However, suitable certified reference materials intended for quality assurance and quality control purposes are still lacking. Therefore, three cocoa reference materials (ERM®-BD513, ERM®-514 and ERM®-515) were developed according to the requirements of ISO 17034 and the recommendations of ISO Guide 35. The whole process of reference material development, including material preparation, assessment of homogeneity and stability, characterisation and value assignment is presented. The assignment of the certified mass fractions was based upon an interlaboratory comparison study involving 19 expert laboratories for Cd and 12 laboratories for acrylamide. The certified mass fractions and expanded uncertainties (k = 2) of the reference materials were (0.181 ± 0.009) mg kg−1 Cd (ERM®-BD513), (0.541 ± 0.024) mg kg−1 Cd (ERM®-BD514) and (0.690 ± 0.029) mg kg−1 Cd (ERM®-BD515). Acrylamide contents are given for information.
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Tran TTH, Kim J, Rosli N, Mok I, Oh KH, Lee H, Hong SP, Jin YX, Wu L, Wang J, Sakaguchi Y, Kinumi T, Takatsu A, Kim SK, Jeong JS. Certification and stability assessment of recombinant human growth hormone as a certified reference material for protein quantification. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1126-1127:121732. [PMID: 31376580 DOI: 10.1016/j.jchromb.2019.121732] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 06/26/2019] [Accepted: 07/24/2019] [Indexed: 11/26/2022]
Abstract
A certified reference material (CRM) for the quantification of protein, essential to manage quality control and quality assurance in protein-related works, has been developed. Amino acid analysis with conventional acid hydrolysis and isotope dilution HPLC-MS was used to establish an SI-traceable absolute protein quantification method using recombinant human growth hormone (hGH) as a model protein. The certification method was verified by comparative studies between 1) different methods of protein quantification based on microwave-assisted hydrolysis, and 2) different labs as part of the Asian Collaboration on Reference Material project with Japan, China, and Korea. Certification, evaluation of measurement uncertainty, homogeneity testing, and stability testing were carried out, after which the candidate CRM for hGH quantification was successfully certified with excellent agreement within the certified value in the two comparative studies. Although the quantification value of hGH by amino acid analysis showed good robustness in various conditions, results of intact protein analysis showed degradation profiles in temperatures higher than 4 °C. Consequently, storage and dissemination conditions should be set in accordance with stability tests. Based on the results, this method is believed to be suitable for accurate quantification of hGH. Additionally, it can also be used as a guide to preparation of CRM, and instructions for quality management of protein work for other similar proteins.
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Affiliation(s)
- Thi Thanh Huong Tran
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Juok Kim
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea; College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Nordiana Rosli
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Inkyu Mok
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Kyong Hwa Oh
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Hwashim Lee
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea
| | - Seon-Pyo Hong
- College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - You-Xun Jin
- Division of Medical and Biological Measurement, National Institute of Metrology, Beijing 100013, People's Republic of China
| | - Liqing Wu
- Division of Medical and Biological Measurement, National Institute of Metrology, Beijing 100013, People's Republic of China
| | - Jing Wang
- Division of Medical and Biological Measurement, National Institute of Metrology, Beijing 100013, People's Republic of China
| | - Yohei Sakaguchi
- Bio-Medical Standard Section, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umenozo, Tsukuba, Ibaraki 305-8563, Japan
| | - Tomoya Kinumi
- Bio-Medical Standard Section, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umenozo, Tsukuba, Ibaraki 305-8563, Japan
| | - Akiko Takatsu
- Bio-Medical Standard Section, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umenozo, Tsukuba, Ibaraki 305-8563, Japan
| | - Sook-Kyung Kim
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Ji-Seon Jeong
- Center for Bioanalysis, Department of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Youseong-gu, Daejeon 34113, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea.
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Lee J, Kim B, Lee SY, Choi J, Kang D, Lee H, Choi K, Lee H, Sim HJ, Baek SY, Lee H, Hyung SW, Ahn S, Seo D, Hwang J, Park JS, Kwak BM, Won J. Development of an infant formula certified reference material for the analysis of organic nutrients. Food Chem 2019; 298:125088. [PMID: 31260987 DOI: 10.1016/j.foodchem.2019.125088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 06/25/2019] [Accepted: 06/26/2019] [Indexed: 12/18/2022]
Abstract
Infant formula certified reference material (CRM, KRISS CRM 108-02-003) were developed for the analysis of organic nutrients. The CRM is a milk-based infant formula powder, packaged at 14 g per unit. Ten thousand units were prepared and stored at -70 °C. For the certification of each nutrient, ten units were analyzed for simultaneous value-assignment and homogeneity test. Analytical methods used were isotope dilution mass spectrometry (IDMS) based on liquid chromatography mass spectrometer (LC/MS) or gas chromatography mass spectrometer (GC/MS) as higher-order reference methods.13 vitamins, 3 fatty acids, and total cholesterol were certified. The between-unit relative standard deviation of measurement results for each nutrient ranged 0.2% to 2.5%, showing very good homogeneity. The expanded relative uncertainties of the certified values ranged from 1% to 8%, indicating that they have higher-order metrological quality. The values of proximates (proteins, lipids, carbohydrates, water, and ash) were assigned through inter-laboratory comparisons.
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Affiliation(s)
- Joonhee Lee
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Byungjoo Kim
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea.
| | - Sun Young Lee
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Jongoh Choi
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Dukjin Kang
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Hwasim Lee
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - KiHwan Choi
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Hyeyoung Lee
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Hee-Jung Sim
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Song-Yee Baek
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Honghee Lee
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Seok-Won Hyung
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Seonghee Ahn
- Division of Chemical and Medical Metrology, Korea Research Institute of Standards and Science, Yuseong, Daejeon 34113, Republic of Korea
| | - Dongwon Seo
- Food Analysis Center, Korea Food Research Institute, Wanju-Gun, Jeollabuk-do 55365, Republic of Korea
| | - Jinbong Hwang
- Food Analysis Center, Korea Food Research Institute, Wanju-Gun, Jeollabuk-do 55365, Republic of Korea
| | - Jong-Su Park
- Food Safety Center, Namyang Dairy Products Company, Sejong 30055, Republic of Korea
| | - Byung-Man Kwak
- Food Safety Center, Namyang Dairy Products Company, Sejong 30055, Republic of Korea
| | - Jongeun Won
- Food Safety Center, Namyang Dairy Products Company, Sejong 30055, Republic of Korea
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Lee SY, Kim K, Kwon HS, Kim YE, Kim KY, Jeong J, Oh HB, Kim TY, Hong J, Kang D. Development of Triglyceride Certified Reference Materials in Human Frozen Serum Using Isotope Dilution‐Liquid Chromatography–Tandem Mass Spectrometry. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sun Young Lee
- College of PharmacyKyung Hee University Seoul 02447 Republic of Korea
| | - Kwonseong Kim
- Department of ChemistrySogang University Seoul 04107 Republic of Korea
| | - Hyun Soo Kwon
- School of Earth Science and Environment EngineeringGwangju Institute of Science and Technology Gwangju 61005 Republic of Korea
| | - Young Eun Kim
- Therapeutics & Biotechnology DivisionKorea Research Institute of Chemical Technology Daejeon 305‐600 Republic of Korea
| | - Ki Young Kim
- Therapeutics & Biotechnology DivisionKorea Research Institute of Chemical Technology Daejeon 305‐600 Republic of Korea
| | - Ji‐Seon Jeong
- Center for Bioanalysis, Division of Chemical and Medical MetrologyKorea Research Institute of Standards and Science Daejeon 34113 Republic of Korea
| | - Han Bin Oh
- Department of ChemistrySogang University Seoul 04107 Republic of Korea
| | - Tae Young Kim
- School of Earth Science and Environment EngineeringGwangju Institute of Science and Technology Gwangju 61005 Republic of Korea
| | - Jongki Hong
- College of PharmacyKyung Hee University Seoul 02447 Republic of Korea
| | - Dukjin Kang
- Center for Bioanalysis, Division of Chemical and Medical MetrologyKorea Research Institute of Standards and Science Daejeon 34113 Republic of Korea
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Tran TTH, Lim J, Kim J, Kwon HJ, Kwon GC, Jeong JS. Fully international system of units-traceable glycated hemoglobin quantification using two stages of isotope-dilution high-performance liquid chromatography–tandem mass spectrometry. J Chromatogr A 2017; 1513:183-193. [DOI: 10.1016/j.chroma.2017.07.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 07/05/2017] [Accepted: 07/17/2017] [Indexed: 10/19/2022]
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12
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Development of certified reference materials for accurate determination of fluoroquinolone antibiotics in chicken meat. Food Chem 2017; 229:472-478. [DOI: 10.1016/j.foodchem.2017.02.112] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/21/2017] [Accepted: 02/22/2017] [Indexed: 01/17/2023]
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A reference measurement procedure for amino acids in blood using isotope dilution ultra-performance liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1055-1056:72-80. [DOI: 10.1016/j.jchromb.2017.04.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/06/2017] [Accepted: 04/14/2017] [Indexed: 01/06/2023]
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14
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Development of a lyophilized soybean paste certified reference material for the analysis of ochratoxin A. J Food Compost Anal 2016. [DOI: 10.1016/j.jfca.2016.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Lee J, Song YS, Sim HJ, Kim B. Isotope dilution-liquid chromatography/mass spectrometric method for the determination of riboflavin content in multivitamin tablets and infant formula. J Food Compost Anal 2016. [DOI: 10.1016/j.jfca.2016.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Kim B, Hyung SW. Stability Monitoring of Acrylamide in Potato Chip Certified Reference Material. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Byungjoo Kim
- Korea Research Institute of Standards and Science; Daejeon Yuseong-gu 305-340 Korea
| | - Seok-Won Hyung
- Korea Research Institute of Standards and Science; Daejeon Yuseong-gu 305-340 Korea
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Kim IJ, Kim B, Hwang E. An Approach for the Uncertainty Evaluation of the Overall Result from Replications of Measurement: Separately Combining Individual Uncertainty Components According to their 'systematic' and 'random' Effects. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.4.1057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Shin HJ, Song JH, Jung JY, Kwak YK, Kay CS, Kang YN, Choi BO, Jang HS, Son SH. Advantage of 3D volumetric dosemeter in delivery quality assurance of dynamic arc therapy: comparison of pencil beam and Monte Carlo calculations. Br J Radiol 2013; 86:20130353. [DOI: 10.1259/bjr.20130353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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20
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Lee S, Yoo M, Koo M, Kim HJ, Kim M, Park SK, Shin D. In-house-validated liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for survey of acrylamide in various processed foods from Korean market. Food Sci Nutr 2013; 1:402-7. [PMID: 24804047 PMCID: PMC3967774 DOI: 10.1002/fsn3.56] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 07/11/2013] [Accepted: 07/14/2013] [Indexed: 11/08/2022] Open
Abstract
Acrylamide (AA) is a chemical found in starchy foods that have been cooked at high temperatures. The objective of this study is to monitor the levels of AA in a total of 274 samples of potato chips, chips (except potato chips), biscuits, French fries, breakfast cereals, chocolate products, tea, seasoned laver, and nut products sampled in Korean market. These processed foods include (1) potato chips, (2) chips (except potato chips), (3) biscuits, (4) French fries, (5) breakfast cereals, (6) chocolate products, (7) tea, (8) seasoned laver, and (9) nut products. Samples used for this study were cleaned up using HLB Oasis polymeric and Accucat mixed-mode anion and cation exchange solid-phase extraction cartridge. Liquid chromatography-tandem mass spectroscopy (LC-MS/MS) was validated in-house as an efficient analytical method for the routine analysis of AA in various food products. AA was detected with a Fortis dC18 (1.7 μm, 100 mm × 2.1 mm) column using 0.5% methanol/0.1% acetic acid in water as the mobile phase. Good results were obtained with respect to repeatability (RSDs < 5%). The recoveries obtained for a variety of food matrices ranged between 94.5% and 107.6%. Quantification during routine monitoring was sensitive enough to detect AA at a concentration of 10 μg/kg. A total of 274 food samples were analyzed for AA. The AA levels in the food groups were in the following order: potato chips > French fries > biscuits > tea > chips (except potato chips) > seasoned laver > breakfast cereals > chocolate products > nut products. AA was detected at levels ranging from not detectable to 1435 μg/kg.
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Affiliation(s)
- Sanghee Lee
- Food Analysis Center, Korea Food Research Institute Seongnam, Korea
| | - Miyoung Yoo
- Food Analysis Center, Korea Food Research Institute Seongnam, Korea
| | - Minseon Koo
- Food Analysis Center, Korea Food Research Institute Seongnam, Korea
| | - Hyun Jung Kim
- Food Analysis Center, Korea Food Research Institute Seongnam, Korea
| | - Meehye Kim
- Food Contaminants Division, Korea Food and Drug Administration Seoul, Korea
| | - Sung-Kug Park
- Food Contaminants Division, Korea Food and Drug Administration Seoul, Korea
| | - Dongbin Shin
- Food Analysis Center, Korea Food Research Institute Seongnam, Korea
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Lim HH, Shin HS. Ultra trace level determinations of acrylamide in surface and drinking water by GC-MS after derivatization with xanthydrol. J Sep Sci 2013; 36:3059-66. [PMID: 23836628 DOI: 10.1002/jssc.201300209] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 06/07/2013] [Accepted: 06/11/2013] [Indexed: 11/06/2022]
Abstract
A sensitive GC-MS method has been established for the determination of acrylamide in surface and drinking water based on derivatization with xanthydrol. Deuterated acrylamide (acrylamide-d3 ) was chosen as the internal standard for analyzing the water sample. The derivatization of acrylamide was performed directly in water, and the best reaction conditions (xanthydrol of 1.6 mM, HCl concentration of 0.05 M, reaction for 30 min at ambient temperature) were established by variation of parameters. Under the established conditions, the detection and quantification limits were 3.0 and 9.7 ng/L, respectively, and the interday RSD was less than 8% at concentrations of 20 and 100 ng/L.
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Affiliation(s)
- Hyun-Hee Lim
- Department of Environmental Science, Kongju National University, Kongju, Republic of Korea
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Accurate measurement of bromine contents in plastic samples by instrumental neutron activation analysis. Anal Chim Acta 2013; 769:22-9. [DOI: 10.1016/j.aca.2013.01.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 12/27/2012] [Accepted: 01/17/2013] [Indexed: 11/17/2022]
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Shin H, Kim B, Lee J. Investigation of isotope dilution mass spectrometric (ID-MS) method to determine niacin in infant formula, breakfast cereals and multivitamins. Food Chem 2012; 138:1109-15. [PMID: 23411221 DOI: 10.1016/j.foodchem.2012.11.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 10/30/2012] [Accepted: 11/09/2012] [Indexed: 10/27/2022]
Abstract
An isotope dilution LC/mass spectrometric (ID-LC/MS) method was developed as a candidate reference method for the accurate determination of niacin in infant formula, breakfast cereals and multivitamin. After spiking nicotinamide-d(4) as an internal standard, infant formula and breakfast cereal samples were hydrolysed under alkaline condition. Samples were then analysed in SRM mode to detect nicotinic acid and nicotinic acid-d(4) at m/z 124→80 and 127→84, respectively. In the case of multivitamin sample that contains mainly free nicotinamide, LC/MS monitored nicotinamide and nicotinamide-d(4) at their SRM channels of m/z 123→80 and m/z 127→84, respectively, after simple extraction. The repeatability and reproducibility were tested for the validation of the developed ID/LC-MS method. Additionally, the developed analytical method was applied to determine total niacin contents in homogenised infant formula, homogenised multivitamin, and commercially available products including different types of infant formula, breakfast cereals, and multivitamin tablets.
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Affiliation(s)
- Hyunju Shin
- Bio-engineering R&D Center, Biospace Co., Ltd., Seoul 135-854, Republic of Korea
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Ahn SH, Lee IS, Kim BJ. Analysis of sorbic acid in tea-drink using isotope dilution liquid chromatography tandem mass spectrometry (ID-LC/MS/MS). ANALYTICAL SCIENCE AND TECHNOLOGY 2012. [DOI: 10.5806/ast.2012.25.1.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ahn SH, Kim BJ, Hwang EJ. Stability Monitoring of Pesticide Residues in a Chinese Cabbage Certified Reference Material. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.4.1365] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Shin HJ, Kim BJ, Lee JH, Hwang EJ. Development of an Isotope-Dilution Liquid Chromatography/Mass Spectrometric Method for the Accurate Determination of Acetaminophen in Tablets. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.12.3663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kim IJ, Min HS, Suh JK, Han MS, Lim MC, Kim YH, Shin SK, Cho KH. Development of soil certified reference material for determination of the hazardous elements. ANALYTICAL SCIENCE AND TECHNOLOGY 2010. [DOI: 10.5806/ast.2010.23.5.485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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