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Yang J, Fan Q, Wang Q, Tian W, Qiu P, Gao B, Du J. Uncertainty evaluation for nine VOC gas certified reference materials used for indoor air testing. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Chen W, Jin W, Zhang Y, Fang H, Chen H, Zhuan H, Huang X. Development of certified reference materials for four polyunsaturated fatty acid esters. Food Chem 2022; 389:133006. [PMID: 35561511 DOI: 10.1016/j.foodchem.2022.133006] [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: 01/14/2022] [Revised: 03/18/2022] [Accepted: 04/17/2022] [Indexed: 11/04/2022]
Abstract
Certified reference materials (CRMs) with high accuracy and traceability are essential tools for the validation of analytical methods and calibration of equipment. In this study, purity CRMs for four polyunsaturated fatty acids (PUFAs) esters, namely, cis-(4,7,10,13,16,19)- Docosahexaenoic acid methyl ester (DHA-ME), cis-4,7,10,13,16,19- Docosahexaenoic acid ethyl ester (DHA-EE), cis-(5,8,11,14,17)- Eicosapentaenoic acid methyl ester (EPA-ME) and cis-(5,8,11,14,17)- Eicosapentaenoic acid ethyl ester (EPA-EE), were first developed according to the ISO Guide. The CRMs' purity values were assigned based on the average of quantitative nuclear magnetic resonance and mass balance approaches. The certified value with expanded uncertainties (k = 2, 95% confidence interval) were determined to be (98.8 ± 0.4) %, (99.0 ± 0.3) %, (98.9 ± 0.4) % and (98.9 ± 0.4) % for DHA-ME, DHA-EE, EPA-ME and EPA-EE, respectively. The four PUFAs esters were homogeneous and stable for 12 months at -4 °C and 7 days at 50 °C.
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Affiliation(s)
- Weizhu Chen
- Third Institute of Oceanography, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China; Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China
| | - Wenhui Jin
- Third Institute of Oceanography, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China; Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China
| | - Yiping Zhang
- Third Institute of Oceanography, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China; Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China
| | - Hua Fang
- Third Institute of Oceanography, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China; Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China.
| | - Hui Chen
- Third Institute of Oceanography, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China; Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China
| | - Hong Zhuan
- Third Institute of Oceanography, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China; Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China.
| | - Xiaoyan Huang
- Third Institute of Oceanography, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China; Engineering Research Center of Marine Biological Resource Comprehensive Utilization, Ministry of Natural Resource, Xiamen, Fujian 361005, PR China
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Wang J, Zhang W, Huang T, Su P, Yang Y. Quantification of a volatile deuterated compound by the differential scanning calorimetry combined with quantitative nuclear magnetic resonance and its verification by the mass balance method combined with gas chromatography-mass spectrometry. Talanta 2022; 246:123538. [DOI: 10.1016/j.talanta.2022.123538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 05/07/2022] [Accepted: 05/08/2022] [Indexed: 10/18/2022]
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Zhou J, Li F, Wang M, Yan C, Yang M, Wang T, Zhang L. Preparation of clorprenaline certified reference material: Purity determination and uncertainty evaluation. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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