Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass Spectrometry
Based on the emulsification/demulsification method, a gas chromatography tandem mass spectrometry method was established for the quantitative determination of 12 nitrosamines in milk. The optimization results of pretreatment conditions such as the type of filter membrane, the type of extractant and...
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The editorial department of Science and Technology of Food Industry
2023-12-01
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Online Access: | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2023020041 |
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author | Wenfeng TONG Jinsong LI Qiao XU Jian LI |
author_facet | Wenfeng TONG Jinsong LI Qiao XU Jian LI |
author_sort | Wenfeng TONG |
collection | DOAJ |
description | Based on the emulsification/demulsification method, a gas chromatography tandem mass spectrometry method was established for the quantitative determination of 12 nitrosamines in milk. The optimization results of pretreatment conditions such as the type of filter membrane, the type of extractant and the number of extractions were as follows: The type of filter membrane was nylon, the extractant was acetonitrile, and the number of extractions was two times. After acetonitrile extraction, deproteinizing, and degreased by emulsification/demulsification, the samples were separated on the HP-INNOWAX chromatographic column. The content of nitrosamines was quantitatively determined by the internal standard method, using multi-reactive ion monitoring (MRM) mode. The results showed that the linear range of N-nitrosopyrrolidine (NPYR) was 2~100 ng/mL, and the linear range of the other nitrosamines was 1~100 ng/mL. All nitrosamines had good determination coefficient which was greater than 0.995. During the high, medium and low-level fortification experiments, the recovery rate ranged from 90.90% to 114.30%, the intra-day precision ranged from 1.76% to 7.62%, and the inter-day precision ranged from 2.75% to 7.71%. The limit of quantitation (LOQ) of N-nitrosopyrrolidine (NPYR) was 4 µg/kg, and the LOQ of other compounds was 2 µg/kg. The method was precise and accurate, that met the demand of accurately testing 12 nitrosamines in milk. The test results of the actual samples indicated that N-nitrosodiphenylamine (NDPhA) was detected in six milk samples, and the content ranged from 4.29 to 6.67 μg/kg. |
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last_indexed | 2024-03-09T14:16:00Z |
publishDate | 2023-12-01 |
publisher | The editorial department of Science and Technology of Food Industry |
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spelling | doaj.art-b20f18c7efa04352b1a265983b9998012023-11-29T01:58:15ZzhoThe editorial department of Science and Technology of Food IndustryShipin gongye ke-ji1002-03062023-12-01442328028610.13386/j.issn1002-0306.20230200412023020041-23Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass SpectrometryWenfeng TONG0Jinsong LI1Qiao XU2Jian LI3Hangzhou Puyu Technology Development Co., Ltd., Hangzhou 311305, ChinaHangzhou Puyu Technology Development Co., Ltd., Hangzhou 311305, ChinaHangzhou Puyu Technology Development Co., Ltd., Hangzhou 311305, ChinaHangzhou Puyu Technology Development Co., Ltd., Hangzhou 311305, ChinaBased on the emulsification/demulsification method, a gas chromatography tandem mass spectrometry method was established for the quantitative determination of 12 nitrosamines in milk. The optimization results of pretreatment conditions such as the type of filter membrane, the type of extractant and the number of extractions were as follows: The type of filter membrane was nylon, the extractant was acetonitrile, and the number of extractions was two times. After acetonitrile extraction, deproteinizing, and degreased by emulsification/demulsification, the samples were separated on the HP-INNOWAX chromatographic column. The content of nitrosamines was quantitatively determined by the internal standard method, using multi-reactive ion monitoring (MRM) mode. The results showed that the linear range of N-nitrosopyrrolidine (NPYR) was 2~100 ng/mL, and the linear range of the other nitrosamines was 1~100 ng/mL. All nitrosamines had good determination coefficient which was greater than 0.995. During the high, medium and low-level fortification experiments, the recovery rate ranged from 90.90% to 114.30%, the intra-day precision ranged from 1.76% to 7.62%, and the inter-day precision ranged from 2.75% to 7.71%. The limit of quantitation (LOQ) of N-nitrosopyrrolidine (NPYR) was 4 µg/kg, and the LOQ of other compounds was 2 µg/kg. The method was precise and accurate, that met the demand of accurately testing 12 nitrosamines in milk. The test results of the actual samples indicated that N-nitrosodiphenylamine (NDPhA) was detected in six milk samples, and the content ranged from 4.29 to 6.67 μg/kg.http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2023020041emulsification/demulsification methodgas chromatography tandem mass spectrometrymilknitrosaminesmethodology |
spellingShingle | Wenfeng TONG Jinsong LI Qiao XU Jian LI Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass Spectrometry Shipin gongye ke-ji emulsification/demulsification method gas chromatography tandem mass spectrometry milk nitrosamines methodology |
title | Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass Spectrometry |
title_full | Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass Spectrometry |
title_fullStr | Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass Spectrometry |
title_full_unstemmed | Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass Spectrometry |
title_short | Determination of 12 Nitrosamines Residues in Milk by Emulsification/Demulsification Method Coupled with Gas Chromatography Tandem Mass Spectrometry |
title_sort | determination of 12 nitrosamines residues in milk by emulsification demulsification method coupled with gas chromatography tandem mass spectrometry |
topic | emulsification/demulsification method gas chromatography tandem mass spectrometry milk nitrosamines methodology |
url | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2023020041 |
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