固相萃取/液相色谱-串联质谱法测定食品中二甲基黄

引用本文: 李优, 徐敦明, 伊雄海, 盛永刚, 时逸吟, 赵善贞, 邓晓军. 固相萃取/液相色谱-串联质谱法测定食品中二甲基黄[J]. 色谱, 2017, 35(4): 398-404. doi: 10.3724/SP.J.1123.2016.10042 shu

Citation: LI You, XU Dunming, YI Xionghai, SHENG Yonggang, SHI Yiyin, ZHAO Shanzhen, DENG Xiaojun. Determination of dimethyl yellow in foods by liquid chromatography-tandem mass spectrometry coupled with solid phase extraction[J]. Chinese Journal of Chromatography, 2017, 35(4): 398-404. doi: 10.3724/SP.J.1123.2016.10042 shu

固相萃取/液相色谱-串联质谱法测定食品中二甲基黄

李优 ^1, ,
徐敦明 ^2, ,
伊雄海 ^1, ,
盛永刚 ^1, ,
时逸吟 ^1, ,
赵善贞 ^1, ,
邓晓军 ^1,

1.
上海出入境检验检疫局, 上海 200135;
2.
厦门出入境检验检疫局, 福建厦门 361026
基金项目:
国家重大科学仪器设备开发专项（2013YQ15055705）；上海市技术性贸易措施应对专项（14TBT006，15TBT004，15TBT005）；上海市科委技术标准专项（15DZ0503201）；长三角科技合作项目（15395810100）.

摘要: 建立了液相色谱-串联质谱（LC-MS/MS）测定食品中二甲基黄（DMY）的分析方法。样品经乙酸乙酯提取，二甲基黄专用固相萃取小柱（ProElut DMY SPE）净化，XDB-C18色谱柱（50 mm×4.6 mm，1.8 μm）分离，并以5 mmol/L乙酸铵水溶液（含0.1%（v/v）甲酸）-乙腈（含0.1%（v/v）甲酸）为流动相，梯度洗脱，电喷雾正离子模式（ESI⁺）电离，多反应监测模式（MRM）检测，内标法定量。结果表明，DMY在0~50 μg/L范围内线性关系良好，相关系数（r²）均大于0.999。方法的检出限（LOD，S/N>3）和定量限（LOQ，S/N>10）分别为2 μg/kg和10 μg/kg。不同食品基质中，DMY在10、20和100 μg/kg的添加水平下的平均加标回收率为93.3%~98.9%，相对标准偏差为1.6%~3.9%（n=6）。该方法有效补偿了液相色谱-串联质谱检测过程中的离子化抑制效应，灵敏度和准确度高，适用于腐乳、辣椒酱、禽蛋、豆干、糖果和火腿中DMY的测定。

关键词:

English

Determination of dimethyl yellow in foods by liquid chromatography-tandem mass spectrometry coupled with solid phase extraction

1.
Shanghai Entry-Exit Inspection and Quarantine Bureau, Shanghai 200135, China;
2.
Xiamen Entry-Exit Inspection and Quarantine Bureau, Xiamen 361026, China
Received Date: 19 October 2016
Fund Project:
National Key Scientific Instrument Development Project (No. 2013YQ15055705)

Abstract: A liquid chromatography-tandem mass spectrometry (LC-MS/MS) was established for the determination of dimethyl yellow (DMY) in foods. The samples spiked with D₅-dimethyl yellow (D₅-DMY) as the internal standard were extracted with ethyl acetate, cleaned up by a ProElut DMY SPE column. The separation was performed on an XDB-C18 column (50 mm×4.6 mm, 1.8 μm) with the mobile phases of 5 mmol/L ammonium acetate aqueous solution containing 0.1% (v/v) formic acid and acetonitrile containing 0.1% (v/v) formic acid. The identification and quantitation of DMY was performed by MS/MS in positive electrospray ionization (ESI⁺) and multiple reaction monitoring (MRM) mode. The quantitative analysis was carried out by internal standard method. A good linear relationship, with the correlation coefficient (r²) greater than 0.999, was found in the mass concentration range of 0-50 μg/L. The limit of detection (LOD, S/N>3) and the limit of quantitation (LOQ, S/N>10) were 2 μg/kg and 10 μg/kg, respectively. The recoveries of DMY in foods spiked with 10, 20 and 100 μg/kg varied from 93.3% to 98.9%, and the relative standard deviations (RSDs) were between 1.6% and 3.9% (n=6). The method can effectively correct the ionization suppression, and it is sensitive, accurate and suitable for the monitoring of DMY in sufu, chili sauce, egg, dried bean curd, candy and ham.

Key words:

liquid chromatography-tandem mass spectrometry (LC-MS/MS)
/ solid phase extraction (SPE)
/ internal standard method
/ matrix effect (ME)
/ dimethyl yellow (DMY)
/ foods

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沈阳化工大学材料科学与工程学院沈阳 110142

固相萃取/液相色谱-串联质谱法测定食品中二甲基黄

English

Determination of dimethyl yellow in foods by liquid chromatography-tandem mass spectrometry coupled with solid phase extraction

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固相萃取/液相色谱-串联质谱法测定食品中二甲基黄

English

Determination of dimethyl yellow in foods by liquid chromatography-tandem mass spectrometry coupled with solid phase extraction

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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