气相色谱-串联质谱法考察茶汤中49种农药的迁移规律
Investigation of Migration Regularity of 49 Pesticides in Tea Infusion by GC-MS/MS
摘 要
采用气相色谱-串联质谱法测定茶叶浸泡茶汤中49种农药含量，通过公式计算农药的迁移率，考察农药的迁移率与农药的溶解度、迁移率与其在正辛醇-水中的分配系数（logKow）之间的关系。结果表明：茶叶浸泡后农药迁移率范围，第一汤在82.4%以内，第二汤在16.1%以内，第一汤中农药的迁移率较高；茶汤中农药的总迁移率与其在水中的溶解度呈正相关（Pearson相关系数为0.743；P<0.01），差异有统计学意义；与农药在辛醇-水中的分配系数呈负相关（Pearson相关系数为-0.984；P<0.01），差异有统计学意义。因此，茶叶浸泡后第一汤中农药迁移率较高，饮茶时建议弃掉第一汤，以减少茶汤引起的农药暴露；种植茶叶过程中推荐使用水中溶解度低且分配系数较高的农药。
茶汤
农药
迁移率
溶解度
分配系数
GC-MS/MS
tea infusion
pesticide
migration rate
solubility
distribution coefficient
Abstract
The 49 pesticides in tea infusion were determined by GC-MS/MS, then values of migration rate of pesticides were calculated by formula. Relationships between migration rate and solubility of pesticides, and between migration rate of pesticides and distribution coefficient (LogKow) in n-octyl alcohol-water was studied. The results showed that the range of migration rate of pesticides after tea soaking:the first soup was within 82.4%, the second soup was within 16.1%, and the migration rate of pesticides in the first soup was relatively high. The total migration rate of pesticides in tea soup was positively correlated with solubility in water (Pearson correlation coefficient was 0.743, P<0.01), the difference was statistically significant; and the total migration rate of pesticides in tea soup was negatively correlated with distribution coefficient in n-octyl alcohol-water (Pearson correlation coefficient was -0.984, P<0.01); the difference was statistically significant. Therefore, the migration rate of pesticides in the first soup after tea soaking was relatively high, so it was suggested to drop the first soup when drinking tea to reduce the pesticide exposure caused by tea infusion. Pesticides with low solubility in water and high distribution coefficient were recommended for tea planting.
中图分类号 O657.7 DOI 10.11973/lhjy-hx202009006
所属栏目 工作简报
基金项目 贵阳市高层次创新型青年卫生人才培养计划项目（[2018]筑卫计科技合同字第023号）
收稿日期 2020/4/1
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备注李海畅,主管技师,硕士,研究方向为理化检验技术,269363331@qq.com
引用该论文: LI Haichang,DAI Hua,GU Qiang,LI Lei. Investigation of Migration Regularity of 49 Pesticides in Tea Infusion by GC-MS/MS[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2020, 56(9): 970～978
李海畅,代华,顾强,李磊. 气相色谱-串联质谱法考察茶汤中49种农药的迁移规律[J]. 理化检验－化学分册, 2020, 56(9): 970～978
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参考文献
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【5】WANG J, CHEUNG W, LEUNG D. Determination of pesticide residue transfer rates (Percent) from dried tea leaves to brewed tea[J]. Journal of Agricultural and Food Chemistry, 2014,62(4):966-983.
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【7】XIAO J J, LI Y, FANG Q K, et al. Factors Affecting transfer of pyrethroid residues from herbal teas to infusion and influence of physicochemical properties of pesticides[J]. International Journal of Environmental Research and Public Health, 2017,14(10):1157-1169.
【8】PARADA A P, GONZALEZ J, PAREJA L, et al. Transfer of pesticides to the brew duringmate drinking process and their relationship with physicochemical properties[J]. Journal of Environmental Science and Healthy:Part B, 2010,45(8):796-803.
【9】黄宝勇,肖志勇,欧阳喜辉.贮存温度条件对蔬菜基质中农药残留稳定性的影响[J].农产品质量与安全, 2013(2):48-51.
【10】刘海萍,王伟,马小爽,等.有机氯农药质控环境标准样品稳定性[J].环境化学, 2016,35(11):2279-2286.
【2】CHEN H P, PAN M L, PAN R, et al. Transfer rates of 19 typical pesticides and the relationship with their physicochemical property[J]. Journal of Agricultural and Food Chemistry, 2015,63(2):723-730.
【3】李海畅,王玉红,邹云云,等.茶浸泡液中农药残留检测及去除方法[J].现代预防医学, 2018,45(10):55-60.
【4】钱承敬,史晓梅,谢云峰,等.气相色谱-串联质谱法测定茶叶茶汤中多种农药残留量[J].食品安全质量检测学报, 2017,8(8):390-402.
【5】WANG J, CHEUNG W, LEUNG D. Determination of pesticide residue transfer rates (Percent) from dried tea leaves to brewed tea[J]. Journal of Agricultural and Food Chemistry, 2014,62(4):966-983.
【6】CHO S K, EL-ATY A M A, RAHMAN M M, et al. Simultaneous multi-determination and transfer of eight pesticide residues from green tea leaves to infusion using gas chromatography[J]. Food Chemistry, 2014,165:532-539.
【7】XIAO J J, LI Y, FANG Q K, et al. Factors Affecting transfer of pyrethroid residues from herbal teas to infusion and influence of physicochemical properties of pesticides[J]. International Journal of Environmental Research and Public Health, 2017,14(10):1157-1169.
【8】PARADA A P, GONZALEZ J, PAREJA L, et al. Transfer of pesticides to the brew duringmate drinking process and their relationship with physicochemical properties[J]. Journal of Environmental Science and Healthy:Part B, 2010,45(8):796-803.
【9】黄宝勇,肖志勇,欧阳喜辉.贮存温度条件对蔬菜基质中农药残留稳定性的影响[J].农产品质量与安全, 2013(2):48-51.
【10】刘海萍,王伟,马小爽,等.有机氯农药质控环境标准样品稳定性[J].环境化学, 2016,35(11):2279-2286.
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