气相色谱-质谱法分析市售豆芽中生长调节剂

Analysis on Growth Regulator in Bean Sprout by GC-MS Method

[目的]用合适的方法分析测定市售豆芽中的生长调节剂残留.[方法]以常州地区市售豆芽为研究对象,利用气相色谱-质谱联用法,研究了其中4-氯苯氧乙酸（PCPA）、2,4-二氯苯氧乙酸（2,4-D）2种生长调节剂的残留情况.[结果]检测结果表明,豆芽菜中含有大量的4-氯苯氧乙酸,但不同来源的豆芽中这2种物质的含量波动较小,而2,4-D未检出.试验用气相色谱-质谱联用法测定目标物质的回收率达到82.65％ ～ 100.53％,相对标准偏差均小于15％.[结论]研究表明,生长调节剂残留是豆芽菜安全控制的主要对象.

[Objective] To analyze growth regulator residue in bean sprout by appropriate method.[Method] With bean sprout in Changzhou as study object,using GC-MS method,the residue of PCPA and 2,4-D was studied.[Result] The detection results showed that,bean sprout contains a large amount of PCPA,the fluctuation of the two materials in bean sprouts from different places is small,2,4-D was not detected.The recovery rate of the target materials is up to 82.65％-100.53％,the RSD is less than 15％.[Conclusion] The growth regulator residue is the main object for controlling safety of bean sprout.