液相色谱-串联质谱法分析爆米花桶水浸泡液中的荧光增白剂

Analysis of Fluorescent Substance Migration of Popcorn Cup by Liquid Chromatography-tandem Mass Spectrometry Method

关键词:  液相色谱-串联质谱法  荧光增白剂  爆米花桶  迁移

Key Words:liquid chromatography-tandem mass spectrometry  fluorescent brightener  popcorn cup  migration

摘要:使用液相色谱-串联质谱（LC-MS）的方法测试了市面的爆米花桶中荧光增白剂的种类和含量，实验选用VBL、APC、 SPP、 APH 4种荧光增白剂作为目标化合物,在信噪比为10（S/N=10）的条件下，4种荧光增白剂的检出限均小于10 ng/mL，相对标准偏差（RSD）<10%。实验初步表明，本次上海地区含荧光增白剂的爆米花桶中添加的荧光增白剂均为APC，可迁移量从0.653 mg/kg到23.166 mg/kg不等。该方法可以有效分离荧光增白剂，并对其进行定性定量判定。

Abstract:This experiment use liquid chromatography-tandem mass spectrometry (LC-MS) to test the type and content of the fluorescent substance in the popcorn cups in the market. VBL, APC, SPP, APH four fluorescent brighteners were identified as the target compound. 10 times of the signal-to-noise ratio was used to confirm the detection limit, and all fluorescent brighteners’ limits were less than 10 ng /mL, the method precision (RSD) was <10%. It proved that the fluorescent substances added in the examined popcorn cups were APC. The migration amounts ranged from 0.653 mg/kg to 23.166 mg/kg. The method can effectively separate the fluorescent substance and further be defined qualitatively and quantitatively.