荧光分光光度法测定餐巾纸中荧光增白剂特定迁移量

Determination of Specific Migration of Fluorescent Whitening Agent in Napkin by Fluorescence Spectrometry

中文关键词:  荧光增白剂  荧光分光光度法  餐巾纸  特定迁移量

Key Words:fluorescent whitening agent  fluorescence spectrometry  napkin  specific migration

中文摘要:

      建立了基于荧光分光光度法对直接接触口腔的餐巾纸向蒸馏水模拟物的特定迁移量的测量方法。餐巾纸中迁移出的被分析物迁移至模拟物中，采用外标法进行定量。目标分析物在0.01～0.5 mg/L内线性关系良好（R² > 0.999）。3个加标水平（加标水平分别为25、50和100 μg）的回收率在97.9％～102.3％之间，相对标准偏差（RSD）小于8.0％， 检出限（LOD）为0.0012 mg/dm²。该方法准确、灵敏，适用于餐巾纸中荧光增白剂特定迁移量的测定。实际普查市面上10种品牌17个餐巾纸样品显示：荧光增白剂特定迁移量检出率为41.2%；荧光增白剂特定迁移量范围0～0.0061 mg/dm²。

Abstract:

      The method based on fluorescence spectrometry for specific transfer of napkins to distilled water analogue was established. The analyzed objects removed from the napkin were transferred to the analog objects and the external standard method was used to quantify. The Fluorescent whitening agent had good linear relationship （R²>0.999） between 0.01～0.5 mg/L. The recovery rates of the 3 spiked levels （25， 50 and 100 μg） were between 97.9% and 102.3%， and the detection limit was 0.0012 μg/dm² .The method was simple and rapid with high sensitivity， which was appropriate for the fast determination of the migration of fluorescent whitening agent in napkin. The census from 17 samples of 10 brands of paper napkins on the market showed that: the rate of positive sample was 41.2%， and the migration of fluorescent whitening agent in napkin was 0～0.0061 mg/dm² ．