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本文主要通过研究色谱条件、萃取条件、方法的检测下限、回收率、重复性等内容,确定了利用高效液相色谱-二极管阵列检测器法测定纺织品中5种荧光增白剂(C.I.荧光增白剂71、85、199∶1、351、393)含量的最佳测试方法,即:检测波长为360 nm,由乙腈和乙酸铵溶液为流动相梯度洗脱,萃取溶剂为水+N,N-二甲基甲酰胺(DMF)(40+60),萃取溶剂体积为25 m L,超声萃取时间为30 min,萃取温度为60℃,5种荧光增白剂在0.1~50 mg/L浓度范围内的线性相关系数r为0.999 3~0.999 9,检测低限为0.5~2.5 mg/kg,不同添加水平时,回收率为83.5%~102.8%,相对标准偏差为2.1%~5.4%。该方法具有简便、快速、准确的优点,适用于纺织品中荧光增白剂的检测。
In this paper, the determination of five kinds of optical brighteners (CI fluorescent whitening agent) in textiles by high performance liquid chromatography-diode array detector method was studied mainly through the study of chromatographic conditions, extraction conditions, detection limit of the method, recovery and repeatability. Agent 71,85,199:1,351,393) content of the best test method, namely: detection wavelength of 360 nm, acetonitrile and ammonium acetate solution as a mobile phase gradient elution solvent extraction water + N, N- Dimethylformamide (DMF) (40 + 60), volume of extraction solvent was 25 mL, ultrasonic extraction time was 30 min, extraction temperature was 60 ℃, and the concentration of five fluorescent whitening agents in the range of 0.1-50 mg / L The linear correlation coefficient r was 0.999 3 ~ 0.999 9, and the detection limit was 0.5 ~ 2.5 mg / kg. The recoveries were 83.5% -102.8% with relative standard deviations of 2.1% -5.4%. The method has the advantages of simplicity, speed and accuracy and is suitable for the detection of optical brighteners in textiles.