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基于流动注射-光纤光谱仪联用技术研制了纺织品中游离和水解的甲醛含量测定的自动化分析系统。该系统包括萃取、显色反应、分光光度测定、数据采集与处理等4大模块。甲醛的质量浓度在0.025~3.00mg·L-1范围内与其吸光度呈线性关系,检出限(3s/k)为0.008mg·L-1。方法应用于纺织品样品的分析,测定结果与国标法测定值相符,加标回收率在94.4%~105%之间,测定值的相对标准偏差(n=7)在1.2%~1.9%之间。
Based on the combination of flow injection and fiber optic spectrometer, an automatic analysis system for the determination of free and hydrolyzed formaldehyde in textiles was developed. The system includes four modules: extraction, color reaction, spectrophotometry, data acquisition and processing. The concentration of formaldehyde in the range of 0.025 ~ 3.00mg · L-1 and its absorbance showed a linear relationship, the detection limit (3s / k) was 0.008mg · L-1. The method was applied to the analysis of textile samples. The determination results were in accordance with those of the national standard method. The recoveries were within the range of 94.4% -105%. The relative standard deviations (n = 7) of the measured values ranged from 1.2% to 1.9%.