【摘要】 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。更多还原

【Abstract】 Automatic analyzer used for determination of free formaldehyde and formaldehyde as hydrolysate in textiles was fabricated based on the use of the techniques of flow injection and optical-fibre spectroscope in combination.The analyzer was composed of 4 modules,i.e.extraction,color reaction,spectrophotometric measurement and data processing.Linear relationship between values of absorbance and mass concentration of formaldehyde was obtained in the range of 0.025-3.00mg·L-1,with detection limit(3s/k)of 0.008mg·L-1.The proposed method was applied to the analysis of textile samples,giving results in consistency with those obtained by GB method,and values of recovery found by standard addition method were in the range of 94.4%-105% with RSD′s(n=7)in the range of 1.2%-1.9%.更多还原