染整技术2026，Vol.48Issue(1)：40-42,3.
超声萃取-酶解-树脂/活性炭吸附-分子质量校正联用测定洗衣片中聚乙烯醇(PVA)含量的研究
Research on the determination of polyvinyl alcohol(PVA)content in laundry sheets by combined use of ultrasonic extraction,enzymatic hydrolysis,resin/activated carbon adsorption and molecular mass correction
吴吉远 1黄志成 1文水平 2朱牧野2
作者信息
- 1. 佛山市魔晶科技发展有限公司,广东 佛山 528329
- 2. 广东职业技术学院,广东 佛山 528041
- 折叠
摘要
Abstract
To address the complex matrix interference of polyvinyl alcohol(PVA)in laundry sheets,a high-preci-sion and high-sensitivity spectrophotometric detection method was established by integrating an ultrasonic extraction,enzy-matic hydrolysis,resin/activated carbon adsorption,molecular weight correction combined strategy.The interference was sig-nificantly eliminated by optimizing the boric acid-iodine colorimetric system(mass ratio of potassium iodide to iodine 1.38∶1.00,detection wavelength 688 nm),and combining the targeted degradation of polysaccharides by amylase/cellulase,ad-sorption of surfactants by anion exchange resin,and decolorization by activated carbon.To correct the absorbance deviation caused by the molecular weight effect difference of PVA,a multi-standard curve correction method was proposed,reducing the detection error of mixed samples from±25%to±5%.The method has a linear range of 0-50 mg/L(R2≥0.999 1),with a recovery rate of 95.50%-104.95%and a relative standard deviation(RSD)of≤1.50%,providing technical support for the precise quantification of PVA in multi-component laundry sheets.关键词
洗衣片/聚乙烯醇/分光光度法/酶解/树脂/活性炭吸附/分子质量效应Key words
laundry sheets/polyvinyl alcohol/spectrophotometry/enzymatic hydrolysis/resin/activated carbon ad-sorption/molecular mass effect分类
轻工纺织引用本文复制引用
吴吉远,黄志成,文水平,朱牧野..超声萃取-酶解-树脂/活性炭吸附-分子质量校正联用测定洗衣片中聚乙烯醇(PVA)含量的研究[J].染整技术,2026,48(1):40-42,3.
