引用本文:
【打印本页】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 58次   下载 51 本文二维码信息
码上扫一扫!
分享到: 微信 更多
气相色谱法测定化妆品用原料聚乙烯醇中甲醇含量
杨 铭, 张丽华, 胡 丹, 王晨蕾, 任承方
浙江方圆检测集团股份有限公司,浙江 杭州 310018
摘要:
建立了气相色谱法测定化妆品用原料聚乙烯醇(固体)中甲醇含量的方法。研究发现顶空法较蒸馏法、直接稀释法更适合用于测定化妆品用原料聚乙烯醇中甲醇含量。分别考察了溶剂和盐析剂对测定结果的影响,发现最佳的溶剂和盐析剂分别为10 mL水和0.5 g氯化钠。结果表明甲醇质量浓度在10~1 000 mg/L范围内线性关系良好,相关系数可达0.999 5,其回收率为92.6%~104.8%,相对标准偏差(RSD)在1.2%~6.5%之间,检出限为5 mg/L。实验结果证明,该方法适用于化妆品用原料聚乙烯醇中甲醇含量的检测。
关键词:  化妆品原料  聚乙烯醇  顶空气相色谱  甲醇
DOI:10.13218/j.cnki.csdc.2018.06.010
分类号:
基金项目:
Determination of methanol in polyvinyl alcohol used in cosmetics by gas chromatography
Abstract:
A gas chromatography method was established for the determination of methanol in polyvinyl alcohol used in cosmetics. It is found that headspace method is more suitable than distillation method and direct dilution method to determine the methanol in polyvinyl alcohol used in cosmetics. The factors of solvent and salting-out agent were investigated and the appropriate conditions are 10 mL water and 0.5 g sodium chloride, respectively. Results indicate that the linear relationship of methanol in the range of 10-1 000 mg/L is good, with correlation coefficient of 0.999 5. The recoveries are ranged from 92.6% to 104.8%, while the relative standard deviations (RSD) are ranged from 1.2% to 6.5% and the detection limit is 5 mg/L. The results prove that this method is suitable for the determination of methanol in polyvinyl alcohol used in cosmetics.
Key words:  ?cosmetic ingredients  polyvinyl alcohol  headspace gas chromatography  methanol

用微信扫一扫

用微信扫一扫