Ziółkowska Dorota, Syrotynska Iryna, Shyichuk Alexander, Lamkiewicz Jan
Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, Seminaryjna 3, 85-326 Bydgoszcz, Poland.
Biochemistry Department, Ivano-Frankivsk National Medical University, Halyts'ka 2, 76000 Ivano-Frankivs'k, Ukraine.
Molecules. 2021 May 5;26(9):2716. doi: 10.3390/molecules26092716.
The method of colloid titration with poly(diallyldimethylammonium) chloride has been improved to detect the endpoint with an off-vessel light reflectance sensor. The digital color sensor used measures light reflectance by means of light guides, with no immersion into the reaction solution. In such a method, the optical signal is free of disturbances caused by sticky flocs in the solution. The improved automatic titration set was applied for the determination of sodium laureth sulfate (SLES) in industrial batches and commercial personal care products. The sample color and opacity do not disturb the SLES quantification. When the SLES content lies in the range from 5% to 9%, the optimal sample weight is from 6 g to 3 g.
采用聚二烯丙基二甲基氯化铵进行胶体滴定的方法已得到改进，可使用非浸入式光反射传感器检测终点。所使用的数字颜色传感器通过光导测量光反射率，无需浸入反应溶液中。在这种方法中，光信号不受溶液中粘性絮凝物引起的干扰。改进后的自动滴定装置用于测定工业批次和商业个人护理产品中的月桂醇聚醚硫酸酯钠（SLES）。样品的颜色和不透明度不会干扰SLES的定量分析。当SLES含量在5%至9%范围内时，最佳样品重量为6 g至3 g。
