硫氰酸钠溶液中氰乙基磺酸钠的含量测定

Determination of β-SPN content in sodium thiocyanate solution

根据氰乙基磺酸钠(β-SPN)的分子结构及性质,建立了以NaOH为滴定剂,甲基红为指示剂测定NaSCN溶液中β-SPN含量的方法。结果表明,所称样品的质量与消耗的滴定剂体积差值之间具有很好的线性关系:ΔV=0.5075W-0.0325,r=0.9999;精密度实验的RSD=0.0127%:分析结果的准确度为-0.175%。该方法可靠,可用于NaSCN溶液中β-SPN含量的测定。

A method for determining β-SPN content in recoverable sodium thiocyanate solution is proposed based on molecule structure and property of cyanoethyl sodium sulfonate(β-SPN).In the experiment,NaOH is used as titrant,methyl red is used as inindicator.The linear relationship between the mass of sample and the volume difference of titration is obtained:ΔV=0.5075 W-0.0325,r=0.9999.The RSD of the precision test is 0.0127% and the accuracy is-0.175%.The method has good reliability and high repeatability.It could be used to determine β-SPN content in sodium thiocyanate solution.