二安替比林甲烷分光光度法测定功能纤维中TiO2含量

 针对功能纤维中添加TiO₂的含量测定问题,对功能纤维样品采用高温消化、混酸溶解的前处理方式,以抗坏血酸作Fe³⁺、Cu²⁺的掩蔽剂,二安替比林甲烷作为显色剂,用分光光度法在λ=390 nm波长处测定功能纤维中纳米TiO₂的含量。钛的质量浓度在0.005~0.65 mg/L范围内标准液质量浓度与吸光度呈良好的线性关系,线性方程为y=1.407 1x-0.009 3(R2=0.999),检测限为0.005 mg/L,平均回收率98%以上,RSD=0.59%。该方法简便快速,准确度高,实用性强。

Spectrophotometric determination of TiO2 in functional fiber with DAPM

To determinate the concentration of TiO₂ in functional fiber for labeling purpose,the sample was nitrified with burning and dissolved in mix acid as pretreatment and then its concentration of TiO₂ was determined by spectrophotometric method with ascorbic acid as shelter reagent of Fe³⁺ and Cu²⁺ and diantipyryl methane(DAPM) as developer at wavelength λ=(390 nm.) A good linear relationship was exhibited with the mass concentration of Ti at the range of(0.005～)(0.65 mg/L,) linear equation y=(1.407 1x)-(0.009 3)(R~2=0.999),the detection limit was(0.005 mg/L,) the average recovery ratio was above 98%,and relative standard deviation(RSD) was 0.59%.The method is simple and fast,high accuracy and practicability.