紫外分光光度法测定中细号纯棉品种织物中二氧化钛含量

Determination of titanium dioxide content in middle and fine cotton varieties by UV spectrophotometry

4,5-二羟基-2,7-萘二磺酸配体与钛发生显色反应,生成稳定的配合物,配合物的最大吸收波长为461nm,表观摩尔吸光系数e=3.17×104L.（mol.cm-）1,钛浓度在0.001~1.0μg.mL-1范围内与吸光度呈良好的线性关系,用该方法测定纯棉品种织物中的钛。分析结果的相对标准偏差（RSD）为2.91%,加标回收率为94.57%~100.14%。

4,5-Dihydroxy-2,7-naphthalenedisulfonic acid ligands and titanium had color reaction and produced stable complexes,the maximum absorption wavelength of the complexes was 461nm,molar absorption coefficient e=3.17×104L·（mol·cm）-1,titanium concentration showed a good linear relationship,in the range of 0.001~1.0μg·mL-1 with the varieties of cotton fabric were measured in the titanium.In the results,the relative standard deviation（RSD） was 2.91%,the recovery was 94.57%~100.14%.