论文部分内容阅读
利用分光光度法研究了O/W型微乳液Triton X-100/n-C5H11OH/n-C9H20/H2O与氯代-1-丁基-3-甲基咪唑离子液体协同对结晶紫-磷钼杂多酸显色体系的增敏作用。在18℃下,通过实验确定了反应的最大吸收波长;显色反应的稳定时间;微乳液和离子液体的体积比及微乳液和离子液体混合液的用量;显色体系的酸度;钼酸铵、结晶紫的用量。在较佳显色条件下,绘制了标准工作曲线,得到的线性回归方程为y=0.171 9x-0.006 1,摩尔吸光系数为1.3×105L/(mol·cm),比单一微乳液中摩尔吸光系数提高了40%。用等摩尔系数法测得磷钼杂多酸与结晶紫缔合比为3∶7,方法的检出限为4×10-6g/L。对5种标准钢样中磷质量分数进行测定,其相对标准偏差均小于3%。通过测定结晶紫的分配系数初步探讨了反应机理。
The effects of Triton X-100 / n-C5H11OH / n-C9H20 / H2O and 1-butyl-3-methylimidazolium ionic liquid O / W microemulsion on the crystal violet- Sensitizing effect of polyacid color system. The maximum absorption wavelength of the reaction was determined experimentally at 18 ° C .; the stabilization time of the color reaction; the volume ratio of the microemulsion to the ionic liquid and the amount of the mixed liquor of the microemulsion and the ionic liquid; the acidity of the color system; , The amount of crystal violet. Under the condition of better color rendering, the standard working curve was drawn. The linear regression equation was y = 0.171 9x-0.006 1, the molar absorption coefficient was 1.3 × 105 L / (mol · cm), which was lower than that of single microemulsion Increased by 40%. The equimolar coefficient method is used to determine the association ratio of phosphomolybdic heteropolyacid to crystal violet is 3: 7. The detection limit of this method is 4 × 10-6g / L. The relative standard deviations of 5 kinds of standard steel samples were all less than 3%. The reaction mechanism was preliminarily studied by measuring the partition coefficient of crystal violet.