【摘要】 研究了磺基水杨酸（SSA）与钛、铁同时显色反应及测定的适宜条件。试验结果表明,在pH2～3的邻苯二甲酸氢钾-盐酸缓冲液中,SSA与钛、铁可形成稳定有色配合物,以500nm为SSA—Fe配合物的测定波长,采用365/560nm为SSA—Ti配合物测定波长对,钛量在0～22μg/25ml,铁量10～200μg/25ml符合比耳定律,配合物的表观摩尔吸光系数ε_Ti为2.0×10⁴,ε_Fe为3.0×10³,方法简便、快速、结果良好。更多还原

【Abstract】 It is found that in a buffer solution of pH 2³, sulfosalicylic acid （SSA） reacts with Ti （ Ⅳ ） and Fe （ Ⅲ ） simultaneously to form corresponding complexes of Ti-SSA and Fe-SSA. Absorbance of Fe-SSA is measured at 500nrn. Titanium is determined by DW-spectrophotometry using the wavelength of 365nm/560nm. Concentration range for determination of Ti is between 0 ²2μg/25ml, and for determination of Fe is between 10²00μg/25ml. The apparent absorptivi ties are ε_Ti = 2×10⁴L ·mol^-1 ·cm^-1 and ε_Fe=3.0×10³L ·mol^-1 ·cm^-1 respectively. The proposed method has been applied to the analysis of aluminum alloys. The method proves to be simple, rapid and accurate.更多还原