Modification of spectrophotometer and its application in determination of antimony
CHEN Zhen-e1,MA Chao2,ZHANG Hai1
1.School of Chemistry and Chemical Engineering,Qianbei Featured Resources Applied Research Laboratory,Zunyi Normal College,Zunyi 563002,China; 2.Hunan Chenzhou Mining Limited Liability Company,Huaihua 419607,China
Abstract：The sample was decomposed with sulfuric acid. After adding potassium iodide into sulfuric acid (1+4), Sb3+would react with potassium iodide to form yellow [SbI4]- complex. The absorbance was measured on a modified spectrophotometer, and the rapid determination method of antimony was established. Beer's law was obeyed for Sb3+ in range of 0-250 μg. The regression equation was y=0.945 6 x+0.002 3 with correlation coefficient of r=0.999 7. The proposed method was applicable for the determination of antimony in sample with content lower than 1.00%. The content of antimony in different geological samples was determined according to the experimental method. The relative standard deviations (RSD, n=6) were between 2.1% and 6.8%. The found results were consistent with those obtained by national standard method (GB/T 15925-2010) as well as unmodified spectrophotometer and visual colorimetry.
陈珍娥，马超，张海. 分光光度计的改装及在锑测定中的应用[J]. 冶金分析, 2017, 37(5): 77-81.
CHEN Zhen-e,MA Chao,ZHANG Hai. Modification of spectrophotometer and its application in determination of antimony. , 2017, 37(5): 77-81.
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