CAJ | 학술논문

建立了一种适用于含锌工业用水中痕量总铁测定的分光光度方法.在pH=9.00的条件下,用紫脲酸铵掩蔽Zn2+,用邻苯二酚紫与Fe2+反应生成蓝色络合物,以预先用邻菲罗啉掩蔽了Fe2+的显色体系为参比,605 nm处的吸光度与样品溶液中0.02~0.6 mg/L的Fe2+呈良好的线性关系,灵敏度约为邻菲罗啉法的5倍,检出限0.012 mg/L,加标回收率97.0%~100%,相对标准偏差1.16%.方法具有较高的灵敏度、准确度和重现性.
건립료일충괄용우함자공업용수중흔량총철측정적분광광도방법.재pH=9.00적조건하,용자뇨산안엄폐Zn2+,용린분이분자여Fe2+반응생성람색락합물,이예선용린비라람엄폐료Fe2+적현색체계위삼비,605 nm처적흡광도여양품용액중0.02~0.6 mg/L적Fe2+정량호적선성관계,령민도약위린비라람법적5배,검출한0.012 mg/L,가표회수솔97.0%~100%,상대표준편차1.16%.방법구유교고적령민도、준학도화중현성.
A spectrophotometry method suitable for the determination of trace total iron in industrial water containing Zn2+has been established.In the buffer solution when pH=9.00,murexide is used for masking Zn2+and the reaction of pyrocatechol violet with Fe2+forms a blue complex.Taking the chromagenic system whose Fe2+has been masked by phenanthroline as reference solution,it is found that there is a good linear relationship between the absorbance of 605 nm and Fe2+whose concentration is in the range of 0.02-0.6 mg/L in the sample solution.Meanwhile,the sensitivity of pyrocatechol violet spectrophotometry is about 5 times as much as that of phenanthroline spectrophotometry,detection limit is 0.012 mg/L,standard recovery rates are from 97% to 100%,and relative standard deviation is 1.16%.The results indicate that the method has superior sensitivity,accuracy and reproducibility.