Spectrophotometric methods for the determination of impurities in pure and analytical reagents—III1The determination of six ions in KCl

Spectrophotometric Determination of Ultramicro Quantities of Calcium in KCl

“…The samples are listed by decreasing order of calcium content. Data from ref [1]. The values given are the mean of 4-5 determinations.…”

“…The samples are listed by decreasing order of calcium content. For comparison, the amounts of iron and lead found in the same samples were also copied from reference (1). The values given are the mean of 4-5 determinations.…”

“…1.00 ml reagent solution, and 0.2 ml colour developing buffer solution to 2.00 ml of the sample solution in a centrifuge tube. 1.00 ml reagent solution, and 0.2 ml colour developing buffer solution to 2.00 ml of the sample solution in a centrifuge tube.…”

“…A spectrophotometric method [1) by which six ions present in A. R. KCl were determined, serves this purpose. At the same time, sensitive analytical methods for trace impurities have to be developed.…”

“…At the same time, sensitive analytical methods for trace impurities have to be developed. A spectrophotometric method [1) by which six ions present in A. R. KCl were determined, serves this purpose. However, there are other impurities of major importance present in alkali halides not dealt with by this method.…”