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鋰的测定除火焰光度法外,可采用钍试剂在鹼性溶液中和鋰形成黄色络合物而进行分光光度法测定,或利用高铁过碘酸鉀在鹼性溶液中与鋰生成黄色KLi[FelO_6]溶于HCI,后用硫氰酸盐比色法测定铁量,间接计算鋰量,前法干扰离子较多,误差较大,后法Na~+,Mg~(++)等离子严重干扰,如能将Na~+,Mg~(++)离子分离,即可应用于低温盐中鋰的测定。本文目的在研究低温盐中Na~+与Mg~(++)离子的除去和沉淀的适
Determination of lithium In addition to flame photometry, the thorium reagent can be used in alkaline solution and lithium to form a yellow complex for spectrophotometric determination, or the use of high-iron potassium periodate in alkaline solution with lithium to generate yellow KLi [ FeO_6] was dissolved in HCI, and the amount of iron was measured by thiocyanate colorimetric method. The amount of lithium was calculated indirectly. The former method had more interfering ions and the larger error. The Na ~ +, Mg ~ (++) , If Na ~ +, Mg ~ (++) ions can be used in the determination of low-temperature salt of lithium. The purpose of this paper is to study the removal and precipitation of Na ~ + and Mg ~ (++) ions in cryogenic salt