DETERMINATION OF Cr~(3+) AND Cr~(6+) IN NATURAL WATER BY GRAPHITE FURANCE ATOMIC ABSORPTION SPECTROMETRY WITH METAL CHELATE COPRECIPITATION

• 用DDTC-Mn~(2+)共沉淀分离无火焰原子吸收测定天然水中痕量Cr~(3+)和Cr~(6+)