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作者采用四氯化碳萃取水样中铍与乙酰丙酮形成的络合物,然后将铍反萃取到6mol/L盐酸中,加高氯酸消化至干并溶于0.1mol/L盐酸,再于NH_3-NH_4 Cl-EDTA-铍试剂Ⅲ-抗坏血酸底液进行示波极谱测定。方法的线性范围为0.2～100ppb,对水样的最低检出浓度为2ppt,变异系数为2.5～10.4％,回收率为95.2～102.4％。本法准确,重现性好,灵敏度高,抗干扰能力强。
The authors used carbon tetrachloride extraction of water sample beryllium and acetylacetone complex formation, and then beryllium stripped 6mol / L hydrochloric acid, plus perchloric acid to dry and dissolved in 0.1mol / L hydrochloric acid, and then in NH_3-NH_4 Cl-EDTA-beryllium reagent Ⅲ-ascorbic acid bottom solution for oscillopolarographic determination. The linear range of the method was 0.2 ~ 100ppb, the minimum detectable concentration was 2ppt, the coefficient of variation was 2.5 ~ 10.4% and the recovery was 95.2 ~ 102.4%. This law is accurate, reproducible, high sensitivity, anti-interference ability.