單項選擇題二乙基二硫代氨基甲酸銀分光光度法測定水中砷時,金屬()干擾測定。
A.鉻和鈷
B.錫和鉍
C.汞和銀
D.銻和鉍
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1.單項選擇題二乙基二硫代氨基甲酸銀分光光度法測定水中砷,當(dāng)試樣取最大體積50ml、用10mm比色皿時,可檢測水中砷的上限濃度為()mg/L,最低檢出濃度為()mg/L。
A.0.10,0.001
B.0.30,0.003
C.0.50,0.007
D.0.70,0.005