單項(xiàng)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)試取最大體積50ml、用10mm比色皿時(shí),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.0.07,0.005


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