痕量阴离子
chloride (Cl-): ≤0.001%sulfate (SO42-): ≤0.005%
痕量阳离子
Ca: 0.005%Fe: ≤0.002%K: 0.002%Mg: 0.001%Na: 0.005%heavy metals: ≤0.001% (by ICP-OES)
Sigma-Aldrich西格玛奥德里奇(上海)贸易有限公司
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