指标名称 | 规格 | 指定级 | ||
优级纯 | 分析纯 | 化学纯 | ||
含量≥ | 99.5 | 99.0% | 98.5% | 根据客户要求定做
|
pH(50g/L溶液,25℃) | 6.0~8.0 | 6.0~8.0 | 6.0~8.0 | |
澄清度试验,号≤ | 2 | 3 | 5 | |
水不溶物≤ | 0.005 | 0.01 % | 0.02% | |
氯化物及溴化物≤ | 0.01 | 0.02 % | 0.05% | |
碘酸盐及碘≤ | 0.0003 | 0.002 % | 0.005% | |
总氮量≤ | 0.001% | 0.002% | 0.002% | |
磷酸盐 | 0.001% | 0.002% | ------- | |
硫酸盐≤ | 0.002% | 0.005% | 0.01% | |
钠≤ | 0.05% | 0.1% | ------- | |
镁≤ | 0.001% | 0.002% | 0.005% | |
钙≤ | 0.001% | 0.002% | 0.005% | |
铁≤ | 0.0001% | 0.0003% | 0.0005% | |
砷≤ | 0.00001% | 0.00002% | ------- | |
重金属≤ | 0.0002% | 0.0005% | 0.001% | |
钡≤ | 0.001% | 0.002% | 0.004% | |
还原性物质 | 合格 | 合格 | ------- | |
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