| 硫化物标准溶液的配制及其稳定性研究 |
| 摘要点击 2343 全文点击 3056 修订日期：1993-08-31 |
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| 中文关键词 硫化物 标准溶液 配制方法 稳定性 |
| 英文关键词 sulfide standard solution solutionpreparation method solution stability |
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| 中文摘要 |
| 采用在碱性条件下加入乙酸锌-乙酸钠溶液形成硫化锌沉淀的形式配制硫化物标准溶液,可使其稳定保存。溶液酸度、水中溶解氧、痕量重金属离子存在、乙酸锌-乙酸钠纯度及光照射等因素,对硫化物标准溶液的稳定性有较大影响。实验结果表明:采用去离子除氧水、控制pH=10-12、对乙酸锌-乙酸钠进行提纯等方法配制的硫化物标准使用液,室温下至少可稳定保存2个月,浓度基本不变。 |
| 英文摘要 |
| A method for prefering a stancers sulfide solution has been established by examining the following variables: form of sulfide precipitatioll, effects of trace heavy metals,dissolved oxygen level in watet,acidity of solution, purity of zinc aceests-sodium acetate, and effect of irradiation. The stability of such a standard sulfide solution was also diSCussed. A standard sulfide solution prepeted by be method can be kept stable for at lean 2 months in the range Of 1.0-50μg S2-/ml. |
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