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| 牛奶中蛋白质含量的示波滴定法 |
| Oscillographic Titration of Protein Content in Milk |
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| DOI：10.3969/j.issn.1671-5322.2002.02.017 |
| 中文关键词: 牛奶 蛋白质 示波滴定 四苯硼钠 氯化四乙基铵 |
| 英文关键词: Milk Protein Oscillographic titration Tetraethyl ammonium chloride |
| 基金项目: |
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| 摘要点击次数: 4534 |
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| 中文摘要: |
| 研究了牛奶中蛋白质含量的示波滴定法.样品用H2SO4-Na2SO4-CuSO4消化处理,N以NH4+的形式存在于试液中,用过量四苯硼钠沉淀铵,沉淀过滤,过量的四苯硼钠用氯化四乙基铵标准溶液返滴定,以四苯硼钠切口消失为终点,计算出氮含量,再换算为蛋白质含量.本方法终点变化敏锐,不外加指示剂,与通用的标准分析方法相比较,操作简便、快速,测定结果准确可靠,所用分析试剂无毒. |
| 英文摘要: |
| The thesis studied the new method for oscillographic titration of the determination of protein content in milk Powder. The sample was digested by a solution of H 2SO 4 Na 2SO 4 CuSO 4.Oscillographic titration is conducted on NH 4 + with Na TPB method,then calculate the nitrogen content. Compared with standard methods,choose innoxious Tetraethyl ammonium chloride titrant the above one needs no distillation absorption and indicator. It has the advantages of being easy and quick in operation,and the determination result is accurate and reliable. |
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