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欧洲药典附录2.5.8芳伯氨基氮的测定

专业英语

  • 2.5.8 Determination of primary aromatic amino-nitrogen

    芳伯氨基氮的测定



    Dissolve the prescribed quantity of the substance to be examined in 50 ml of dilute hydrochloric acid R or in another prescribed solvent and add 3 g of potassium bromide R. Cool in ice-water and titrate by slowly adding 0.1 M sodium nitrite with constant stirring.

    Determine the end-point electrometrically or by the use of the prescribed indicator.

    将规定数量的待测样品溶于50ml稀盐酸或其它规定的溶剂中,加3g溴化钾。在冰浴中冷却后用0.1M的亚硝酸钠滴定液慢速滴定,随滴随搅拌。采用电位法或规定的指示剂指示终点。
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  • 影子

    第1楼2011/07/06

    不知道有谁做过这种测定没有?现在有个问题想请教大家:如果想采用指示剂指示终点,应该选择什么指示剂?

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  • poorlittle

    第2楼2011/07/06

    If hydrochloric acid R is different from hydrochloric acid, it should be translated precisely. Similar to potassium bromide R..

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  • 影子

    第3楼2011/07/06

    嗯,这样翻译是欠妥了,欧洲药典中关于稀盐酸有以下几种:

    Hydrochloric acid, dilute. 1043503.

    Contains 73 g/l of HCl.

    Dilute 20 g of hydrochloric acid R to 100 ml with water R.

    Hydrochloric acid, dilute R1. 1043504.

    Contains 0.37 g/l of HCl.

    Dilute 1.0 ml of dilute hydrochloric acid R to 200.0 ml with water R.

    Hydrochloric acid, dilute R2. 1043505.

    Dilute 30 ml of 1 M hydrochloric acid to 1000 ml with water R; adjust to pH 1.6 ± 0.1.
    这样看来这里的hydrochloric acid R应该是指第一种了

    中国药典的稀盐酸:取盐酸234ml,加水稀释至1000ml,即得。本液含HCl应为9.5%~10.5%。

    那么在翻译主题贴时,是不是应该写成“稀盐酸(含73 g/l HCl)”?

    poorlittle(poorlittle) 发表:If hydrochloric acid R is different from hydrochloric acid, it should be translated precisely. Similar to potassium bromide R..

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