火焰原子吸收法测定燃料乙醇生产工艺中的钾钠钙镁

Determination of K^+, Na^+, Ca^(2+) and Mg^(2+) Content in the Production of Fuel Ethanol by Flame Atomic Absorption Spectrometry

K^+、Na^+、Ca^(2+)、Mg^(2+)的浓度不同,对酶制剂、酿酒酵母的作用效果也不同,既可起到水解及促生长的激活作用,也可具有强烈的抑制作用。常规火焰原子吸收法测定这4种金属离子,存在电离干扰及共存离子的抑制,影响测定结果的准确性。本文通过在待测试样中,加入消电离剂和释放剂配成的混合溶液,消除干扰降低抑制;经检测验证,取得了理想的实验效果。该方法简单快捷,可为燃料乙醇生产的发酵工艺提供科学数据,进一步指导生产。

Different concentration of K^＋, Na^＋, Ca^2＋ and Mg^2＋ has different effects on zymin and yeast, which could activate or inhibit strongly hydrolysis and proliferation. Conventionally, the concentration of the four metal ions is detected by flame atomic absorption spectrometry. The ionization interference and the inhibition of coexisting ions may influence the detection accuracy. In this study, adding the mixed solution of ionization agent and release agent in the samples could eliminate the interference and reduce the inhibition.Experimental data showed that satisfactory detection results were obtained. This method was simple and fast and could be used to guide the production.