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气相色谱法测定CO_2具有灵敏、快速、准确分辨率高的特点,尤其是检测微量CO_2的能力更优于其他方法。 矿石中CO_2的气相色谱测定常采用热解和酸分解二种方法,通过实践和验证,证实酸分解法所得结果准确,热解法的结果常有偏高倾向,因此,我们用热解法同时测定CO_2和H_2O~+时,凡CO_2的结果大于0.3％者,均用酸分解法进行复检(只要用200目的样品,就可排除酸分解不完全所造成偏低的现象)。
The determination of CO_2 by gas chromatography is sensitive, rapid and accurate, and its ability to detect CO_2 is better than other methods. Oxygen gas chromatography CO_2 often used pyrolysis and acid decomposition of two methods, through practice and verification, confirmed the results obtained by acid decomposition method accurate, the results of the pyrolysis method tends to be high, so we use the pyrolysis method Determination of CO_2 and H_2O ~ +, where the results of more than 0.3% of CO_2, were acid-based method of re-examination (as long as the 200-mesh sample can be ruled out incomplete acid decomposition caused by the phenomenon of low).