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含有氯离子与溴离子的样品,用一般方法是很难予以分离和测定的。如采用气相色层法,则可获得快速而准确的结果。微量至0.1ppm的氯化物(溶于蒸馏水中),也可以用3毫升的样品予以测定。测定时,将样品放入70%硫酸中(这一浓度可以迅速分离溴化氢而不致将它氧化成为溴),氯离子与溴离子即转变成为共价的氯化氢与溴化氢,用氦气将它们冲入液氮捕集器,于-78℃时在甲苯-正庚烷柱中,
Samples containing chloride and bromide ions are difficult to isolate and determine by conventional methods. If using gas chromatography, you can get fast and accurate results. Trace amounts to 0.1 ppm of chloride (dissolved in distilled water) can also be measured with 3 ml of sample. When measured, the sample is placed in 70% sulfuric acid (at a concentration that rapidly separates hydrogen bromide without oxidizing it to bromine), converting chloride and bromide ions into covalent hydrogen chloride and hydrogen bromide, using helium They were flushed into a liquid nitrogen trap at -78 ° C in a toluene-n-heptane column,