不同色谱法检测尾气洗涤塔有机组分的对比与分析

Comparison and Analysis of Chromatography for the Determination of OrganicComponents of Exhaust Gas Washing Towers

研究乙醇酸甲酯精馏塔中不凝气脱盐水喷淋洗涤后,水中吸收的低沸点有机组分及其含量的测定方法。分别建立了气相色谱仪和顶空-气相色谱仪的测定方法,对比分析两种测试方法的原理、测试步骤、结果的准确度和精密度。结果表明,采用两种方法测定的标准样品和实际样品的结果都能很好地满足化工生产中间控制分析的及时性和准确性要求。从分析结果的准确度、精密度和实际经济效益考虑,顶空-气相色谱仪较气相色谱仪有更大的优势。

The non-condensing gas in the distillation column of the refining unit produced by methyl glycolate process was analyzed and the low boiling point organic solvent components and their contents in the water were determined after being sprayed and washed by desalting water in the tail gas absorption tower.The principle,steps,accuracy and precision of the two methods were compared and analyzed by using gas chromatograph and headspace-gas chromatograph.The results show that both the standard sample and the real sample determined by the two methods can meet the requirements of timeliness and accuracy of the intermediate control analysis in chemical production.The headspace-gas chromatograph has more advantages than the gas chromatograph considering the accuracy,precision and actual economic benefit of the analysis results.