DISCUSSION ON THE PROBLEM OF CONTAMINATION OF SAMPLES IN THE STUDY OF ORGANIC GEOCHEMISTRY
-
摘要: 一个时期以来,在生油和有机地球化学研究中,常因样品包装物问题,造成样品污染,使分析结果失真,得出错误结论。例如采用塑料袋包装的不同时代、不同深度的岩样,均得到相同的红外光谱图及族组份的反常结果。对常用包装物(如塑料袋、布袋、牛皮纸、玻璃纸等)所包装的岩样进行抽提分析,并与空矿样进行对比,发现上述包装物对样品中的可溶有机质都有严重污染,甚至改变了可溶有机质的性质、结构和组成,使岩样在生油研究中的主要参数都在生油门限值范围之内。Abstract: Samples which have been contaminated by improper packing may mislead the analytical results into false conclution.This kind of contamination was reported in foreign literature too.Obviously this problem remains prevailing and serious. Testing experiments on various packing materials indicated that adsorption is the main cause for contamination.Different packing materials have different comtamination effects on the same sample,while the same packing material also has different contamination effects on different samples.Such kind of contamination has changed the property, structure and composition of soluble organic matter in samples. For the sake of preventing samples from contamination and obtaining reliable analytical results,various kinds of packing material and dealing method are suggested.
-
[1] 刘高魁译:石油有机地球化学中的红外光谱,地质地球化学,1976年(7,8,9期). [2] 成都工学院等:高分子化学及物理学,工业出版社,1961年. -
计量
- 文章访问数: 590
- HTML全文浏览量: 73
- PDF下载量: 240
- 被引次数: 0