Evaluation of laboratory comparison results of GC and GC-MS in petroleum geology industry

Abstract

In order to learn about the detection capability of GC (gas chromatography) and GC-MS (gas chromato-graphy-mass spectrometry) laboratories in the petroleum geology industry of China, improve the detection level of the laboratories and promote inter-industry exchanges, the Standardization Committee of Petroleum Geological Exploration organized a comparison study among the petroleum geology laboratories throughout the country. A total of 23 laboratories participated in this study. Total hydrocarbons, saturated hydrocarbon and aromatic hydrocarbon samples were selected, and the experimental method was specified according to relevant standards. The data quality of each laboratory was evaluated using the quartile robust statistical method. The results show that the data of the laboratories are stable and reliable, and the analysis results have good repeatability and reproducibility. The qualification rate of total hydrocarbons light hydrocarbon ratio parameters of GC is 95%, and the qualification rate of saturated hydrocarbon and aromatic hydrocarbon parameters is 97%. The qualification rate of saturated hydrocarbon parameters of GC-MS is 100%, and the qualification rate of aromatic parameters is 95%. The overall satisfaction rate is high. The main reasons for the problematic data and outliers of relevant parameters of some laboratories are the storage conditions, storage time, instrument model, test method, personnel operation errors, etc. It is suggested that the laboratories should strengthen quality control measures to further improve the GC and GC-MS detection capabilities.

Keywords

• gc-ms
• gc
• total hydrocarbons
• saturated hydrocarbon
• aromatic hydrocarbon
• comparison results