| Many nation-stated geological exploration labs have completed large-scale regional geochemical exploration, making great contributions to the exploration of mineral resources of our country. In particular, recently our analysis lab has made progress in regional geochemical exploration. For instance, the assessment of the national regional geochemical exploration conducted on the scale of1:200000indicates there are problems with the sample grade of the Northeast and the Northwest thus, thus a new sampling method is proposed. The results of early stream sediment surveys suggest item analyses are limited and there are evident systematic errors. As indicated by recent results, the previous sample grade selection is unreasonable and problematic. This quality management pattern focuses on five elements:Manpower, Machine, Material, Method and Environment, so it is considered as an extensive pattern of lab quality management.Thanks to the boom of new technologies, the lab quality management has undergone a qualitative leap. The analysis-process-oriented quality control is attracting more attention. The technology of measuring indeterminacy in the field of mathematical statistics has found wide application in the quality control of analysis process for the purpose of ensuring a reliable and steady system and accurate results. Hence how to conduct the analysis-process-oriented quality control so as to ensure the systematic stability has become one of major topics for researchers working on modern lab quality management.In order to facilitate the nationwide geochemical exploration and ensure reliable data and results of sample analysis, the paper focuses on the process-oriented management of geological labs, which is conductive to predicting or finding potential problems duly. Accordingly labs can adopt corrective or preventive measures to avoid or reduce unpleasant results. Specifically, the paper concentrates on the following aspects.First, it attempts to establish a reliable analysis pattern in order to choose an optimal analysis method and formulate an optimal corresponding plan. Second, it makes statistical analyses of results to conduct the analysis quality control. Third, it makes use of analyzed results to figure out abnormal problems in order to adopt effective measures, reduce random errors and prevent gross errors. Fourth, it applies this quality control plan to a project of regional geochemical exploration. Finally, it analyzes the impact and role of lab control management according to analyzed data of sample from a regional geochemical exploration.Through the medium of reviewing lab quality control methods at home and abroad, the paper tries to establish a quality control plan applicable to geological exploration labs of our country and makes a case study of the regional geochemical sample analysis conducted by our lab. It is concluded that the analysis-process-oriented quality control can ensure the quality of regional geochemical sample analysis and reduce systematic errors and gross errors, which contributes to reliable and accurate analyzed data. |
