[Comparison and analysis of 5 metal elements in serum between laboratories].

ABSTRACT

OBJECTIVE: To evaluate the ability for the detection of 5 metal elements in serum in the laboratories of disease prevention and control system. METHODS: The samples for calcium, magnesium, iron, copper and zinc detection were distributed to 48 laboratories of disease prevention and control system. Inductively coupled plasma mass spectrometry( ICP-MS) analysis or self-selected determination method were allowed to use during detection for each laboratory. The results were analyzed by robust statistical analysis and Z value was used to evaluate the detection ability. RESULTS: Of the laboratories involved in the study, 40 reported results of metal elements detection. Among them, 29 laboratories had satisfactory results, and 11 laboratories had unsatisfactory or suspicious results. The laboratory pass rate of this inter-laboratory comparison was60. 4%. CONCLUSION: The detection level of calcium, magnesium, iron, copper and zinc in serum in disease prevention and control system is generally satisfactory, but the detection ability of some laboratories needs to be further improved.