Analysis of inter-laboratory quality control results in determining iodine in drinking water in iodine deficiency disorders laboratories in Shaanxi Province in 2017
2017
Objective
To evaluate the detection capability of water iodine of 74 iodine deficiency disorders (IDD) laboratories in Shaanxi Province, and to ensure the determining quality of water iodine in the national survey in 2017.
Methods
Totally 11 city-level IDD laboratories and 63 county-level IDD laboratories of centers for disease control (CDC) or endemic prevention and control institutions were selected in 2017. The IDD laboratory measured the mass concentration of high, low water iodine quality-control samples. The capabilities of all laboratories tested were evaluated through standard Z score generated from all the participatory laboratories.
Results
All 74 laboratories had feedback their testing results. Totally 71 laboratories were considered as qualified, and the qualified rate was 95.95%. Three laboratories were considered as unqualified, and the unqualified rate was 4.05%.
Conclusions
The results of the quality control have showed that the testing ability of all levels of iodine determination laboratories in Shaanxi Province in 2017 is maintained at a high level. Qualified laboratories in quality control could protect the project of drinking water iodine content survey in Shaanxi Province in 2017.
Key words:
Water; Iodine; Quality control; Laboratory
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