Effect of temperature and time on the detection of calcium and magnesium in urinary sample storage / 中国职业医学

ABSTRACT

OBJECTIVE: To investigate the effect of temperature and time on the detection results of calcium and magnesium in urinary sample storage. METHODS: Urinary samples of 5 health volunteers were collected. The samples were stored in room temperature, 4 ℃ and-20 ℃ for different duration after sealed separately. A flame atomic absorption spectrometry was used to detect calcium and magnesium mass concentrations in the urinary samples. RESULTS: The variation rate of calcium and magnesium mass concentrations was <2.00% when urinary samples were stored at room temperature for 8 hours, the variation rate was <6.00% when samples were stored at 4 ℃ for 15 days, and it was <5.00% when samples were stored at-20 ℃ for 60 days. CONCLUSION: The temperature and time of urinary sample storage can affect the detection results of calcium and magnesium mass concentrations. Packing and storing samples at low temperature after collection as soon as possible is beneficial to ensure the accuracy of test results.