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Xu C, Ding Y, Leung HW, Tong BMK, Shin RYC, Lee TK. Development of high accuracy methods for the certification of calcium, iron, magnesium and potassium in human serum. J Trace Elem Med Biol 2017; 40:61-66. [PMID: 28159223 DOI: 10.1016/j.jtemb.2016.12.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/16/2016] [Accepted: 12/19/2016] [Indexed: 10/20/2022]
Abstract
High accuracy methods were developed for the measurements of calcium, potassium, iron and magnesium in human serum using standard addition and isotope dilution mass spectrometry methods. The results were comparable to those obtained by other national metrology institutes and designated institutes as demonstrated in an inter-laboratory comparison. The methods were then adopted for the assignment of reference values in a human serum material and the uncertainties associated with the certified values were obtained by combining the uncertainty components from the characterisation, homogeneity and long-term stability of the materials. The certified values are traceable to the International System of Units and the material can be used by the clinical testing laboratories to validate their methods or as a quality control material to improve the accuracy of their measurements.
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Affiliation(s)
- Chang Xu
- Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority of Singapore, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
| | - Yi Ding
- Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority of Singapore, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
| | - Ho Wah Leung
- Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority of Singapore, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
| | - Benny Meng Kiat Tong
- Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority of Singapore, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
| | - Richard Y C Shin
- Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority of Singapore, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore.
| | - Tong Kooi Lee
- Chemical Metrology Laboratory, Chemical Metrology Division, Applied Sciences Group, Health Sciences Authority of Singapore, 1 Science Park Road, #01-05/06, The Capricorn, Singapore Science Park II, Singapore 117528, Singapore
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