Performance of different screening methods for the determination of urinary glycosaminoclycans.
Clin Chem Lab Med 2012;
51:347-50. [PMID:
22987832 DOI:
10.1515/cclm-2012-0471]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2012] [Accepted: 08/20/2012] [Indexed: 11/15/2022]
Abstract
BACKGROUND
The study aim was to compare the performance of three different methods used for determining urinary glycosaminoglycans (GAG) levels in spot and 24-h urine samples.
METHODS
Performance characteristics were studied for cetylpyridinium chloride (CPC), and manual and automated dimethylmethylene blue (DMB) methods.
RESULTS
For automated DMB method, within-run precisions were 9.10% and 1.98%, and between-day precisions were 13.0% and 5.81% in low- and high-urine pools, respectively. The method was linear up to 100 mg/L of GAG concentration. The detection limit of the method was 0.71 mg/L. Mean recovery was 95.7%.
CONCLUSIONS
The automated DMB method was found to give better performance characteristics than cetylpyridinium chloride (CPC) and manual DMB methods. It is a fast, cheap, simple and reliable method and can be applied in many diseases in which GAG is used as a screening test.
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