Abstract
The evaluation of glycated hemoglobin (HbA(1c)) is used in daily practice for monitoring the diabetes mellitus. HbA(1c) may be assayed by different methods, among which high-pressure liquid chromatography (HPLC). We have evaluated a new kit 2.0 available on HPLC Variant II(®) Turbo analyzer (Bio-Rad), which is characterized by an elution buffer containing sodium perchlorate. The correlation with the routine method used in our laboratory (HPLC Variant II(®) analyzer equipped with the NU kit) is good (r² = 0.997). Intra- and inter-assay coefficients of variation are respectively lower than 0.6 and 1.6%. Linearity is excellent from 3.2% (11 mmol/mol) to 18.3% (177 mmol/mol). There is no inter-sample contamination. This method provides a result quickly (96 seconds), but does not allow separating labile HbA(1c) from carbamylated hemoglobin, contrary to the NU kit. As the control of analytical quality is a major concern for validation and clinical use of HbA(1c) results, the characteristics of this new kit make it a well-suited tool for daily laboratory practice.
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