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- W3120977299 abstract "Many populations in low- and middle income countries are at a higher risk of thiamine deficiency, mainly due to the lack of dietary diversification and their reliance on staple crops low in thiamine content, such as polished rice. Unfortunately, symptoms of thiamine deficiency are variable and clinical determination of thiamine status is essential for early diagnosis. Currently, the diagnosis of thiamine deficiency in remote regions is hampered due to several drawbacks related to venous blood collection, for example, cold chain transport. Therefore, we here describe the first liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of thiamine diphosphate (TDP) in dried blood, using volumetric absorptive microsampling (VAMS). Moreover, by setting up an additional method in liquid blood, the results in VAMS samples could be compared to liquid blood samples. Both methods, employing a simple one-step extraction and fast (2 min) chromatography, were fully validated based on international guidelines. Accuracy (% bias) was below 6.5% for all QC levels. The total imprecision (% CV) was below 13% for both QCs and native blood samples. The recovery of the VAMS samples was not impacted by the hematocrit, within the hematocrit range of 0.20–0.60. Additionally, we showed improved TDP stability in dried blood compared to liquid blood. VAMS samples were stable for 1 week at 60 °C or at high humidity (80%) and for at least 1 month at room temperature. Finally, we demonstrated the commutability of commercial calibrators with authentic blood samples. The validity and applicability of both methods were demonstrated via their successful application on blood samples from healthy volunteers." @default.
- W3120977299 created "2021-01-18" @default.
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- W3120977299 date "2021-01-06" @default.
- W3120977299 modified "2023-10-03" @default.
- W3120977299 title "Patient-Centric Assessment of Thiamine Status in Dried Blood Volumetric Absorptive Microsamples Using LC–MS/MS Analysis" @default.
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- W3120977299 doi "https://doi.org/10.1021/acs.analchem.0c05018" @default.
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