ArticleBioanalysis
Evaluation of volumetric DBS for lead analysis using ICP-MS/MS: addressing matrix effects and hematocrit variability.
Article in Bioanalysis. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
backgroundLead testing in dried blood spots (DBS) offer a convenient alternative to venous blood draw; however, its adoption has been limited by variable extraction efficiency, matrix effects, and hematocrit-dependent recovery. To mitigate these challenges, we explored the utility of volumetric DBS (vDBS) cards, which are known to deposit a fixed volume of blood that gets analyzed. MATERIALS AND
methodsSamples (quality control, proficiency testing, lead spiked, and patient samples that were positive for lead) were pipetted onto the backs of vDBS cards. Extracts were analyzed using Inductively Coupled Plasma-Tandem Mass Spectrometry in collision/reaction cell mode with oxygen gas. Deming regression analyses evaluated whole blood and vDBS analyzed with aqueous calibrators; vDBS analyzed with aqueous and DBS calibrators. Samples with varying hematocrit were assessed for impact on recovery.
resultsA comparison of vDBS cards (
conclusionvDBS can be analyzed without matrix-matched calibrators to simplify routine assessment.
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