A novel method for quantification of human hemoglobin from dried blood spots by use of tandem mass spectrometry

Analytical and Bioanalytical Chemistry
Chaowen YuLin Zou

Abstract

Quantification of human hemoglobin (Hb) is essential for diagnosis of anemia, especially for screening for thalassemia and sickle cell disease. The main methods currently used for quantification of Hb, including spectrophotometry, fluorimetry, and electrochemical assays, are all based on the structural integrity of Hb, which could be affected by hemolysis and degradation. When used for disease screening, whole blood specimens cannot meet requirements for sample collecting, transport, and storage. Here, we report a novel MS-MS method for quantification of Hb from dried blood spots (DBS) by use of a triple-quadrupole mass spectrometer. Proteospecific peptides from α-globin chains were selected after tryptic digestion. The precursor → product ion transitions of representative peptides were studied to identify the best choice with regard to sensitivity and chromatographic properties. For quantification, stable isotope-labeled peptides were used as internal standards. The concentration of Hb in each sample was obtained by calculation on the basis of established equations. The precision of the method was within 15 % and accuracy was in the range -7 to 13.0 %. Compared with routine clinical results obtained by use of the automated hem...Continue Reading

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Citations

Jul 26, 2021·Analytical Biochemistry·Pushpanjali DasauniSuman Kundu
Oct 17, 2021·Scientific Reports·Kelly WhittakerRuo-Pan Huang

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