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  • Title: [Determination of the content of serum calcium with methylthymol blue as chromogenic reagent].
    Author: Yang C, Liu W, Zhao Z, Wu H.
    Journal: Guang Pu Xue Yu Guang Pu Fen Xi; 1998 Aug; 18(4):485-7. PubMed ID: 15825349.
    Abstract:
    It is reported in this paper that calcium can be determined with MTB as chromogenic reagent by isoabsorption dual-wavelength elimination. The measuring wavelength and referential wavelength were 613.7 and 590.0nm, respectively. No masking reagent was necessary in the analysis. The average recovery and RSD of calcium are 98.98% and 0.81%, respectively. Compared with titration, this method is rapid, simple and precise.
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