
Keywords: DTE، dithioerythritol; AMP, 2-amino-2-methyl-1-propanol; CDC, Centers for Disease Control; DPD, 3,5-dichlorophenyldiazonium tetrafluoroborate; DTE, dithioerythritol; eGFR, estimated glomerular filtration rate; ERM, European Reference Material; GC–IDMS, gas chromatography–isotop