Method for simultaneously determining six related steroid hormones of CAH

The invention relates to the field of screening of congenital adrenal hyperplasia, in particular to a method for simultaneously determining six related steroid hormones of CAH. The six related steroid hormones are 17 alpha-hydroxyprogesterone, androstenedione, 11-deoxycortisol, 21-deoxycortisol, cortisol and corticosterone; the determination method comprises the following steps: S1, respectively preparing a mixed internal standard product, a quality control product and a standard curve product; s2, preparing a sample extracting solution; s3, extracting and incubating a sample; s4, concentrating the redissolved sample; and S5, determining the reconstitution fluid by using a liquid chromatography tandem mass spectrometer, drawing a calibration curve, and calculating the concentrations of 17 alpha-hydroxyprogesterone, androstenedione, 11-deoxycortisol, 21-deoxycortisol, cortisol and corticosterone in the sample to be detected. The CAH screening specificity and the positive predicted value can be effectively impr