The invention relates to the field of
chemical measurement, in particular to a method and
system for measuring the anti-Xa factor
titer of a low-molecular-weight
heparin calcium injection.The method comprises the steps that 100 microliters of a low-molecular-weight
heparin calcium solution and 100 microliters of an
antithrombin solution are taken and evenly mixed, balancing is conducted for 1 minute at the temperature of 37 DEG C, and a first
mixed solution is obtained; adding 200 [mu] l of an FXa solution into the first
mixed solution, uniformly mixing, and balancing at 37 DEG C for 1 minute to obtain a second
mixed solution; adding 500 [mu] l of a chromophoric substrate solution into the second mixed solution, mixing, and balancing at 37 DEG C for 4 min to obtain a
test solution; continuously measuring the
absorbance of the
test solution at the
wavelength of 405nm by using an
ultraviolet spectrophotometer and taking water as a blank, recording the current
absorbance every one minute, totally 5 minutes, and calculating the
absorbance change rate; 100 [mu] l of a trihydroxymethyl aminomethane-
sodium chloride buffer solution and 100 [mu] l of a
test solution are taken to replace a low-molecular-weight
heparin calcium solution to be operated according to the steps, the absorbance change rates are calculated respectively, operation is more convenient, and the working efficiency is improved.