Method for determining content of sodium hydrogen sulfite in azasetron hydrochloride sodium chloride injection
A technology of azasetron hydrochloride, sodium chloride and sodium bisulfite, which is applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of large sample volume, large blank interference, and complicated method for sodium bisulfite content. , to achieve the effect of high selectivity
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[0015] 1. Prepare the solutions used in the assay:
[0016] (1) Preparation of 0.4% formaldehyde solution: take 4.0mL formaldehyde solution, put it in a 100mL volumetric flask, add water to dilute to the mark, shake well, and you get it;
[0017] (2) Preparation of the test solution: accurately measure 2 mL of azasetron hydrochloride sodium chloride injection, put it in a 20 mL volumetric flask, dilute to the mark with 0.4% formaldehyde solution, shake well, and obtain;
[0018] (3) Preparation of sodium bisulfite reference substance solution: Accurately weigh 100 mg of sodium bisulfite reference substance, place it in a 100 mL volumetric flask, add water to dissolve, and dilute to the mark with water, accurately pipette 2 mL, place it in a 100 mL volumetric flask, and use 0.4 Dilute the % formaldehyde solution to the mark, shake well, and get it;
[0019] (4) Preparation of sodium bisulfate reference substance solution: Accurately weigh 100 mg of sodium bisulfate reference s...
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