Niacin assay medium is used for the determination of niacin.
Preparation method: Weigh 7.51 g of this product in 100 mL of distilled or deionized water (the volume may be scaled up or down proportionally), adjust to a final pH of 6.7 ± 0.2 (20°C–25°C), heat with stirring and boil for 2–3 minutes until completely dissolved, dispense (stir well to ensure even distribution of insoluble matter), and set aside for use.
Specific formula composition:
Casamino acids 12.0 g, niacin pyridoxine 400.0 µg
Glucose 40.0 g, riboflavin 400.0 µg
L-cystine 0.4 g, p-aminobenzoic acid 100.0 µg
Sodium acetate 20.0 g, biotin 0.8 µg
DL-tryptophan 0.2 g, dipotassium hydrogen phosphate 1.0 g
Adenine hydrochloride 20.0 mg, potassium dihydrogen phosphate 1.0 g
Guanine hydrochloride 20.0 mg, magnesium sulfate 0.4 g
Uracil 20.0 mg, sodium chloride 20.0 mg
Thiamine hydrochloride 200.0 µg, ferrous sulfate 20.0 mg
Calcium pantothenate 200.0 µg, manganese sulfate 20.0 mg
Usage precautions:
Avoid contact with skin and eyes during use. This product is for laboratory microbiological testing.
危险品化学品经营许可证（带存储）