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Niacin Assay Medium

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Niacin Assay Medium

山東拓普生物工程有限公司培養基配方 //ljxinglong.com

Composition per liter:

Glucose .............................................................40.0g

Sodium acetate..................................................20.0g

Vitamin assay casamino acids...........................12.0g

K2HPO4...............................................................1.0g

KH2PO4...............................................................1.0g

L-Cystine .............................................................0.4g

MgSO4·7H2O ......................................................0.4g

DL-Tryptophan.....................................................0.2g

Adenine sulfate .................................................0.02g

FeSO4·5H2O......................................................0.02g

Guanine·HCl .....................................................0.02g

MnSO4·H2O ......................................................0.02g

NaCl..................................................................0.02g

Uracil ................................................................0.02g

Pyridoxine·HCl ................................................0.4mg

Riboflavin ........................................................0.4mg

Calcium pantothenate ......................................0.2mg

Thiamine·HCl ..................................................0.2mg

p-Aminobenzoic acid.......................................0.1mg

Biotin ............................................................... 0.8μg

pH 6.7 ± 0.2 at 25°C

Source: This medium is available as a premixed

powder from BD Diagnostic Systems.

Preparation of Medium: Add components to

distilled/deionized water and bring volume to 1.0L.

Mix thoroughly. Gently heat and bring to boiling.

Continue boiling for 2–3 min. Distribute into tubes in

5.0mL volumes. Add standard solution or test solu

tions to each tube. Adjust the volume of each tube to

10.0mL with distilled/deionized water. Autoclave for

10 min at 15 psi pressure–121°C.

Use: For the microbiological assay of nicotinic acid

or nicotinamide (niacin) using Lactobacillus plan

tarum as the test organism.

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