In:
Applied and Environmental Microbiology, American Society for Microbiology, Vol. 31, No. 4 ( 1976-04), p. 459-464
Abstract:
The turbidimetric methods in routine use at two laboratories for the microbiological assay of vitamin B12 have been compared. Attempts were made to standardize some major parts of the method, i.e., assay design, test strain (Lactobacillus leichmannii), test medium, and reference standard. The laboratories used different approaches to achieve efficient assay procedures. During a 6-year period four comparative experiments were carried out. In these experiments the vitamin B12 content of five different products was determined in a series of independent assays at each laboratory. A satisfactory degree of agreement (difference less than 5%) was found for four of these products.
Type of Medium:
Online Resource
ISSN:
0099-2240
,
1098-5336
DOI:
10.1128/aem.31.4.459-464.1976
Language:
English
Publisher:
American Society for Microbiology
Publication Date:
1976
detail.hit.zdb_id:
223011-2
detail.hit.zdb_id:
1478346-0
SSG:
12
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