Experiences with folic acid, by Tom D. Spies. The Yearbook Publishers, Inc., Chicago, 1947. 110pp. 15 × 23cm. Price, $ 3.75
- Book ID
- 102414067
- Publisher
- Elsevier
- Year
- 1948
- Weight
- 112 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0095-9553
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✦ Synopsis
A study of several quantitative microscopic methods for analyzing commercial starches in mixtures and for the similar analysis of starch granules in certain vegetable drug powders has been made.
A saturated solution of zinc sulfate U. S. P. was found to be superior to agents previously used as starch-suspending agents. This suspending medium, when used with a Levy blood counting slide, gave sufficiently even starch granule dispersion to provide for more consistent microscopic starch counting than previously reported.
The above method was found best applicable to the analysis of the starches from potato tubers, grains of wheat, rice, and corn, and from the vegetahle drugs belladonna, glycyrrhiza, aconite, and orris roots.
All counts and percentages ascertained were compared. with results obtained from an accepted quantitative chemical analysis procedure on the same sample. Comparisons are shown in Tables I1 andV and were considered to be favorable.
The advantages and limitations of the procedure have been described.