Potency of commercial vitamins

✍ Scribed by J.S.H.

• Book ID: 104125441
• Publisher: Elsevier Science
• Year: 1924
• Tongue: English
• Weight: 62 KB
• Volume: 197
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(24)90947-1

✦ Synopsis

Chem. Soc., r923, 45, 2958)

recommends an aqueous solution of chrome alum as a light filter in qualitative analysis. A solution of 3Io grams of chrome alum in one litre of water is prepared with the aid of heat, is cooled to room temperature, and filtered. Square prismatic bottles, Having a lateral edge of 4.7 cm. and a height of Io cm. from bottom to shoulder, are filled with this solution and corked. The resulting permanent filter is held upright, very close to the eye and 5 or 6 cm. from the flame. It completely absorbs the light emitted by sodium, lithium, calcium, strontium, and barium, and transmits that emitted by potassium, c~esium, and rubidium.

J. S. H.