Systematic Identification of Japanese Official Water-soluble Food Colors by Paper Chromatography

Study of phenylketonuria by paper chromatography

The identification of barbiturates by paper chromatography.

B ECAUSE barbiturates are relatively easily available and much used drugs, specimens from suspected cases of poisoning are frequently submitted to the laboratory for routine chemical examination. Since their urinary excretion begins early (because they are quickly absorbed), they can often be identified 1-2 hours after administration. The specimen of choice for examination is therefore the urin...

Structural determination of the subsidiary colors in food blue No. 1 (brilliant blue FCF) aluminum lake detected by paper chromatography.

One of eight Food Blue No. 1 aluminum lakes (B-1Als) used in the official inspection of coal-tar colors in fiscal year 1999 had a violet sub-spot during paper chromatography and was rejected. To clarify the orgin of the sub-spot, the violet subsidiary color (Sub-V) was isolated from the sample. On the basis of NMR and MS analyses and ion chromatography, the structure of the subsidiary color was...

Identification of corticosteroids of beef adrenal extract by paper chromatography.

Chemical studies initiated in the laboratories of Reichstein, Kendall, and Wintersteiner (1) resulted in the isolation of twenty-eight crystalline steroids from adrenal gland extracts. Twelve of the compounds possessed an a-ketol side chain and, of these, six proved to be biologically active. The finding of 11-desoxycorticosterone, one of these active steroids, by Reichstein and von Euw (2) has...

study of phenylketonuria by paper chromatography

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