Wall, Joseph S. published the artcileSpectrophotometric determination of betaines and other quaternary compounds as their periodides, HPLC of Formula: 6249-56-5, the publication is Anal. Chem. (1960), 870-4, database is CAplus.
The method of Appleton, et al. (CA 48, 3437a), for the determination of choline, through the absorbance of its periodide at 365 mμ, was modified for the determination of other quaternary N compounds (e.g. betaine, trigonelline, carnitine, stachydrine, and γ-butyrobetaine) as each was separated from an extract of corn grain by ion-exchange chromatography (cf. following abstract). Certain N compounds (such as nicotinic acid, histidine, adenine, and thiamine), which give precipitates with I, may occur in some eluates but they do not interfere in this method. As many as 50 tubes of anal. samples containing 10-100 γ of a compound can be handled. The roles of pH, I concentration, temperature, time, and presence of chloride ions on the yield of the isolated periodide were studied.
Anal. Chem. published new progress about 6249-56-5. 6249-56-5 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst,Inhibitor,Natural product, name is 3-Carboxy-N,N,N-trimethylpropan-1-aminium chloride, and the molecular formula is C4Br2N2O4S, HPLC of Formula: 6249-56-5.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics