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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Quantitation of o- and p-sulfamoylbenzoic acids in commerical saccharin by high-performance liquid chromatography.

Quantitation of o- and p-sulfamoylbenzoic acid residues in saccharin and its sodium salt is achieved by a method comprising methanolic extraction and high-performance ion exchange chromatography. A commercially available anion exchange column was employed with an aqueous buffered (pH 9.2) mobile phase. As little as 80 ppm of the ortho-isomer and 25 ppm of the para-isomer can be accurately determined. The levels of detectability (2 times noise) are estimated as 8 ppm (0.16 mug on column) and 2.5 ppm (0.05 mug on column), respectively. Recoveries from saccharin ranged from 92.7 to 96.5% (ortho) and from 92.2 to 103.3% (para). Recoveries from the sodium salt ranged from 93.1 to 104.4% (ortho) and from 93.5 to 97.8% (para). Of 9 other potential saccharin impurities tested separately, only one was found to interfere slightly in the chromatographic part of the procedure.[1]

References

  1. Quantitation of o- and p-sulfamoylbenzoic acids in commerical saccharin by high-performance liquid chromatography. Nelson, J.J. Journal - Association of Official Analytical Chemists. (1976) [Pubmed]
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