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Article Abstract
In this communication, we describe the first analytical method for the determination of free histidine in hair care products (shampoos and conditioners). Cation-exchange chromatography combined with postcolumn derivatization and fluorimetric detection enabled the accurate (recovery: 83.5-114.8%) and precise (2.4-5.6% RSD) determination of free histidine without matrix interferences at concentration levels down to 1.5 mg kg. Real commercially available samples were found to contain the amino acid at levels ranging between 70 and 535 mg kg.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9863815 | PMC |
| http://dx.doi.org/10.3390/molecules28020888 | DOI Listing |
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