[Detection and determination of protein-bound formaldehyde. II. Improved recovery of formaldehyde by reduction with sodium cyanoborohydride (NaCNBH3)].
{"title":"[Detection and determination of protein-bound formaldehyde. II. Improved recovery of formaldehyde by reduction with sodium cyanoborohydride (NaCNBH3)].","authors":"W Brunn, H Klostermeyer","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>When using NaCNBH3 as a reductant, it is possible to recover 70% of added formaldehyde in foods--in this skim milk powder. Formaldehyde is attached to the epsilon-Aminogroups of lysine and is detected after reduction in form of N epsilon-methyllysine in an automated amino acid analyzer system. After addition of N alpha-acetyllysine the reduction is carried out by incubating the skim milk powder at 70 degrees C for 1 h. The best combination of pH, concentration of reductant, time and temperature of incubation is described.</p>","PeriodicalId":23941,"journal":{"name":"Zeitschrift fur Lebensmittel-Untersuchung und -Forschung","volume":"176 5","pages":"367-70"},"PeriodicalIF":0.0000,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zeitschrift fur Lebensmittel-Untersuchung und -Forschung","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
When using NaCNBH3 as a reductant, it is possible to recover 70% of added formaldehyde in foods--in this skim milk powder. Formaldehyde is attached to the epsilon-Aminogroups of lysine and is detected after reduction in form of N epsilon-methyllysine in an automated amino acid analyzer system. After addition of N alpha-acetyllysine the reduction is carried out by incubating the skim milk powder at 70 degrees C for 1 h. The best combination of pH, concentration of reductant, time and temperature of incubation is described.
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