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Title of Journal: Mikrochim Acta

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Abbravation: Microchimica Acta

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Springer Vienna

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DOI

10.1002/asna.19382651702

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ISSN

1436-5073

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Microdetermination of sulfur amino acids with Nbr

Authors: R J Thibert M Sarwar
Publish Date: 1969/03/01
Volume: 57, Issue: 2, Pages: 259-265
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Abstract

A rapid and convenient method for the determination of sulfur amino acids is described NBromosuccinimide is used as a direct titrant using Bordeaux Red as an indicator The red color of the indicator changes to distinct yellow with a sharp end point The error is less than ±05 in most cases and in a few cases it is near ±1 Comparison of three methods has been made backtitration direct method using either Crystal Violet or Bordeaux Red as indicators Bordeaux Red proved to be the more suitable end point indicator Aqueous solutions of Nbromosuccinimide are stable over a period of several days when kept refrigerated and protected from lightEine zweckdienliche Methode zur Bestimmung schwefelhältiger Aminosäuren wurde beschrieben NBromsuccinimid dient als Maßlösung Bordeauxrot als Indikator dessen rote Farbe scharf nach gelb umschlägt Der Fehler ist meist kleiner als ±05 in wenigen Fällen ungefähr ±1 Vergleichsweise wurden erprobt 1 die Rücktitration 2 direkte Titration mit Kristall violett oder Bordeauxrot Letzteres hat sich besser bewährt Wäßrige Lösungen von NBromsuccinimid sind in der Kälte vor Licht geschützt einige Tage haltbar

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  3. A fluorescent chemical sensor for ethanol determination in alcoholic beverages
  4. Click chemistry-based synthesis of water-dispersible hydrophobic magnetic nanoparticles for use in solid phase extraction of non-steroidal anti-inflammatory drugs
  5. A glassy carbon electrode modified with the nickel(II)-bis(1,10-phenanthroline) complex and multi-walled carbon nanotubes, and its use as a sensor for ascorbic acid
  6. Non-enzymatic sensing of glucose and hydrogen peroxide using a glassy carbon electrode modified with a nanocomposite consisting of nanoporous copper, carbon black and nafion
  7. Dynamic evaluation of cell-secreted interferon gamma in response to drug stimulation via a sensitive electro-chemiluminescence immunosensor based on a glassy carbon electrode modified with graphene oxide, polyaniline nanofibers, magnetic beads, and gold nanoparticles
  8. Ultrasensitive Assay of Rhein in Medicine Based on its Enhanced Luminol-K 3 Fe(CN) 6 Chemiluminescence Reaction Using the Flow Injection Technique
  9. Image Formation in Low Vacuum SEM
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  11. Schnellbestimmung von Hexachlorcyklohexan neben DDT mit Hilfe der Mikrobrechungsindexbestimmung nach Kofler
  12. Colorimetric and bare-eye detection of alkaline earth metal ions based on the aggregation of silver nanoparticles functionalized with thioglycolic acid
  13. An on-site immunosensor for ractopamine based on a personal glucose meter and using magnetic β-cyclodextrin-coated nanoparticles for enrichment, and an invertase-labeled nanogold probe for signal amplification
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