A new Iodobismuthate Method with a Low Volume Filtration Device as a New Tool for the Determination of Microgram Oxyethylate Amounts
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Bogdan Wyrwas
Abstract
The standard procedure of non-ionic surfactant detection by using the Bismuth Active Substances method offers low sensitivity, precision and a high consumption of the reagents. A new spectrophotometric (λmax = 460 nm of the visible spectrum) iodobismuthate method was developed, which may be successfully used to determine the presence of non-ionic surfactants at microgram levels. The oxyethylates were precipitated with the modified Dragendorff reagent, filtered, dissolved and afterwards the spectrophotometric determination of the equivalent bismuth amount was carried out. Several key factors, which influence the results of the proposed oxyethylate determination method, were optimized. The consumption of chemical reagents was notably decreased and the sensitivity of the method increased significantly in comparison to the standard method of non-ionic surfactant determination.
Kurzfassung
Die Standardmethode zur Bestimmung von nichtionischen Tensiden mittels bismutaktiver Substanzen ist gekennzeichnet von einer geringen Empfindlichkeit und Genauigkeit sowie von einem hohen Verbrauch an Reagenzien. Eine neue spektrophotometrische Iodbismutat-Methode (λmax = 460 nm des sichtbaren Spektrums) wurde entwickelt. Mit ihr wurden nicht-ionische Tenside im Mikrogrammbereich bestimmt. Die Oxyethylate wurden mit dem modifizierten Dargendroff-Reagenz ausgefällt, dann filtiert und wieder aufgelöst. Daran schloss sich die spektrophotometrische Bestimmung des Bismutäquivalents an. Es wurden verschiedene Schlüsselfaktoren, die die Ergebnisse der vorgeschlagenen Methode beeinflussten, optimiert. Im Vergleich zu der Standardbestimmungsmethode für nicht-ionische Tenside wurde der Verbrauch an Chemikalien erheblich verringert und die Empfindlichkeit der Methode deutlich erhöht.
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© 2015, Carl Hanser Publisher, Munich
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Review Article
- Polyphenolics-Phospholipid Complexes as Natural Cosmetic Ingredients: Properties and Application
- Cleaning and Hygiene
- Construction of a Virtual Washing Machine
- Larger Washing Machines and Smaller Household Size – How Can They Fit Together? Simulation of a Sustainable Use of Washing Machines
- Development of a Method for the Analysis of Microbial Load Reduction Factors on Dishes Cleaned by Hand and by Machine
- Environmental Chemistry
- A new Iodobismuthate Method with a Low Volume Filtration Device as a New Tool for the Determination of Microgram Oxyethylate Amounts
- Synthesis
- Hybrid Biosurfactant: Syntheses of Hybrid Corynomycolic Acid and its Monolayer Formation
- Efficient Synthesis of Nanostructured Poly(aniline-co-m-aminobenzoic acid) Copolymer in Presence of DBSA Surfactant
- Physical Chemistry
- Study of Mixed Micelles of Promethazine Hydrochloride (PMT) and Nonionic Surfactant (TX-100) Mixtures at Different Temperatures and Compositions
- Application
- Study of Underwater Contact Angles for Formulation of Fatliquoring Emulsions Using Green Surfactants
- Interfacial Properties of Alkylbenzene Sulfonates Ternary Mixtures
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Review Article
- Polyphenolics-Phospholipid Complexes as Natural Cosmetic Ingredients: Properties and Application
- Cleaning and Hygiene
- Construction of a Virtual Washing Machine
- Larger Washing Machines and Smaller Household Size – How Can They Fit Together? Simulation of a Sustainable Use of Washing Machines
- Development of a Method for the Analysis of Microbial Load Reduction Factors on Dishes Cleaned by Hand and by Machine
- Environmental Chemistry
- A new Iodobismuthate Method with a Low Volume Filtration Device as a New Tool for the Determination of Microgram Oxyethylate Amounts
- Synthesis
- Hybrid Biosurfactant: Syntheses of Hybrid Corynomycolic Acid and its Monolayer Formation
- Efficient Synthesis of Nanostructured Poly(aniline-co-m-aminobenzoic acid) Copolymer in Presence of DBSA Surfactant
- Physical Chemistry
- Study of Mixed Micelles of Promethazine Hydrochloride (PMT) and Nonionic Surfactant (TX-100) Mixtures at Different Temperatures and Compositions
- Application
- Study of Underwater Contact Angles for Formulation of Fatliquoring Emulsions Using Green Surfactants
- Interfacial Properties of Alkylbenzene Sulfonates Ternary Mixtures