The Identification and Quantitative Analysis of Certain Quaternary Ammonium Compounds using Ultraviolet Absorption Spectra**Food and Drux Directorate, Department of National Health and Welfare, Ottawa. Ontario. Canada.

Pernarowski, M.; Chatten, L.G.

doi:10.1002/jps.3030470318

Cited by 6 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…20 g, were weighed with an accuracy of 0.0001 g and subjected to extraction in 750 cm 3 of demineralized water (conductivity <10 μS at 36 ± 2 °C) for 15 min (test A) and 24 h (test B). At the end of the extraction, the aqueous solution was quantitatively transferred into a 1000 cm 3 graduated flask and the UV absorbance was measured with methyl orange according to methodology reported in the literature [50,51,52].…”

Section: Methodsmentioning

confidence: 99%

Application of Biocides and Super-Absorbing Polymers to Enhance the Efficiency of Filtering Materials

et al. 2019

View full text Add to dashboard Cite

Studies on the functionalization of materials used for the construction of filtering facepiece respirators (FFRs) relate to endowing fibers with biocidal properties. There is also a real need for reducing moisture content accumulating in such materials during FFR use, as it would lead to decreased microorganism survival. Thus, in our study, we propose the use of superabsorbent polymers (SAPs), together with a biocidal agent (biohalloysite), as additives in the manufacturing of polypropylene/polyester (PP/PET) multifunctional filtering material (MFM). The aim of this study was to evaluate the MFM for stability of the modifier’s attachment to the polymer matrix, the degree of survival of microorganisms on the nonwoven, and its microorganism filtration efficiency. Scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy were used to test the stability of the modifier’s attachment. The filtration efficiency was determined under conditions of dynamic aerosol flow of S. aureus bacteria. The survival rates (N%) of the following microorganisms were assessed: Escherichia coli and Staphylococcus aureus bacteria, Candida albicans yeast, and Aspergillus niger mold using the AATCC 100-2004 method. FTIR spectrum analysis confirmed the pre-established composition of MFM. The loss of the active substance from MFM in simulated conditions of use did not exceed 0.02%, which validated the stability of the modifier’s attachment to the PP/PET fiber structure. SEM image analysis verified the uniformity of the MFM structure. Lower microorganism survival rates were detected for S. aureus, C. albicans, and E. coli on the MFM nonwoven compared to control samples that did not contain the modifiers. However, the MFM did not inhibit A. niger growth. The MFM also showed high filtration efficiency (99.86%) against S. aureus bacteria.

show abstract

Section: Methodsmentioning

confidence: 99%

Application of Biocides and Super-Absorbing Polymers to Enhance the Efficiency of Filtering Materials

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Ultraviolet absorption spectra are used for the identification and analysis of certain quaternary ammonium compounds (367). A turbidimetric assay for benzalkonium chloride has been suggested (385).…”

Section: Nitrogen-containing Compoundsmentioning

confidence: 99%

Pharmaceuticals and Related Drugs

Papariello¹,

Slack²,

Mader³

1961

Anal. Chem.

View full text Add to dashboard Cite

“…The ultraviolet absorption spectra of a number of quaternary ammonium compounds of pharmaceutical importance are suitable for their identification and quantitative determination (485). A colorimetric method for the determination of long-chain quaternary ammonium compounds is based on their conversion into iodides by potassium iodide, extraction of the iodides into chloroform from aqueous solution, and oxidation of iodide to iodine (527).…”

mentioning

confidence: 99%