Plastics. Polyvinyl chloride resins. Determination of number of impurities and foreign particles

Determination of extremely low percolation threshold electroactivity of the blend polyvinyl chloride/polyaniline doped with camphorsulfonic acid by cyclic voltammetry method

European Polymer Journal ◽

10.1016/s0014-3057(01)00232-4 ◽

2002 ◽

Vol 38 (4) ◽

pp. 771-777 ◽

Cited By ~ 26

Author(s):

H Namazi ◽

R Kabiri ◽

A Entezami

Keyword(s):

Cyclic Voltammetry ◽

Percolation Threshold ◽

Polyvinyl Chloride ◽

Camphorsulfonic Acid ◽

Cyclic Voltammetry Method

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Comparative study of normal, micro- & nano-sized iron oxide effect in potentiometric determination of fluconazole in biological fluids

RSC Advances ◽

10.1039/c5ra05245a ◽

2015 ◽

Vol 5 (47) ◽

pp. 37957-37963 ◽

Cited By ~ 4

Author(s):

Lobna A. Hussein ◽

Amira M. El-Kosasy ◽

Yossra A. Trabik

Keyword(s):

Iron Oxide ◽

Comparative Study ◽

Polyvinyl Chloride ◽

Biological Fluids ◽

Polymeric Matrix ◽

Potentiometric Determination

Three novel fluconazole (FLU) selective electrodes were investigated with di-octyl phthalate as a plasticizer in a polymeric matrix of polyvinyl chloride and 2-hydroxypropyl-β-cyclodextrin as an ionophore.

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Microsized Graphite Sensors for Potentiometric Determination of Cyclobenzaprine Hydrochloride in Pure Powder, Tablets, and Plasma

Journal of AOAC International ◽

10.5740/jaoacint.10-361 ◽

2011 ◽

Vol 94 (6) ◽

pp. 1807-1814 ◽

Cited By ~ 8

Author(s):

Nesrin K Ramadan ◽

Hala E Zaazaa ◽

Hanan A Merey

Keyword(s):

Polyvinyl Chloride ◽

International Union ◽

Electroactive Material ◽

Significant Difference ◽

Intact Drug ◽

Sensitivity And Selectivity ◽

Ph Range ◽

The U.S ◽

Chloride Matrix

Abstract Two cyclobenzaprine hydrochloride (CZ) microsized graphite selective sensors were investigated with dibutylsebacate as a plasticizer in a polymeric matrix of carboxylated polyvinyl chloride (PVC-COOH) in the case of sensor 1, based on the interaction between the drug and the dissociated COOH groups in the PVC-COOH. Sensor 2 was based on the interaction between the drug and ammonium reineckate, which acted as anionic electroactive material in the presence of polyvinyl chloride matrix. The two sensors were constructed by using 2-hydroxy propyl β-cyclodextrin as an ionophore, which has a significant influence on increasing the membrane sensitivity and selectivity of both sensors. Fast and stable Nernstian responses of 1 × 10–5–1 × 10–2 and 1 × 10m–4–1 × 10–2 M for the two sensors, respectively, with slopes of 58.6 and 55.5 mV/decade, respectively, over the pH range 2–4 were obtained. The proposed method displayed useful analytical characteristics for determination of CZ in its pure powder form with average recoveries 99.95 ± 0.23 and 99.61 ± 0.34% for sensors 1 and 2, respectively, and in plasma with good recoveries. The sensors were also used to determine the intact drug in the presence of its degradate and, thus, could be used as stability-indicating methods. The obtained results by the proposed methods were statistically analyzed and compared with those obtained by the U.S. Pharmacopeia method; no significant difference for either accuracy or precision was observed. Results obtained with the two electrodes revealed their performance characteristics, which were evaluated according to International Union of Pure and Applied Chemistry recommendations.

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Application of chromato-mass-spectrometric methods of determination of exposure markers in biomonitoring researches in workers of productions of polyvinyl chloride and aluminum

Hygiene and Sanitation ◽

10.47470/0016-9900-2020-99-10-1159-1164 ◽

2020 ◽

Vol 99 (10) ◽

pp. 1159-1164

Author(s):

Salim F. Shayakhmetov ◽

Olga M. Zhurba ◽

Anton N. Alekseenko ◽

Alexey V. Merinov

Keyword(s):

Polyvinyl Chloride ◽

Mass Spectrometric ◽

Aluminum Production ◽

Control Groups ◽

Biological Media ◽

Mass Selective Detector ◽

Selective Detector ◽

Highly Sensitive ◽

Polycyclic Aromatic

Introduction. The presence of highly toxic polycyclic aromatic hydrocarbons (PAHs) in the production of aluminum and organochlorine compounds (OCC) in the production of polyvinyl chloride (PVC) poses a serious threat to the health of workers, necessitates biological monitoring of toxicants and their metabolites in biological media to assess health risks on basis of modern methods chemical analysis. Material and methods. Biomonitoring studies of the content of marker metabolite OCC - thiodiacetic acid (TDAA) in urine were performed in 65 workers of PVC production and PAHs metabolite - 1-hydroxypyrene (1-OHPyr) in 144 workers of the aluminum smelter using developed own methods of gas-chromato-mass-spectrometric (GC-MS) analysis. Sample analysis was performed on an Agilent 7890A gas chromatograph with an Agilent 5979 mass selective detector. Results. Methodological methods and parameters of GC-MS measurement of TDAA and 1-OHPyr in urine, which provided high selectivity and sensitivity of the analysis of samples, were examined and considered. Reliable differences in the levels of marker metabolites among the groups of main and auxiliary occupations and persons in the control groups, their dependence on the degree of exposure to PAHs, and OCC were established. The highest concentrations of TDAA in urine were observed in unit operators of PVC workshop and 1-OHPyr - in anode workers of aluminum production. Discussion. The revealed reliable intergroup and interindividual differences in the contents of TDAA and 1-OHPyr in the urine of workers indicate the reliability and informativeness of the results of the analysis of biological media. The results are consistent with data from foreign studies, confirm the occupational - production nature of the exposure of toxicants among workers in the main professions of enterprises. Conclusion. The results of approbation of highly sensitive and selective methods for the determination of TDAA and 1-OHPyr in urine samples developed on the base of GC-MS method demonstrate the possibility of their use in biomonitoring studies of workers of productions and the population to adequately assess the exposure of highly toxic PAHs and OCC.

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