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1

Determination of bisphenol-A in drinking water using new SPE sorbents with chemically bonded ketoimine groups

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Rykowska I., Szymanski A., Wasiak W.
Polish Journal of Food and Nutrition Sciences
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2005
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tom 14/55
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nr 3
2
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Evaluation of titanium content in mucosa covering two-stage intraosseous implants*

100%
Makuch k., Koczorowski R., Rykowska I., Wasiak W.
Journal of Elementology
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2011
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tom 16
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nr 2
Widely used biomaterials, including titanium and its alloys, manifest a range of the physicochemical properties which determine the way they are exploited. According to the literature, titanium dental implants, considered biocompatible with the human body, under certain conditions, may cause inflammatory or allergic reactions. The aim of the study has been to evaluate the content of titanium in the mucosa covering two-stage intraosseous implants of the Osteoplant-Hex® system. The content of titanium ions in the examined samples containing segments of mucosa collected from those dental implants was determined with an inductively-coupled plasma emission spectrometer VISTA-MPX produced by VARIAN ICP. A diverse titanium content in the mucosa adjoining the implants has been revealed during their healing period. The determined concentration of titanium ranged from 0.00 to 122.59 μg g–1. As the conducted research suggests, such a wide range may result from differences in the implant location, sex and age of patients. Therefore, the authors tried to find a relationship between the results and those variables.
3

New ketoimine sorbents in solid phase extraction of HPLC analysis of bisphenol A and other 'endocrine disrupting' residues in drinking water

100%
Szymanski A., Rykowska I., Wasiak W.
Polish Journal of Environmental Studies
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2006
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tom 15
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nr 3
Our study was undertaken to compare the behaviour and properties of two new ketoimine sorbents with a commercial sorbent C-18. The sorbents were used to concentrate the endocrine-disrupting compounds (EDCs) in the water, by the use at solid phase extraction (SPE). EDCs were analyzed by high performance liquid chromatography (HPLC) coupled to UV detection. The residues of bisphenol A, bisphenol A diglycidyl ether, bisphenol F and bisphenol F diglycidyl ether in the water having contact with polycarbonate plastic have been determined. The applicable concentration range was 0.5 to 100 µg/l in water samples. Detection limits were of about 0.20 µg/l for BPA and BPF, and 0.50 µg/l for diglycidyl ether derivatives. The recovery of bisphenol A introduced into water ranged from 93.3% to 97.0%, of BPF from 91.6% to 95.9%, of BADGE from 82.0% to 86.4%, and of BFDGE from 79.7 to 82.5%. The proposed method is simple and sensitive, and thus well suited for analysis of ECDs in the water.
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