scholarly journals Evaluation of human exposure to parabens in north eastern Poland through hair sample analysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Joanna Wojtkiewicz ◽  
Manolis Tzatzarakis ◽  
Elena Vakonaki ◽  
Krystyna Makowska ◽  
Slawomir Gonkowski
Keyword(s):  
Liquid Chromatography Mass Spectrometry ◽  
Internal Organs ◽  
Mass Spectrometry Technique ◽  
Hair Samples ◽  
North Eastern ◽  
Spectrometry Technique ◽  
The Mean ◽  
Living Organisms ◽  
Mean Concentration ◽  
Concentration Levels

AbstractParabens (PBs) are a group of substances commonly used in industry. They also pollute the environment, penetrate into living organisms and adversely affect various internal organs. During this study, the degree of exposure of people living in Olsztyn, a city in north eastern Poland, to selected parabens most often used in industry was studied. The chemicals under investigation included: methyl paraben—MePB, ethyl paraben—EtPB, propyl paraben—PrPB, benzyl paraben BePB and butyl paraben -BuPB. To this aim, hair samples collected from the scalps of 30 volunteers were analyzed using a liquid chromatography–mass spectrometry technique. All PBs studied were present in a high percentage of analyzed samples (from 76.7% in the case of BePB to 100% in the case of MePB and PrPB). The mean concentration levels were 4425.3 pg/mg for MeBP, 704.0 pg/mg for EtPB, 825.7 pg/mg for PrPB, 135.2 pg/mg for BePB and 154.5 pg/mg for BuPB. Significant differences in PB concentration levels between particular persons were visible. On the other hand, gender, age and artificial hair coloring did not cause statistically significant differences in PB levels. Obtained results have clearly indicated that people living in north eastern Poland are exposed to various PBs, and therefore these substances may affect their health status. However, the evaluation of PBs influence on human health requires further research.

scholarly journals Concentration of some metals in the muscles of fish from selected lakes of Warmia and Mazury region (Poland)

2013 ◽  
Vol 82 (1) ◽  
pp. 67-71 ◽  
Author(s):  
Anna Spodniewska ◽  
Dariusz Barski
Keyword(s):  
Heavy Metals ◽  
Muscle Tissue ◽  
Absorption Spectrometry ◽  
Limited Information ◽  
The European Union ◽  
Fish Muscles ◽  
Tolerable Weekly Intake ◽  
North Eastern ◽  
The Mean ◽  
Mean Concentration

In view of very scarce and limited information concerning the content of heavy metals in tissues of fish from the lakes in north-eastern Poland, the aim of the study was to determine the content of some heavy metals in the muscle tissue of two fish species: bream (Abramis brama) (n = 60) and pikeperch (Sander lucioperca) (n = 60) caught in selected lakes of Warmia and Mazury region (Poland) in 2010 as well as to asses human health safety. The concentration of lead (Pb), mercury (Hg), copper (Cu), iron (Fe) and zinc (Zn) in the muscle tissue of bream and pikeperch was determined by atomic absorption spectrometry. The mean concentration of toxic metals (Pb and Hg) in muscles of bream was 0.07 mg/kg and 0.03 mg/kg, respectively, and 0.10 mg/kg and 0.13 mg/kg in muscles of pikeperch, respectively. The mean concentration of Cu, Fe and Zn found in the muscles of bream was 0.33 mg/kg, 7.27 mg/kg and 6.12 mg/kg in muscles of pikeperch it was 0.21 mg/kg, 5.56 mg/kg and 6.02 mg/kg, respectively. It was found that the content of the analysed metals in fish muscles was low and did not exceed the values of limits admissible in the European Union. At the assumed mean and maximum concentration of Pb and Hg, the values of PTWI (provisional tolerable weekly intake) were not exceeded (i.e. 0.56% PTWI for Pb and 3.01% PTWI for Hg), therefore the consumption of fish originating from selected lakes of Warmia and Mazury does not constitute a threat to consumer health.

scholarly journals Possible Pathway for Ifosfamide Degradation via Fe-TiO2 Assisted Photo Catalysis

2018 ◽  
Vol 69 (11) ◽  
pp. 3234-3237
Author(s):  
Lucian Alexandru Constantin ◽  
Mirela Alina Constantin ◽  
Ines Nitoi ◽  
Florentina Laura Chiriac ◽  
Toma Galaon ◽  
...  
Keyword(s):  
Irradiation Time ◽  
Degradation Pathway ◽  
Aqueous System ◽  
Bulk Solution ◽  
Liquid Chromatography Mass Spectrometry ◽  
Photo Catalyst ◽  
Photo Catalysis ◽  
Mass Spectrometry Technique ◽  
Spectrometry Technique ◽  
Degradation Intermediates

Ifosfamide (IF) degradation from aqueous system via UV-Vis Fe-TiO2 system was studied for a photo catalyst dose of 200 mg/L and an irradiation time up to 240 min. IF degradation efficiency was monitored via Liquid Chromatography-Mass Spectrometry technique (LC-MS). Experimental photocatalytic tests were performed both in the absence and presence of 2-propanol and F- radicals� scavengers and the results proved that IF degradation occurs most likely in the bulk solution. Experimental results showed that degradation efficiencies for IF varied between 39.52% in the presence of 2-propanol and 70.70% in the scavengers� absence. Six degradation intermediates were identified using the same LC-MS technique and a three stage degradation pathway was proposed based on both available literature data and evolution of degradation intermediates peaks.

scholarly journals Correction: Analysis of dialkyl urine metabolites of organophosphate pesticides by a liquid chromatography mass spectrometry technique

2018 ◽  
Vol 10 (36) ◽  
pp. 4471-4471
Author(s):  
Sukesh Narayan Sinha ◽  
B. Venkat Reddy ◽  
Kasturi Vasudev ◽  
M. Vishnu Vardhana Rao ◽  
M. Noor Ahmed ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Organophosphate Pesticides ◽  
Liquid Chromatography Mass Spectrometry ◽  
Urine Metabolites ◽  
Chromatography Mass Spectrometry ◽  
Mass Spectrometry Technique ◽  
Spectrometry Technique

Correction for ‘Analysis of dialkyl urine metabolites of organophosphate pesticides by a liquid chromatography mass spectrometry technique’ by Sukesh Narayan Sinha et al., Anal. Methods, 2014, 6, 1825–1834.

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