Identification of photochemical methylation products of tin(ii) in aqueous solutions using headspace SPME coupled with GC-FPD or GC–MS

Chen, Baowei; Wang, Thanh; Yin, Yongguang; He, Bin; Jiang, Guibin

doi:10.1039/c2ay00003b

Cited by 7 publications

(5 citation statements)

References 45 publications

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“…The pH and salinity are widely considered to be important factors influencing element methylation in aqueous solution (Chen et al, 2006(Chen et al, , 2007a(Chen et al, ,b, 2012Yin et al, 2012). Therefore, the influences of salinity and pH on the photo-methylation of inorganic Hg were also investigated in the present study, and the results are shown in Fig.…”

Section: The Effects Of Different Influencing Factorsmentioning

confidence: 93%

Identification of mercury methylation product by tert-butyl compounds in aqueous solution under light irradiation

Chen

et al. 2015

Marine Pollution Bulletin

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a b s t r a c tThe methylation of mercury (Hg) is of great concern as methylmercury (MeHg), the most toxic species, is produced. This study examined the possibilities of tert-butyl compounds (tert-butyl alcohol (TBA) and tert-butyl hydroperoxide (TBH)) and other alcohols serving as methyl donors for Hg photo-methylation under light irradiation. The yield of MeHg varied among the methyl donors, and it was also significantly influenced by salinity and pH. MeHg could be generated in the presence of TBH under visible light irradiation. The hydroxyl radical ( Å OH) was found to promote MeHg production at low levels, but degrade MeHg in excess. The photo-production of MeHg was tentatively proposed via the complexation of Hg and methyl donors, the formation of an intermediate (, and the intramolecular methyl transfer from methyl donors to Hg. This study implicates photoreactions between Hg and organic pollutants in understanding the fate and transformation of Hg in the aquatic environment.

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Section: The Effects Of Different Influencing Factorsmentioning

confidence: 93%

Identification of mercury methylation product by tert-butyl compounds in aqueous solution under light irradiation

Chen

et al. 2015

Marine Pollution Bulletin

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“…ПДК различных форм олова в водах объектов рыбохозяйственного назначения [9] Table 1 MPC of various forms of tin in the waters of fishery facilities [9] Вещество ПДК, мкг/дм 3 оловооорганические соединения [14,15]. Авторами [16] обсуждены возможности и ограничения прямого определения неорганического олова в водах Черного и Азовского морей методами масс-спектрометрии с индуктивно-связанной плазмой (ИСП-МС) и атомно-эмиссионной спектрометрии с индуктивно-связанной плазмой (ИСП-АЭС) без использования приемов разделения и концентрирования аналита.…”

Section: таблицаunclassified

ICP-spectrometric determination of the total tin content in the water of the Azov and Black Seas

Темердашев¹,

Abakumov²,

Abakumova³

2022

АиК

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The paper considers the possibility of determining the total content of tin in various forms of presence in the waters of the Azov and Black Seas, which differ in salinity. Organotin compounds, when present in waters, interfere with the determination of inorganic forms of tin by direct injection by ICP spectrometry. It is shown that before determining the total content of tin in various forms of presence in waters with organotin compounds, microwave mineralization of the analyzed samples is required, under which a quantitative conversion to the inorganic form of tin is ensured. The highest efficiency of decomposition of water samples was achieved using oxidizing mixtures based on nitric acid (5.0 см3 HNO3; 4.0 см3 HNO3 + 1.0 см3 HCl и 3.0 см3 HNO3 + 2.0 см3 H2О2). Limits for the determination of tin (LOQSn) in solutions prepared in deionized and model sea waters with different salinities have been established. According to the proposed scheme of analysis for ICP-AES, the LOQSn values in water samples from the Azov and Black Seas were 0.40 and 0.47 µg/dm3, respectively, with direct injection of the sample. In the ICP-MS determination of LOQSn also increases with increasing water salinity and ranges from 0.03 (deionized water) to 0.45 μg/dm3 (model sea water with a salinity of 18 ‰). The developed scheme of analysis made it possible to determine the total content of tin, considering all forms of its presence in sea waters. Satisfactory convergence of the results of analyzes after microwave mineralization of waters is observed for ICP-AES determination of the total tin content in the range from 0.45 to 10.0 μg/dm3, and for ICP-MS in the range from 0.40 to 5.00 μg/dm3. In the analyzed water samples of the Azov and Black Seas, the total tin content was found to be 0.20 and 0.23 µg/dm3, respectively.

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“…Inorganic tin compounds are considered relatively non-toxic, and their content in waters is not standardized, except for fishery waters [ 7 ]. However, the inorganic speciation of tin can be subjected to biomethylation and transform into OTC, which are characterized by higher toxicity [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Possibilities and Limitations of ICP-Spectrometric Determination of the Total Content of Tin, Its Inorganic and Organic Speciations in Waters with Different Salinity Levels—Part 1: Determination of the Total Tin Content

et al. 2023

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This paper considers the features of determining the total tin content in waters with different salinity. Direct ICP-spectrometric analysis of sea waters with a salinity of more than 6‰ significantly reduced the analytical signal of tin by 70% (ICP-MS) and 30% (ICP-OES). The matrix effect of macrocomponents was eliminated by generating hydrides using 0.50 M sodium borohydride and 0.10 M hydrochloric acid. The effect of transition metals on the formation of tin hydrides was eliminated by applying L-cysteine at a concentration of 0.75 g/L. The total analyte concentrations, considering the content of organotin compounds, were determined after microwave digestion of sample with oxidizing mixtures based on nitric acid. The generation of hydrides with the ICP-spectrometric determination of tin leveled the influence of the sea water matrix and reduced its detection limit from 0.50 up to 0.05 µg/L for all digestion schemes. The developed analysis scheme made it possible to determine the total content of inorganic and organic forms of tin in sea waters. The total content of tin was determined in the waters of the Azov and Black seas at the levels of 0.17 and 0.24 µg/L, respectively.

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Identification of photochemical methylation products of tin(ii) in aqueous solutions using headspace SPME coupled with GC-FPD or GC–MS

Cited by 7 publications

References 45 publications

Identification of mercury methylation product by tert-butyl compounds in aqueous solution under light irradiation

Identification of mercury methylation product by tert-butyl compounds in aqueous solution under light irradiation

ICP-spectrometric determination of the total tin content in the water of the Azov and Black Seas

Possibilities and Limitations of ICP-Spectrometric Determination of the Total Content of Tin, Its Inorganic and Organic Speciations in Waters with Different Salinity Levels—Part 1: Determination of the Total Tin Content

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