Optical Emission Inductively Coupled Plasma in Environmental Analysis

Tatro, Mark E.; Amarasiriwardena, Dulasiri

doi:10.1002/9780470027318.a0848.pub3

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…The accuracy of the ICP‐OES analytical protocol was evaluated via analysis of certified reference standard materials (Tatro & Amarasiriwardena, 2016 ).…”

Section: Methodsmentioning

confidence: 99%

Influence of gender and combined estrogen–progestin oral contraceptive on parotid saliva flow rate, pH, and electrolytes concentration

Rovera,

Anderson

2023

Clinical & Exp Dental Res

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ObjectivesEndocrinal variations within an individual impact the electrolyte composition, pH, and flow‐rate (FR) of saliva. The aim of this study was to evaluate the gender‐specific differences and the effect of combined estrogen‐progestin oral contraceptives (COCs) on FR, pH, and electrolyte concentrations in the parotid saliva (PS) of a group of healthy adults.Material and MethodsStimulated PS was collected from 20 healthy adults using a Lashley cup; 11 males, 8 females, and 1 female undertaking combined contraceptive therapy (levonorgestrel/ethinyloestradiol 0.1 mg + 0.02 mg). FR and pH were recorded for each saliva sample. Electrolytes concentrations (Na+, Ca2+, K+, Mg2+) were measured using inductively coupled plasma optical emission spectrometer (ICP‐OES). Statistical analysis was performed, and the significance level was set at p < .05.ResultsPS FR varied from 0.13 to 0.42 mL/min in females not taking any medication and from 0.08 to 0.5 mL/min in males not taking any medication. PS pH of females and males not taking any medication ranged from 6.23 to 7.50 and from 6.15 to 7.55. PS pH and FR of the female taking COCs were 6.5 and 0.1 mL/min. PS pH, FR, and electrolytes concentrations (Ca2+, Na+, K+, Mg2+) were not statistically significantly different between females and males not taking any medication. PS concentrations of Ca2+ and Na+ were significantly higher in the females taking COCs than in the females not taking any medication. Whereas, concentrations of K+ and Mg2+ did not differ significantly between the females taking COCs and the females not taking any medication.ConclusionsThere are no significant gender‐specific differences in PS flow rate, pH, and electrolyte concentrations of Na+, Ca2+, Mg2+, and K+. Combined hormonal oral contraceptive has a significant effect on PS flow rate, pH, Ca2+, and Na+ concentrations. Whereas the PS concentration of K+ and Mg2+ are not influenced by COCs. These results warrant further investigation.

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“…The accuracy of the ICP‐OES analytical protocol was evaluated via analysis of certified reference standard materials (Tatro & Amarasiriwardena, 2016 ).…”

Section: Methodsmentioning

confidence: 99%

Influence of gender and combined estrogen–progestin oral contraceptive on parotid saliva flow rate, pH, and electrolytes concentration

Rovera,

Anderson

2023

Clinical & Exp Dental Res

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“…Sample aliquots were taken from the main reservoirs (Figure ) before beginning each experiment and were stored at 4 °C prior to analytical analysis, which was used to determine the ionic concentrations of constituent ions of each electrolyte used in the experiments. All aliquots were analyzed using ion chromatography (Eith et al, ; Jackson, ), titration for carbonate and bicarbonate analysis (Franson, ), and inductively coupled plasma atomic emission spectroscopy (Tatro & Amarasiriwardena, ) for silica, strontium, and barium. The average ionic composition of the groundwater and seawater are shown in SI Text S2.…”

Section: Methodsmentioning

confidence: 99%

Characterizing the Self‐Potential Response to Concentration Gradients in Heterogeneous Subsurface Environments

et al. 2019

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Self‐potential (SP) measurements can be used to characterize and monitor, in real‐time, fluid movement and behavior in the subsurface. The electrochemical exclusion‐diffusion (EED) potential, one component of SP, arises when concentration gradients exist in porous media. Such concentration gradients are of concern in coastal and contaminated aquifers and oil and gas reservoirs. It is essential that estimates of EED potential are made prior to conducting SP investigations in complex environments with heterogeneous geology and salinity contrasts, such as the UK Chalk coastal aquifer. Here we report repeatable laboratory estimates of the EED potential of chalk and marls using natural groundwater (GW), seawater (SW), deionized (DI) water, and 5 M NaCl. In all cases, the EED potential of chalk was positive (using a GW/SW concentration gradient the EED potential was ca. 14 to 22 mV), with an increased deviation from the diffusion limit at the higher salinity contrast. Despite the relatively small pore size of chalk (ca. 1 μm), it is dominated by the diffusion potential and has a low exclusion efficiency, even at large salinity contrasts. Marl samples have a higher exclusion efficiency which is of sufficient magnitude to reverse the polarity of the EED potential (using a GW/SW concentration gradient the EED potential was ca. −7 to −12 mV) with respect to the chalk samples. Despite the complexity of the natural samples used, the method produced repeatable results. We also show that first order estimates of the exclusion efficiency can be made using SP logs, supporting the parameterization of the model reported in Graham et al. (2018, https://doi.org/10.1029/2018WR022972), and that derived values for marls are consistent with the laboratory experiments, while values derived for hardgrounds based on field data indicate a similarly high exclusion efficiency. While this method shows promise in the absence of laboratory measurements, more rigorous estimates should be made where possible and can be conducted following the experimental methodology reported here.

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“…Известно, что использование аксиального (осевого) способа наблюдения плазмы (обзора) позволяет повысить чувствительность благодаря увеличению проецируемой на входную щель спектрометра области излучения атомов [7]. Наряду с повышением чувствительности существуют некоторые недостатки использования аксиального обзора, связанные со спектральными наложениями и матричными влияниями [8,9].…”

Section: Introductionunclassified

Research of Radial View of Spectrum Excitation Source Based on Microwave Plasma

Pelipasov

Komin

2019

Interexpo GEO-Siberia

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The results of the research of the radial method of observation of the spectrum excitation source based on microwave plasma (MP) are presented in the article. Using of a combination of a three-slot torch and a longitudinal magnetic microwave field for the formation of MP makes it possible to obtain an axisymmetric plasma shape similar to ICP flame. The visual similarity of the MP and ICP confirms the existence of various analytical zones in plasma, both in height (with a radial view) and radius (with an axial view) caused by differences in temperature and electron density in the observed zones. Using of the radial method of MP observation makes it possible to increase the ratio of the intensities of the spectral lines to MP background for some elements and to reduce the detection limits achieved with the axial method of observation, especially when analyzing highly mineralized samples with a total mineralization of more than 1 % wt. Another important advantage of the radial method of MP observation in comparison with the axial is the increase of the linearity range of the calibration curve.

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Optical Emission Inductively Coupled Plasma in Environmental Analysis

Cited by 4 publications

References 35 publications

Influence of gender and combined estrogen–progestin oral contraceptive on parotid saliva flow rate, pH, and electrolytes concentration

Influence of gender and combined estrogen–progestin oral contraceptive on parotid saliva flow rate, pH, and electrolytes concentration

Characterizing the Self‐Potential Response to Concentration Gradients in Heterogeneous Subsurface Environments

Research of Radial View of Spectrum Excitation Source Based on Microwave Plasma

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