A Theoretical Analysis of the Influence of Electroosmosis on the Effective Ionic Mobility in Capillary Zone Electrophoresis

Hijnen, H.J.M.

doi:10.1021/ed086p869

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…When the sample is injected into the capillary, charged analytes will migrate under the influence of the applied electric field and the separation of the analytes occurs as a result of a difference in ionic mobility. 21 The separation of analytes is also influenced by the electroosmotic flow, which is a result of the small surface charge on the wall of the capillary. Elution of anions such as nitrate, nitrite and bromate might vary depending on certain factors, including applied voltage, background www.soci.org ZN Tembo, SF Aygun wileyonlinelibrary.com/jsfa electrolyte properties such as viscosity and ionic strength.…”

Section: Methods Development and Optimizationmentioning

confidence: 99%

Capillary electrophoretic method for the simultaneous determination of nitrate, nitrite and bromate ions in some selected plants

Tembo

Aygün

2021

J Sci Food Agric

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BACKGROUND: Teas and traditional herbs are taken as health remedies in most cultures worldwide. Plants often used in the manufacture of teas and herbal remedies can comprise carcinogenic contaminates, such as nitrates, nitrites and bromate ions. In the present study, a quick method was applied for the simultaneous determination of nitrate (NO 3 − ), nitrite (NO 2 −) and bromate (BrO 3 − ) ions in some selected plants and tea samples using capillary electrophoresis and a Box-Behnken response surface design for method optimization.RESULTS: Optimal conditions of 60 mmol L -1 phosphate buffer solution at pH 3.5, a capillary temperature of 40°C, applied voltage of −22.5 kV, total capillary length of 61.5 cm (effective length 53.5 cm) with capillary internal diameter of 50 ∼m, and an injection pressure of 50 mbar for 30 s were selected. The limits of detection for nitrate, bromate and nitrite were 0.49, 1.25 and 0.11 mg L −1 , whereas linearity values were determined as 0.998, 0.996 and 0.999, respectively. CONCLUSION: A quick and easy applicable method was developed and the detection of the anions was achievable within 6 min of analysis. From the studied samples (cherry stalk, a dry mixed herbal tea; cherry stalk, dry sticks; dry pomegranate flower; dry olive leaves; and black tea), dry pomegranate flower (13.10 ± 0.62 mg L −1 ) and cherry stalk, dry mix herbal tea (13.10 ± 0.62 mg L −1 ) had the highest nitrate content.

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Section: Methods Development and Optimizationmentioning

confidence: 99%

Capillary electrophoretic method for the simultaneous determination of nitrate, nitrite and bromate ions in some selected plants

Tembo

Aygün

2021

J Sci Food Agric

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“…The theory of migration in free solution CE is simple to explain; however, students often lack a conceptual understanding of these transport mechanisms and are not able to predict the order of analyte migration prior to beginning a laboratory experiment. To strengthen students’ comprehension of the fundamental mechanisms of CE separations, several prelaboratory tutorials or dry labs may be utilized ,,,,,,,− . Laboratory activities that stress the analyte migration order may be administered before sample analyses.…”

Section: Teaching Fundamental Principles As Wellmentioning

confidence: 99%

Capillary Electrophoresis: Focus on Undergraduate Laboratory Experiments

Holland

2011

J. Chem. Educ.

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Capillary electrophoresis is a versatile technique well suited to teach concepts that are fundamental to a chemistry degree program. The applicability of capillary electrophoresis to metabolites, DNA, proteins, pharmaceutical compounds, environmental contaminants, or components of foods and beverages makes it a desirable tool in the chemical laboratory to teach students how to use different instrumentation for sample analyses.

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A Theoretical Analysis of the Influence of Electroosmosis on the Effective Ionic Mobility in Capillary Zone Electrophoresis

Cited by 2 publications

References 15 publications

Capillary electrophoretic method for the simultaneous determination of nitrate, nitrite and bromate ions in some selected plants

Capillary electrophoretic method for the simultaneous determination of nitrate, nitrite and bromate ions in some selected plants

Capillary Electrophoresis: Focus on Undergraduate Laboratory Experiments

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