scholarly journals Application of Capillary Zone Electrophoresis Coupled with a Diode Array Detector (CZE-DAD) for Simultaneous Analysis of Ibuprofen and Phenylephrine

2019 ◽  
Vol 102 (2) ◽  
pp. 473-479 ◽  
Author(s):  
Marwa A A Ragab ◽  
Mohamed H Abdel-Hay ◽  
Hytham M Ahmed ◽  
Sara M Mohyeldin
Keyword(s):  
Binary Mixture ◽  
Capillary Zone Electrophoresis ◽  
High Efficiency ◽  
Fused Silica ◽  
Simultaneous Analysis ◽  
Array Detector ◽  
Diode Array ◽  
Diode Array Detector ◽  
Zone Electrophoresis ◽  
Capillary Zone

Abstract Background: A validated method based on capillary zone electrophoresis coupled with a diode array detector (CZE-DAD) was investigatedfor analyzing binary mixture of ibuprofen (IBU) andphenylephrine (PHE) in their bulk and combined dosage form. Objective: This binary mixture is a challenging one as IBU is acidic and PHEis alkaline, which may affect their simultaneous analysis using CZE. The literature lacks any CZE report for IBU and PHE simultaneous analysis. Methods: Fused silica capillary (85 cm × 75 μm id) was used, and the electrolyte was a 50 mM borate buffer adjusted to pH 11 with 0.5 M NaOH. Results: The concentration ranges were 5–200 and 5–100 μg/mL for IBU and PHE, respectively, using CZE. High efficiency was achieved (N > 92990). Reasonable migration time (tm) was attained (tm< 8.5 min). Conclusions: Although the results obtained by the proposed CZE method and reported HPLC method were statistically comparable, the proposed method showed lower linearity ranges, higher efficiency, and a more reasonable run time. Highlights: CZE-DAD was used for the analysis of IBU and PHE in bulk and tablets, as no report was foundfor their determination using CZE. Binary mixture is challenging due to differences in chemical and physical properties. A detailed discussion of electrophoretic parameters optimization is included. Confirmation of peak purity was attained using DAD.

scholarly journals Determination of Chlorinated Phenols in Water and Soil by Capillary Zone Electrophoresis

1997 ◽  
Vol 80 (6) ◽  
pp. 1308-1314 ◽  
Author(s):  
Wayne E Rae ◽  
Charles A Lucy
Keyword(s):  
Capillary Zone Electrophoresis ◽  
Fused Silica ◽  
Soil Samples ◽  
Chlorinated Phenols ◽  
Relative Standard ◽  
Zone Electrophoresis ◽  
Water And Soil Samples ◽  
Fused Silica Capillary ◽  
Capillary Zone

Abstract A capillary zone electrophoresis (CZE) method was developed to separate and determine chlorinated phenols in water and soil samples. A mixture of 16 chlorinated phenols was resolved in 25 min by using a 77 cm (70 cm to detector) × 75 μm fused silica capillary with 0.015M tetraborate/0.045M phosphate (pH 7.3) buffer at 22 kV. Calibration linearities for water samples in the low parts-permillion range were good (correlation coefficient > 0.99) for all solutes except p-chlorophenol. Average precision was 17% relative standard deviation. Typical detection limits were in the 200 μg/L range. Recoveries of chlorinated phenols from synthetic soil samples with methanol were quantitative.

scholarly journals Detection of Cymbidium Mosaic Potexvirus and Odontoglossum Ringspot Tobamovirus Using Immuno-Capillary Zone Electrophoresis

1999 ◽  
Vol 89 (6) ◽  
pp. 522-528 ◽  
Author(s):  
Alvin Jin-Cherng Eun ◽  
Sek-Man Wong
Keyword(s):  
Capillary Zone Electrophoresis ◽  
Chenopodium Quinoa ◽  
Diagnostic Technique ◽  
Plant Viruses ◽  
Fused Silica ◽  
Zone Electrophoresis ◽  
Fused Silica Capillary ◽  
Capillary Zone ◽  
Antibody Complex ◽  
Multiple Samples

Immuno-capillary zone electrophoresis (I-CZE) is a technique that combines the specificity afforded by serological assays with the sensitivity, rapidity, and automation in detection provided by capillary zone electrophoresis. Cymbidium mosaic potexvirus (CymMV) and odontoglossum ringspot tobamovirus (ORSV) were detected in their purified forms as well as in the crude saps of infected Nicotiana benthamiana leaves and Oncidium orchid flowers. The two orchid virus-antibody complexes were resolved via the combined actions of electrophoretic migration and electro-osmotic flow along a buffer-filled, uncoated fused-silica capillary. The I-CZE fractions collected from both CymMV- and ORSV-antibody complex peaks, as well as the RNA purified from them, retained their infectivity upon inoculation onto Chenopodium quinoa. I-CZE assays were able to detect as little as 10 fg each of both CymMV and ORSV in their purified forms as well as in the crude saps of infected N. benthamiana and Oncidium orchid. As multiple samples can be analyzed rapidly, I-CZE offers an ideal diagnostic technique for routine mass-indexing programs such as virus-free certification, breeding for virus-resistant cultivars, plant quarantine, and germ plasm screening. This is the first report of the application of I-CZE for the detection of plant viruses.

scholarly journals Determination of Carbohydrate-deficient Transferrin Using Capillary Zone Electrophoresis

2001 ◽  
Vol 47 (2) ◽  
pp. 247-255 ◽  
Author(s):  
Birgitte Wuyts ◽  
Joris R Delanghe ◽  
Ishmael Kasvosve ◽  
Annick Wauters ◽  
Hugo Neels ◽  
...  
Keyword(s):  
Capillary Zone Electrophoresis ◽  
Sample Pretreatment ◽  
Fused Silica ◽  
Exchange Chromatography ◽  
Buffer System ◽  
Good Precision ◽  
Deming Regression ◽  
Zone Electrophoresis ◽  
Carbohydrate Deficient Transferrin ◽  
Capillary Zone

Abstract Background: Current methods for carbohydrate-deficient transferrin (CDT) often suffer from low precision, complexity, or risk of false positives attributable to genetic variants. In this study, a new capillary zone electrophoresis (CZE) method for CDT was developed. Methods: CZE was performed on a P/ACE 5000 using fused-silica capillaries [50 μm (i.d.) × 47 cm] and the CEOFIX CDT buffer system with addition of 50 μL of anti-C3c and 10 μL of anti-hemoglobin. Native sera were loaded by high-pressure injection for 3 s, separated at 28 kV over 12 min, and monitored at 214 nm. Results: CDT was completely resolved by differences in migration times (di-trisialotransferrin, 9.86 ± 0.05 min; monosialotransferrin, 9.72 ± 0.05 min; asialotransferrin, 9.52 ± 0.04 min), with a CV of 0.15%. The number of theoretical plates was 312 000 ± 21 000 for the mono- and 199 000 ± 6500 for the di-trisialylated transferrin. Genetic CB and CD variants showed prominent peaks with migration times of 10.12 ± 0.06 and 9.89 ± 0.03 min, respectively, and the carbohydrate-deficient glycoprotein syndrome could be detected, excluding false-positive results. CZE results (as a percentage; y) correlated with the Axis %CDT TIATM (x) values by Deming regression analysis: y = 1.92x − 7.29; r = 0.89. CDT values in 130 healthy nonalcoholics were determined. The 2.5th and 97.5th percentiles were 1.84% and 6.79%. Conclusions: CZE without sample pretreatment can determine CDT with good precision, allows detection of variants, and correlates with ion-exchange chromatography.

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