Vortex-Assisted Acid-Induced Cloud Point Extraction Coupled With Spectrofluorometry for the Determination of Fluoroquinolones in Environmental Water Samples

Xia, Qinghai; Yang, Yongjian; Liu, Mousheng

doi:10.1080/00387010.2013.790063

Cited by 16 publications

(4 citation statements)

References 21 publications

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“…The most preferable is the neutral form [ 1 , 2 ]. On the other hand, Xia et al [ 9 ] conducted the CPE with sodium dodecyl sulfate for norfloxacin, ciprofloxacin, sarafloxacin, and gatifloxacin in extreme acid pH (at 12 M hydrochloric acid). The addition of hydrochloric acid promoted phase separation and reduced the volume of the surfactant-rich phase.…”

Section: Discussionmentioning

confidence: 99%

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The Chemometric Evaluation of the Factors Influencing Cloud Point Extraction for Fluoroquinolones

Michałowska,

Kupczyk,

Czyrski

2023

Pharmaceutics

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This study aimed to analyze the factors that impact the cloud point extraction of ciprofloxacin, levofloxacin, and moxifloxacin. The following independent variables were analyzed: Triton X-114 concentration, NaCl concentration, pH, and incubation temperature. The dependent variable studied was recovery. A central composite design model was used. The applied quantitation method was HPLC. The method was validated for linearity, precision, and accuracy. The results underwent ANOVA® analysis. The polynomial equations were generated for each analyte. The response surface methodology graphs visualized them. The analysis showed that the factor most affecting the recovery of levofloxacin is the concentration of Triton X-114, while the recovery of ciprofloxacin and moxifloxacin is most affected by pH value. However, the concentration of Triton X-114 also plays an important role. The optimization resulted in the following recoveries: for ciprofloxacin, 60%; for levofloxacin, 75%; and for moxifloxacin, 84%, which are identical to those estimated with regression equations—59%, 74% and 81% for ciprofloxacin, levofloxacin, and moxifloxacin, respectively. The research confirms the validity of using the model to analyze factors affecting the recovery of the analyzed compounds. The model allows for a thorough analysis of variables and their optimization.

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Section: Discussionmentioning

confidence: 99%

“…Vitamins A, E, and K were determined in aqueous solutions, plasma, and urine [ 4 ]. Fluoroquinolones were determined in the environmental water samples [ 9 ], plasma, and urine [ 10 ]. CPE was also applied to determine cetylpyridinium chloride in the pharmaceutical formulations [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

The Chemometric Evaluation of the Factors Influencing Cloud Point Extraction for Fluoroquinolones

Michałowska,

Kupczyk,

Czyrski

2023

Pharmaceutics

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“…For the determination of CIP, wide ranges of analytical approaches have been employed, namely, HPLC [5][6][7], LC [8], spectrofluorometry [9], fluorometry [10], spectrophotometry [11], colorimetry, and capillary zone electrophoresis [12,13]. Since these traditional techniques are costly and time-consuming, they require a highly skilled technician to monitor, and some of the techniques are associated with complex procedures.…”

Section: Introductionmentioning

confidence: 99%

Sodium Dodecyl Sulfate–Mediated Graphene Sensor for Electrochemical Detection of the Antibiotic Drug: Ciprofloxacin

et al. 2022

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The present study involves detecting and determining CIP by a new electrochemical sensor based on graphene (Gr) in the presence of sodium dodecyl sulfate (SDS) employing voltammetric techniques. Surface morphology studies of the sensing material were analyzed using a scanning electron microscope (SEM) and atomic force microscope (AFM). In the electroanalysis of CIP at the developed electrode, an enhanced anodic peak response was recorded, suggesting the electro-oxidation of CIP at the electrode surface. Furthermore, we evaluated the impact of the electrolytic solution, scan rate, accumulation time, and concentration variation on the electrochemical behavior of CIP. The possible electrode mechanism was proposed based on the acquired experimental information. A concentration variation study was performed using differential pulse voltammetry (DPV) in the lower concentration range, and the fabricated electrode achieved a detection limit of 2.9 × 10−8 M. The proposed sensor detected CIP in pharmaceutical and biological samples. The findings displayed good recovery, with 93.8% for tablet analysis and 93.3% to 98.7% for urine analysis. The stability of a developed electrode was tested by inter- and intraday analysis.

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“…Chemical methods for initiating CPE are more typical when anionic surfactants are used. 1,9 In the case of non-ionic surfactants, the chemical initiation of CPE has been little studied. A number of studies have described that sodium sulfate introduction leads to immediate formation of the surfactant rich phase.…”

Section: Introductionmentioning

confidence: 99%

Room temperature cloud point extraction: An application to preconcentration and spectrophotometric determination of copper(II)

et al. 2020

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The novel cloud point extraction procedure for preconcentration of copper(II) was discovered. A simple chemical method for initiating the cloud point extraction (CPE) has been proposed. The formation of surfactant rich phase in a system containing a nonionic surfactant Triton X-100, copper(II), 6,7-dihydroxy-4-methyl-2-phenylbenzopyrilium chloride (DHMPhB) and ammonium benzoate is observed immediately upon the sulfuric acid addition into solution. Under the optimal conditions (absorption band maximum was 540 nm, concentration 1.5×10-4 mol dm-3 of DHMPhB, 1.0 vol.% of Triton X-100, 2.0 cm 3 of 0.75 mol dm-3 ammonium benzoate, and 1.0 cm 3 of 0.5 mol dm-3 sulfuric acid solution for obtaining benzoic-benzoate buffer solution with pH 4.5 and initiation immediate surfactant rich phase formation) the calibration plot for spectrophotometric determination of copper(II) was linear in the range of copper(II) concentration 0.02-0.95 µg cm −3. The limit of detection was calculated 0.006 µg cm −3. The water samples were analyzed according to a suggested procedure with satisfactory results.

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Vortex-Assisted Acid-Induced Cloud Point Extraction Coupled With Spectrofluorometry for the Determination of Fluoroquinolones in Environmental Water Samples

Cited by 16 publications

References 21 publications

The Chemometric Evaluation of the Factors Influencing Cloud Point Extraction for Fluoroquinolones

The Chemometric Evaluation of the Factors Influencing Cloud Point Extraction for Fluoroquinolones

Sodium Dodecyl Sulfate–Mediated Graphene Sensor for Electrochemical Detection of the Antibiotic Drug: Ciprofloxacin

Room temperature cloud point extraction: An application to preconcentration and spectrophotometric determination of copper(II)

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