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Development and Validation of an Automated Zone Fluidics-Based Sensor for In Vitro Dissolution Studies of Captopril Using Total Error Concept. Molecules 2021; 26:molecules26040824. [PMID: 33562585 PMCID: PMC7914990 DOI: 10.3390/molecules26040824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/02/2021] [Accepted: 02/02/2021] [Indexed: 11/16/2022] Open
Abstract
In the present research, a zone fluidics-based automated sensor for the analysis of captopril in in vitro dissolution samples is reported. Captopril is reacted under flow conditions with Ni(II) (10 mmol L-1) in alkaline medium (0.15% v/v NH3) to form a stable derivate, which is monitored spectrophotometrically at 340 nm. The chemical and instrumental parameters were carefully investigated and optimized. The validation of the developed method was performed in the range of 5 to 120% of the expected maximum concentration using the accuracy profiles as a graphical decision-making tool. The β-expectation tolerance intervals did not exceed the acceptance criteria of ±10%, which means that 95% of future results will be encompassed in the defined bias limits. The variation of the relative bias ranged between -2.3% and 3.5% and the RSD values for repeatability and intermediate precision were lower than 2.3% in all cases. The limit of detection (LOD), and the lower and the upper limit of quantification (LLOQ, ULOQ) were satisfactory and found to be 1%, 5% and 120% (corresponding to 0.6, 2.78 and 66.67 μg mL-1 in dissolution medium). The developed method was successfully applied for the analysis of captopril in dissolution tests of two commercially available batches.
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A chemiluminescence reagent free method for the determination of captopril in medicine and urine samples by using trivalent silver. J Pharm Anal 2018; 7:252-257. [PMID: 29404046 PMCID: PMC5790706 DOI: 10.1016/j.jpha.2017.05.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 04/14/2017] [Accepted: 05/19/2017] [Indexed: 11/22/2022] Open
Abstract
A novel flow-injection chemiluminescence (FI-CL) method free of CL reagent was developed for the determination of captopril based on its enhancing effect on the CL derived from diperiodatoargentate(III)-sulfuric acid system. Compared with the conventional CL system, the CL system based on trivalent silver was characterized of good selectivity for the absence of CL reagent. The CL mechanism was discussed through CL spectra and UV-vis absorption spectra. The conditions of the FI-CL system were investigated and optimized. Under the optimal conditions, the relative CL intensity was linear with the captopril concentration in the range of 0.3-15.0 μg/mL. The detection limit for captopril was 0.05 μg/mL, and the relative standard deviation (n=11) was 2.0% for 5.0 μg/mL captopril. The proposed method was applied to the analysis of captopril in tablet and human urine with the recoveries of 83.1%-112.5%, and the relative standard deviations of 0.5%-4.4%. The results obtained by the proposed method agreed well with those obtained from HPLC method. The proposed method is fast, convenient, and cost-effective for the determination of captopril in medicine and biological samples.
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Xiao SJ, Zhao XJ, Chu ZJ, Xu H, Liu GQ, Huang CZ, Zhang L. New Off-On Sensor for Captopril Sensing Based on Photoluminescent MoO x Quantum Dots. ACS OMEGA 2017; 2:1666-1671. [PMID: 31457531 PMCID: PMC6640937 DOI: 10.1021/acsomega.7b00088] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 04/11/2017] [Indexed: 05/27/2023]
Abstract
Molybdenum oxide nanomaterials have recently attracted widespread attention for their unique optical properties and catalytic performance. However, until now, there is little literature on the application of photoluminescent molybdenum oxide nanomaterials in biological and pharmaceutical sensing. Herein, photoluminescent molybdenum oxide quantum dots (MoO x QDs) were synthesized via a facile method, and then, the synthesized MoO x QDs were further applied as a new type of photoluminescent probe to design a new off-on sensor for captopril (Cap) determination on the basis of the fact that the quenched photoluminescence of MoO x QDs by Cu2+ was restored with Cap through specific interaction between the thiol group of Cap and Cu2+. Under optimal conditions, the restored photoluminescence intensity showed a good linear relationship with the content of Cap, ranging from 1.0 to 150.0 μM, with a limit of detection of 0.51 μM (3σ/k). Additionally, the content of Cap in pharmaceutical samples was successfully detected with the newly developed off-on sensor, and the recoveries were 99.4-101.7%, which suggest that the present off-on sensor has a high accuracy.
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Affiliation(s)
- Sai Jin Xiao
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Xiao Jing Zhao
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Zhao Jun Chu
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Han Xu
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Guo Qing Liu
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
| | - Cheng Zhi Huang
- School
of Chemistry, Biology and Material Science and Jiangxi Key Laboratory of Mass
Spectrometry and Instrumentation, East China
University of Technology (ECUT), Nanchang 330013, Jiangxi
Province, China
- College
of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
| | - Li Zhang
- College
of Chemistry, Nanchang University, Nanchang 330031, Jiangxi Province, China
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