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Al Alamein AMA, Elwy HM, El-Din SHS. Univariate and multivariate spectrophotometric methods for simultaneous determination of avobenzone and octinoxate in pure form and in cosmetic formulations: A comparative study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 206:37-47. [PMID: 30077895 DOI: 10.1016/j.saa.2018.07.073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/23/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
Simple, economic and precise spectrophotometric and chemometric techniques were used to determine UV filters namely; avobenzone (AV) and octinoxate (OCT) simultaneously in pure form and in cosmetic formulations in concentration range (2-10 μg·mL-1) for both drugs. The spectrophotometric technique includes five different methods; Method (A) is first derivative (D1) spectrophotometry at 380.6 nm for AV and 276.2 nm for OCT, Method (B) is first derivative of ratio spectra (DR1) at 352.8 nm for AV and 312.2 nm for OCT, Method (C) is ratio difference spectrophotometry (RD) at 356 nm and nm 347.2 nm for AV and at 311.6 nm and 281 nm for OCT, Method (D) is mean centering spectrophotometry (MCR) at 356 nm for AV and 301.8 nm for OCT and method (E) is modified Vierordt's method which involves absorbance measurement at 358 nm for AV and 309.2 nm for OCT and determination of the concentration of x and y from the two simultaneous equations. The chemometric technique includes multivariate calibration methods; partial least squares (PLS) and principle component regression (PCR) using the absorption spectra. The proposed methods were applied for determination of (AV) and (OCT) simultaneously in pure form and in cosmetic formulations. These methods were validated according to ICH guidelines.
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Sherma J, Rabel F. Thin-layer chromatography in the analysis of sunscreens. J LIQ CHROMATOGR R T 2018. [DOI: 10.1080/10826076.2017.1402343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Joseph Sherma
- Department of Chemistry, Lafayette College, Easton, PA, USA
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Sobańska AW, Pyzowski J, Brzezińska E. SPE/TLC/Densitometric Quantification of Selected Synthetic Food Dyes in Liquid Foodstuffs and Pharmaceutical Preparations. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2017; 2017:9528472. [PMID: 28798884 PMCID: PMC5536146 DOI: 10.1155/2017/9528472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 06/18/2017] [Indexed: 06/07/2023]
Abstract
Selected synthetic food dyes (tartrazine, Ponceau 4R, Brilliant Blue, orange yellow, and azorubine) were isolated from liquid preparations (mouthwashes and beverages) by Solid Phase Extraction on aminopropyl-bonded silica with diluted aqueous sodium hydroxide as an eluent. The extraction step was followed by thin layer chromatography on silica gel 60 with chloroform-isopropanol-25% aq. ammonia 1 : 3 : 1 (v/v/v) as mobile phase and the densitometric quantification of dyes was achieved using quadratic calibration plots (R2 > 0.997; LOQ = 0.04-0.09 μgspot-1). The overall recoveries for all studied dyes were at the average level of over 90% and the repeatability of the proposed procedure (CV ≤ 4.1%) was sufficient to recommend it for the routine quantification of the aforementioned dyes in liquid matrices.
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Affiliation(s)
- Anna W. Sobańska
- Department of Analytical Chemistry, Medical University of Lodz, Ul. Muszynskiego 1, 90-151 Lodz, Poland
| | - Jarosław Pyzowski
- Department of Analytical Chemistry, Medical University of Lodz, Ul. Muszynskiego 1, 90-151 Lodz, Poland
| | - Elżbieta Brzezińska
- Department of Analytical Chemistry, Medical University of Lodz, Ul. Muszynskiego 1, 90-151 Lodz, Poland
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Lores M, Llompart M, Alvarez-Rivera G, Guerra E, Vila M, Celeiro M, Lamas JP, Garcia-Jares C. Positive lists of cosmetic ingredients: Analytical methodology for regulatory and safety controls - A review. Anal Chim Acta 2016; 915:1-26. [PMID: 26995636 DOI: 10.1016/j.aca.2016.02.033] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/21/2016] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
Abstract
Cosmetic products placed on the market and their ingredients, must be safe under reasonable conditions of use, in accordance to the current legislation. Therefore, regulated and allowed chemical substances must meet the regulatory criteria to be used as ingredients in cosmetics and personal care products, and adequate analytical methodology is needed to evaluate the degree of compliance. This article reviews the most recent methods (2005-2015) used for the extraction and the analytical determination of the ingredients included in the positive lists of the European Regulation of Cosmetic Products (EC 1223/2009): comprising colorants, preservatives and UV filters. It summarizes the analytical properties of the most relevant analytical methods along with the possibilities of fulfilment of the current regulatory issues. The cosmetic legislation is frequently being updated; consequently, the analytical methodology must be constantly revised and improved to meet safety requirements. The article highlights the most important advances in analytical methodology for cosmetics control, both in relation to the sample pretreatment and extraction and the different instrumental approaches developed to solve this challenge. Cosmetics are complex samples, and most of them require a sample pretreatment before analysis. In the last times, the research conducted covering this aspect, tended to the use of green extraction and microextraction techniques. Analytical methods were generally based on liquid chromatography with UV detection, and gas and liquid chromatographic techniques hyphenated with single or tandem mass spectrometry; but some interesting proposals based on electrophoresis have also been reported, together with some electroanalytical approaches. Regarding the number of ingredients considered for analytical control, single analyte methods have been proposed, although the most useful ones in the real life cosmetic analysis are the multianalyte approaches.
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Affiliation(s)
- Marta Lores
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain.
| | - Maria Llompart
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain
| | - Gerardo Alvarez-Rivera
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain
| | - Eugenia Guerra
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain
| | - Marlene Vila
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain
| | - Maria Celeiro
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain
| | - J Pablo Lamas
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain
| | - Carmen Garcia-Jares
- Laboratorio de Investigación y Desarrollo de Soluciones Analíticas (LIDSA), Departamento de Química Analitica, Nutrición y Bromatología, Facultad de Quimica, Universidade de Santiago de Compostela, Campus VIDA. Santiago de Compostela, E-15782, Spain
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Dołowy M, Pyka A. Lipophilicity Study of Salicylic and Acetylsalicylic Acids Using Both Experimental and Calculations Methods. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2014.913527] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Małgorzata Dołowy
- a Department of Analytical Chemistry, Faculty of Pharmacy , Medical University of Silesia in Katowice , Sosnowiec , Poland
| | - Alina Pyka
- a Department of Analytical Chemistry, Faculty of Pharmacy , Medical University of Silesia in Katowice , Sosnowiec , Poland
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Abstract
AbstractThe most important advances in planar chromatography published between November 1, 2011 and November 1, 2013 are reviewed in this paper. Included are an introduction to the current status of the field; student experiments, books, and reviews; theory and fundamental studies; apparatus and techniques for sample preparation and TLC separations (sample application and plate development with the mobile phase); detection and identification of separated zones (chemical and biological detection, TLC/mass spectrometry, and TLC coupled with other spectrometric methods); techniques and instruments for quantitative analysis; preparative layer chromatography; and thin layer radiochromatography. Numerous applications to a great number of compound types and sample matrices are presented in all sections of the review.
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Quantification of sunscreen 2-phenylbenzimidazole-5-sulfonic acid in cosmetic products and water samples by HPTLC/densitometry with fluorescent detection. OPEN CHEM 2013. [DOI: 10.2478/s11532-012-0151-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThe water-soluble sunscreen 2-phenylbenzimidazole-5-sulfonic acid (PBS) was quantified in a sun-care product and water samples by thin layer chromatography followed by densitometric scanning in fluorescence mode (cut-off filter 370 nm, wavelength of excitation — 300 nm). Normal phase TLC was performed on silica gel 60 as stationary phase. Mobile phase used was ethyl acetate-ethanol-water 70:35:30 (v/v/v). The limit of detection (LOD) was 0.0004 μg spot-1, and the limit of quantification (LOQ) was — 0.001 µg spot−1 without any sample pre-concentration.
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