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You searched for: Author maria Remove constraint Author: maria Journal name Food chemistry Remove constraint Journal name: Food chemistry Subject term acetonitrile Remove constraint Subject term: acetonitrile
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1. Optimisation of a sample preparation method for the determination of fumonisin B1 in rice

Author:
Maria Isabel Rodrigues; Célia Maria de Sylos,   et al.   ; Mateus Henrique Petrarca; Elizeu Antonio Rossi;     Show all 4 Authors
Source:
Food chemistry 2014 v.158 pp. 270-277
ISSN:
0308-8146
Subject:
acetic acid; acetonitrile; aqueous solutions; cost effectiveness; derivatization; detection limit; diatomaceous earth; experimental design; fumonisin B1; rice; sodium chloride; sodium sulfate; Brazil
Abstract:
... A simple, rapid and cost-effective sample preparation method for the determination of fumonisin B1 in rice was optimised using a strategy of sequential experimental designs. Initially, a Plackett–Burman design was applied to select the statistically significant variables for the determination of fumonisin B1, and then, a central composite rotatable design was used to define the optimal conditions ...
DOI:
10.1016/j.foodchem.2014.02.126

2. Quantitative analysis of pungent and anti-inflammatory phenolic compounds in olive oil by capillary electrophoresis

Author:
Maria Halabalaki,   et al.   ; Isabella Vulcano; Leandros Skaltsounis; Markus Ganzera;     Show all 4 Authors
Source:
Food chemistry 2015 v.169 pp. 381-386
ISSN:
0308-8146
Subject:
acetonitrile; borax; buffers; capillary electrophoresis; high performance liquid chromatography; oleocanthal; olive oil; pH; quantitative analysis; secoiridoids; solvents
Abstract:
... The first CE procedure for the quantitative determination of pharmacologically relevant secoiridoids in olive oil, oleocanthal and oleacein, is described. Together with their precursors tyrosol and hydroxytyrosol they could be baseline separated in less than 15min using a borax buffer with pH 9.5, at 25kV and 30°C. Method validation confirmed that the procedure is selective, accurate (recovery rat ...
DOI:
10.1016/j.foodchem.2014.08.007

3. Fast analysis of curcuminoids from turmeric (Curcuma longa L.) by high-performance liquid chromatography using a fused-core column

Author:
Maria Angela de Almeida Meireles,   et al.   ; J. Felipe Osorio-Tobón; Pedro I.N. Carvalho; Gerardo Fernández Barbero; Gislaine Chrystina Nogueira; Mauricio Ariel Rostagno;     Show all 6 Authors
Source:
Food chemistry 2016 v.200 pp. 167-174
ISSN:
0308-8146
Subject:
Curcuma longa; acetonitrile; curcumin; detection limit; ethanol; high performance liquid chromatography; methanol; rhizomes; solvents; temperature; turmeric
Abstract:
... The recent development of fused-core technology in HPLC columns is enabling faster and highly efficient separations. This technology was evaluated for the development of a fast method for the analysis of main curcuminoids (curcumin, demethoxycurcumin and bisdemethoxycurcumin) present in extracts of turmeric (Curcuma longa L.). A step-by-step strategy was used to optimize temperature (40–55°C), flo ...
DOI:
10.1016/j.foodchem.2016.01.021

4. In house validation from direct determination of 5-hydroxymethyl-2-furfural (HMF) in Brazilian corn and cane syrups samples by HPLC–UV

Author:
Maria L. Felsner,   et al.   ; Jucimara K. de Andrade; Emy Komatsu; Hélène Perreault; Yohandra R. Torres; Marcos R. da Rosa;     Show all 6 Authors
Source:
Food chemistry 2016 v.190 pp. 481-486
ISSN:
0308-8146
Subject:
acetonitrile; cane syrup; corn; corn syrup; food safety; formic acid; high performance liquid chromatography; hydroxymethylfurfural
Abstract:
... In this work the development and in house validation of the HMF direct determination in corn and cane syrups by HPLC–UV was carried out for the first time. The separation was done with isocratic elution of a mobile phase comprising water (with 0.5% formic acid) and acetonitrile (90:10, v/v) on Phenomenex C18 column (5.0μm, 4.6×150mm), at 30°C, flow rate of 0.8mLmin−1 and detection at 285nm. The va ...
DOI:
10.1016/j.foodchem.2015.05.131

5. A stepwise approach for the detection of carminic acid in saffron with regard to religious food certification

Author:
Maria Z. Tsimidou,   et al.   ; Stella A. Ordoudi; Chrysoula Staikidou; Anastasia Kyriakoudi;     Show all 4 Authors
Source:
Food chemistry 2018 v.267 pp. 410-419
ISSN:
0308-8146
Subject:
Fourier transform infrared spectroscopy; acetonitrile; adulterated products; certification; chemometrics; colorimetry; grinding; halal foods; insects; natural dyes; saffron; screening; solvents; trade; ultraviolet-visible spectroscopy
Abstract:
... The stepwise approach takes advantage of simple, versatile, low-cost screening tools that can be applied to several posts of the saffron trade chain to specifically detect adulteration with carminic acid (CA). This natural dye is of insect origin and should not be present in Kosher and Halal foods such as saffron. For gross adulteration levels (>25.0%, w/w) reaction with diphenylamine-sulfuric aci ...
DOI:
10.1016/j.foodchem.2017.04.096

6. Quinolones and tetracyclines in aquaculture fish by a simple and rapid LC-MS/MS method

Author:
Maria Beatriz A. Gloria,   et al.   ; Letícia Rocha Guidi; Flávio Alves Santos; Ana Cláudia S.R. Ribeiro; Christian Fernandes; Luiza H.M. Silva;     Show all 6 Authors
Source:
Food chemistry 2018 v.245 pp. 1232-1238
ISSN:
0308-8146
Subject:
Oncorhynchus mykiss; Oreochromis niloticus; acetonitrile; enrofloxacin; fish; food safety; liquid chromatography; maximum residue limits; multiresidue analysis; tandem mass spectrometry; tetracyclines; trichloroacetic acid
Abstract:
... The determination of antimicrobials in aquaculture fish is important to ensure food safety. Therefore, simple and fast multiresidue methods are needed. A liquid chromatography tandem mass spectrometry method was developed and validated for the quantification of 14 antimicrobials (quinolones and tetracyclines) in fish. Antimicrobials were extracted with trichloroacetic acid and chromatographic sepa ...
DOI:
10.1016/j.foodchem.2017.11.094

7. The validated and sensitive HPLC-DAD method for determination of patulin in strawberries

Author:
Magdalena Maria Staniszewska,   et al.   ; Ilona Sadok; Agnieszka Szmagara;     Show all 3 Authors
Source:
Food chemistry 2018 v.245 pp. 364-370
ISSN:
0308-8146
Subject:
acetic acid; acetonitrile; carbon; high performance liquid chromatography; markets; patulin; salts; solid phase extraction; strawberries
Abstract:
... This work outlines HPLC coupled with DAD detection for accurate quantification of patulin (mycotoxin) in strawberries. The optimized extraction of fruit samples through the modified QuEChERS technique in acetonitrile acidified with acetic acid (1%, v/v) and citrate-buffered salts followed by dispersive solid phase extraction using a primary secondary amine and graphitized carbon is described. The ...
DOI:
10.1016/j.foodchem.2017.10.093

8. HPLC-potentiometric method for determination of biogenic amines in alcoholic beverages: A reliable approach for food quality control

Author:
Maria C.B.S.M. Montenegro,   et al.   ; Renato L. Gil; Célia G. Amorim; Alberto N. Araújo;     Show all 4 Authors
Source:
Food chemistry 2022 v.372 pp. 131288
ISSN:
0308-8146
Subject:
acetic acid; acetonitrile; beers; cadaverine; electrodes; food chemistry; food quality; ion pair chromatography; methylamine; molecular weight; quality control; red wines; regression analysis; spermine; tyramine; white wines
Abstract:
... Determination of ten biogenic amines in alcoholic beverages by HPLC coupled to a potentiometric detector for food quality control is herein presented. Biogenic amines were separated by ion-pair chromatography on a C18 column using a gradient mobile phase of acetic acid, acetonitrile, and butane-sulfonic acid. Detection was accomplished by a miniaturized amine-selective electrode. The method was va ...
DOI:
10.1016/j.foodchem.2021.131288

9. Novel approach for purification of major betalains using flash chromatography and comparison of radical scavenging and antioxidant activities

Author:
Maria J. Frutos,   et al.   ; Ganwarige Sumali N. Fernando; Natalia N. Sergeeva; Lisa J. Marshall; Christine Boesch;     Show all 5 Authors
Source:
Food chemistry 2022 v.385 pp. 132632
ISSN:
0308-8146
Subject:
acetonitrile; antioxidants; betalains; food chemistry; formic acid; raw materials; reversed-phase high performance liquid chromatography
Abstract:
... The present study focused on the development of a new purification protocol suitable for betanin and other major betalains, vulgaxanthin I, indicaxanthin and neobetanin, using flash chromatography which is a convenient and fast method to isolate unstable materials. Following preliminary tests, a gradient procedure using 0–60% acetonitrile, with 0.1% (v/v) formic acid as mobile phase, was selected ...
DOI:
10.1016/j.foodchem.2022.132632