TXRF intensity dependence on position of dried residue on sample carrier and TXRF determination of halogen in liquid samples

2016 ◽  
Vol 45 (4) ◽  
pp. 197-201 ◽  
Author(s):  
Yuri Tabuchi ◽  
Kouichi Tsuji
Keyword(s):  
Intensity Dependence ◽  
Liquid Samples ◽  
Sample Carrier

The Use of Reverse Mirage Spectroscopy to Determine the Absorption Coefficient of Liquid Methanol at CO2 Laser Wavelengths

1989 ◽  
Vol 43 (1) ◽  
pp. 148-153 ◽  
Author(s):  
Dane Bićanić ◽  
Siegfried Krüger ◽  
Paul Torfs ◽  
Bruno Bein ◽  
Frans Harren
Keyword(s):  
Absorption Coefficient ◽  
Co2 Laser ◽  
Probe Beam ◽  
Laser Emission ◽  
Wavelength Region ◽  
Experimental Setup ◽  
Absorption Coefficients ◽  
Experimental Conditions ◽  
Liquid Samples

An experimental setup for performance of reverse mirage spectroscopy at CO2 laser wavelengths on liquid samples having high values of absorption coefficients is described. One and the same liquid is used as both the absorbing and deflecting medium. The Rosencwaig-Gersho theory has been applied, and the choice of experimental conditions that would enable determination of absorption coefficient β from the magnitude of photothermal signals measured at two different probe beam distances (probing locations) is discussed. The usefulness of this technique (essentially not inhibited by the requirements imposed on the sample's thickness) is tested on methanol having absorption coefficients β close to 300 cm−1 in the wavelength region covered by CO2 laser emission.

Sequential separation of Fe and Sr from liquid samples by using Sr resin and rapid determination of 55Fe and 89,90Sr

2013 ◽  
Vol 81 ◽  
pp. 42-48 ◽  
Author(s):  
Željko Grahek ◽  
Ivana Milanović ◽  
Marijana Nodilo ◽  
Martina Rožmarić
Keyword(s):  
Rapid Determination ◽  
Sr Resin ◽  
Liquid Samples ◽  
Sequential Separation

scholarly journals Applications of Fabric Phase Sorptive Extraction to the Determination of Micropollutants in Liquid Samples

Separations ◽  
2018 ◽  
Vol 5 (3) ◽  
pp. 35 ◽  
Author(s):  
Sarah Montesdeoca-Esponda ◽  
Rayco Guedes-Alonso ◽  
Sergio Santana-Viera ◽  
Zoraida Sosa-Ferrera ◽  
José Santana-Rodríguez
Keyword(s):  
Sorptive Extraction ◽  
Liquid Samples

A procedure for the determination of dichloromethane and tetrachloroethene in water using pervaporation and gas chromatography

2011 ◽  
Vol 65 (5) ◽  
Author(s):  
Irena Rutkiewicz ◽  
Wojciech Kujawski ◽  
Jacek Namieśnik
Keyword(s):  
Gas Chromatography ◽  
International Agency ◽  
Gas Chromatograph ◽  
Human Carcinogen ◽  
Enrichment Technique ◽  
Liquid Samples ◽  
Basic Parameters ◽  
Direct Aqueous Injection

AbstractIn the present study, pervaporation was applied to the determination of tetrachloroethene (PCE) and dichloromethane (DCM) in liquid samples. PCE is the most commonly used solvent in drycleaning processes. PCE belongs to group 2A of carcinogens (probably carcinogenic to humans) according to the classification of the International Agency for Research on Cancer (IARC). DCM is also widely used as an industrial solvent for the purification and isolation of intermediates or products. DCM is classified as a “possible” human carcinogen by the IARC. The aim of this study was to evaluate a new procedure for the determination of DCM and PCE in liquid samples based on the pervaporative removal of DCM and PCE from liquid samples as an analyte isolation/enrichment technique, followed by a direct aqueous injection of the extracts onto the column of a gas chromatograph equipped with an electron capture detector (DAI-GC-ECD). The basic parameters of the new PV-DAI-GC-ECD procedure were evaluated.

Analytical methodologies for the determination of nitroimidazole residues in biological and environmental liquid samples: A review

2010 ◽  
Vol 665 (2) ◽  
pp. 113-122 ◽  
Author(s):  
Cristina Mahugo-Santana ◽  
Zoraida Sosa-Ferrera ◽  
Ma Esther Torres-Padrón ◽  
José Juan Santana-Rodríguez
Keyword(s):  
Liquid Samples

scholarly journals The Influence of Sample pH on the Determination of Selected Carboxylic Acids by Isocratic Ion Chromatography

2021 ◽  
Vol 15 (3) ◽  
pp. 319-323
Author(s):  
Paulina Pecyna-Utylska ◽  
◽  
Tomasz Konieczny ◽  
Rajmund Michalski ◽  
◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Ion Chromatography ◽  
Coal Combustion ◽  
Medium Density ◽  
Chromatography Method ◽  
Ph Changes ◽  
Liquid Samples ◽  
Suppressed Conductivity Detection ◽  
By Products

Validated isocratic ion chromatography method with suppressed conductivity detection has been developed for the simultaneously determination of common inorganic anions (F-, Cl-, NO3-, PO43-, SO42-), as well as formate and acetate. Liquid samples originate from absorption of gaseous by-products from coal combustion with and without the addition of medium-density fireboards. The influence of sample pH changes on carboxylic acids determination has been tested.

Comparison of density determination of liquid samples by density meters

Metrologia ◽  
2016 ◽  
Vol 53 (1A) ◽  
pp. 07007-07007
Author(s):  
C Vámossy ◽  
S Davidson ◽  
Z Zelenka
Keyword(s):  
Density Determination ◽  
Liquid Samples

Simultaneous Spectrophotometric Determination of Brilliant Blue and Tartrazine in Diverse Sample Matrices after Solid Phase Extraction

2020 ◽  
Vol 103 (6) ◽  
pp. 1478-1485
Author(s):  
Abdullah Taner Bişgin
Keyword(s):  
Spectrophotometric Determination ◽  
Solid Phase ◽  
Brilliant Blue ◽  
Liquid Samples ◽  
Quantitative Extraction ◽  
Relative Standard ◽  
Separation And Preconcentration ◽  
Preconcentration Factor ◽  
Experienced Operator

Abstract Background Brilliant blue (BB) and tartrazine (TZ) are manufactured from petroleum and its products. These are the most popular consumed food dyes and are widely used in foodstuffs. Therefore, overuse of these dyes in foodstuffs and consumption of excessive amounts of these dyes can lead to health problems in humans. Objective The aim of this study was to develop a simple separation and preconcentration method for simultaneous spectrophotometric determination of BB and TZ dyes. Methods A column solid-phase separation extraction method combined with UV-Vis spectrophotometry was preferred and developed for single and simultaneous determination of BB and TZ dyes. Results The preconcentration factor was obtained as 80. Relative standard deviations were below than 4%. Detection limits of the method were determined as 0.29 and 1.21 µg/L for BB and TZ, respectively. Recovery values were obtained between 95–99% and 96–100% for BB and TZ, respectively. 10.9–235.7 µg/g and 1.7–8.0 µg/mL of BB contents of real samples were determined for solid and liquid samples, respectively. TZ concentrations of solid and liquid samples were ranged between 18.7–220.7 µg/g and 5.9–7.5 µg/mL, respectively. Conclusions Quantitative extraction results and satisfactory recovery values showed that method was successful and applicable for determination of BB and TZ concentrations in real pharmaceutical, industrial, and foodstuff samples. Highlights The method has exhibited a high preconcentration factor and effective separation against to matrix ions. The method did not need an experienced operator with high operation experience. Elution solvent can be chosen according to the availability of the chemicals in the laboratory and cheapness of the chemicals.

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