scholarly journals Solid Phase Extraction of Trace Amounts of Praseodymium Using Transcarpathian Clinoptilolite

2019 ◽  
Vol 3 (1) ◽  
pp. 27 ◽  
Author(s):  
Olha Stashkiv ◽  
Volodymyr Vasylechko ◽  
Galyna Gryshchouk ◽  
Ihor Patsay
Keyword(s):  
Detection Limit ◽  
Solid Phase Extraction ◽  
Sorption Capacity ◽  
Flow Rate ◽  
Salt Solution ◽  
Ph Value ◽  
Solid Phase ◽  
Phase Extraction ◽  
Optimal Conditions

Sorptive properties of the Transcarpathian clinoptilolite towards Pr(III) were studied under dynamic conditions. The sorption capacity of clinoptilolite under optimal conditions (sorbent grain diameter of 0.20–0.31 mm; pH 9.0, temperature of preliminary precalcination of 350 °C, and flow rate of the Pr(III) salt solution with the concentration of 1.0 μg·mL−1 through the sorbent of 5 mL·min−1) was equal to 47.5 mg·g−1. The best desorbent of Pr from the clinoptilolite was the 1 M solution of KCl acidified with HCl to a pH value of 3.0. The method of Pr(III) trace amounts preconcentration in a solid phase extraction mode with further determination of this REE via spectrophotometric technique was developed. The linearity of the proposed method was evaluated in the range of 2–100 ng·mL−1 with detection limit of 0.7 ng·mL−1.

scholarly journals Preconcentration of Copper with Solid Phase Extraction and its Determination by Flame Atomic Absorption Spectrometry

2008 ◽  
Vol 5 (4) ◽  
pp. 878-883 ◽  
Author(s):  
Ayob Parchehbaf Jadid ◽  
Habibollah Eskandari
Keyword(s):  
Detection Limit ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Copper Ions ◽  
Absorption Spectrometry ◽  
Phase Extraction ◽  
Flame Atomic Absorption ◽  
Low Levels ◽  
Determination Of Copper

A new method for the solid phase extraction (SPE) and determination of copper ions at low levels is presented. Extraction percent and the effects of some factors were evaluated. The detection limit was in the range of 2.26 µg·L-1. This procedure has been successfully applied to determination of copper in water samples.

scholarly journals Determination of Low Levels of Lead in Beer Using Solid-Phase Extraction and Detection by Flame Atomic Absorption Spectrometry

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Vanessa N. Alves ◽  
Simone S. O. Borges ◽  
Waldomiro B. Neto ◽  
Nívia M. M. Coelho
Keyword(s):  
Solid Phase Extraction ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flow Rate ◽  
Flame Atomic Absorption Spectrometry ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Phase Extraction ◽  
Flame Atomic Absorption

In this study, a method for the determination of low concentrations of lead in beer samples using solid-phase extraction with a flow injection analysis system and detection by flame atomic absorption spectrometry (FAAS) was developed.Moringa oleiferaseeds were used as a biosorbent material. Chemical and flow variables of the online preconcentration system, such as sample pH, preconcentration flow rate, eluent flow rate, eluent concentration, particle size, and sorbent mass, were studied. The optimum extraction conditions were obtained using a sample pH of 6.0, sample flow rate of 6.0 mL min−1, 63.0 mg of sorbent mass, and 2.0 mol L−1HNO3at a flow rate of 2.0 mL min−1as the eluent. With the optimized conditions, the preconcentration factor, precision, detection limit, consumption index, and sample throughput were estimated as 93, 0.3% (10.0 μg L−1,n=7), 7.5 μg L−1, 0.11 mL, and 23 samples per hour, respectively. The method developed was successfully applied to beer samples and recovery tests, with recovery ranging from 80% to 100%.

scholarly journals Cadmium in Water Samples determined by Atomic Absorption Spectrometry after Solid Phase Extraction using DOWEX 50WX2 resin

2021 ◽  
Vol 6 (1) ◽  
pp. 14-19
Author(s):  
Yuniar Yuniar ◽  
◽  
Siti Nuraini
Keyword(s):  
Detection Limit ◽  
Solid Phase Extraction ◽  
Atomic Absorption Spectrometry ◽  
Flow Rate ◽  
Water Samples ◽  
Solid Phase ◽  
Tap Water ◽  
Absorption Spectrometry ◽  
Phase Extraction ◽  
Optimum Conditions

The Pre-concentration of Cd(II) in water samples was carried out by using column solid phase extraction DOWEX 50WX2 prior to flame atomic absorption spectrometry analyzed. The analytical parameters consist of pH, flow rate, volume of eluent and volume of sample were determined.The optimum conditions were obtained pH was 5, sample flow rate was 1 mL min−1, volume of eluent nitric acid 1N was 10 mL and sample volume was 50 mL. The optimum conditions obtained were used to determine the detection limit and the accuracy of the method using tap water samples. Determination of detection limit used tap water which contain Cd 0.001 mg L-1 and the accuracy (recovery,%R) with concentration of Cd 0.01 mg L-1. The detection limit was found 0.2697±0.0899 µg L− 1 (n=7) and accuracy (n=7) was 93±6%. The result showed the accuracy still meets the acceptance criteria for accuracy (70%-125%) and the RSD 6% is smaller than the Horwitz value of 20.8%. Based on the accuracy (R%) and % RSD values obtained, it can be concluded that this method provides effective results for pre-concentration to increase the detection limit of Cd (II)in clean water using SSA-flame.

scholarly journals Solid-Phase Extraction for Photometric Determination of Rosmarinic Acid in Lemon Balm (Melissa Officinalis) Extracts

2012 ◽  
Vol 11 (1) ◽  
pp. 62-72 ◽  
Author(s):  
Miroslav Ondrejovič ◽  
Tibor Maliar ◽  
Hana Benkovičová ◽  
Jana Kubincová
Keyword(s):  
Solid Phase Extraction ◽  
Flow Rate ◽  
Rosmarinic Acid ◽  
Mobile Phase ◽  
Solid Phase ◽  
Photometric Determination ◽  
Phase Extraction ◽  
Melissa Officinalis ◽  
Lemon Balm

Solid-Phase Extraction for Photometric Determination of Rosmarinic Acid in Lemon Balm (Melissa Officinalis) Extracts The aim of this study was evaluation of the solid-phase extraction for elimination of interference compounds from lemon balm extracts aimed for photometric determination of rosmarinic acid. In experiments, evaluated conditions were as follows: composition and volume of mobile phase, ratio between volume of sample and mass of stationary phase and flow rate of mobile phase during separation. The results indicated that interfered compounds were eliminated. The lemon balm extracts should be pretreated by adsorption on normal stationary phase (silica gel) in ratio sample volume to silica gel weight 1:1 (v/w) elution by mobile phase - diethyl ether: acetic acid (9:1; v/v) - volume - 40 times of crude extract volume - with flow rate 5 ml/min. After selection of SPE conditions, the method was validated with comparison to HPLC analysis. The results suggest that this method may be useable for determination of rosmarinic acid by photometric measurement based on the complexation of Fe2+ ions with rosmarinic acid.

scholarly journals Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
José A. Rodríguez ◽  
Karen A. Escamilla-Lara ◽  
Alfredo Guevara-Lara ◽  
Jose M. Miranda ◽  
Ma. Elena Páez-Hernández
Keyword(s):  
Activated Carbon ◽  
Solid Phase Extraction ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Optimal Conditions ◽  
Magnetic Solid ◽  
Nonalcoholic Beverages

A method is presented for magnetic solid phase extraction of tartrazine from nonalcoholic beverages. The method involves the extraction and clean-up by activated carbon covered with magnetite dispersed in the sample, followed by the magnetic isolation and desorption of the analyte by basified methanol. The tartrazine eluted from the magnetic support was determined by spectrophotometry. Under optimal conditions, the linear range of the calibration curve ranges from 3 to 30 mg L−1, with a limit of detection of 1 mg L−1. The method was validated by comparing the results with those obtained by HPLC. A precision of<5.0% was obtained in all cases and no significant differences were observed(P<0.05).

Development of polyacrylamide chromium oxide as a new sorbent for solid phase extraction of As(iii) from food and environmental water samples

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7311-7323 ◽  
Author(s):  
Nafisur Rahman ◽  
Uzma Haseen
Keyword(s):  
Detection Limit ◽  
Solid Phase Extraction ◽  
Chromium Oxide ◽  
Water Samples ◽  
Solid Phase ◽  
Environmental Water ◽  
Trace Determination ◽  
Phase Extraction ◽  
Efficient Adsorbent

PACO was developed as an efficient adsorbent for preconcentration and trace determination of As(iii) with a detection limit of 0.45 μg L−1.

Simultaneous Preconcentration and Determination of Brilliant Blue and Sunset Yellow in Foodstuffs by Solid-Phase Extraction Combined UV-Vis Spectrophotometry

2018 ◽  
Vol 101 (6) ◽  
pp. 1850-1856 ◽  
Author(s):  
Abdullah Taner Bişgin
Keyword(s):  
Solid Phase Extraction ◽  
Flow Rate ◽  
Solid Phase ◽  
Ethanol Solution ◽  
Water Soluble ◽  
Brilliant Blue ◽  
Phase Extraction ◽  
Sunset Yellow ◽  
Food Dyes

Abstract Background: Brilliant Blue and Sunset Yellow, two highly water-soluble synthetic food dyes, are the most popular food dyes used and consumed. Although they are not highly toxic, some health problems can be observed when excessive amounts of food products containing these dyes are consumed. Objectives: The aim of the study was to develop a simultaneous UV-Vis combined solid-phase extraction method, based on the adsorption onto Amberlite XAD-8 resin, for determination of Brilliant Blue and Sunset Yellow dyes. Methods: Sample solution was poured into the reservoir of the column and permitted to gravitationally pass through the column at 2 mL/min flow rate. Adsorbed dyes were eluted to 5 mL of final volume with 1 mol/L HNO3 in ethanol solution by applying a 2 mL/min flow rate. Dye concentrations of the solution were determined at 483 and 630 nm for Sunset Yellow and Brilliant Blue, respectively. Results: The detection limits of the method for Brilliant Blue and Sunset Yellow were determined as 0.13 and 0.66 ng/mL, respectively. Preconcentration factor was 80. Brilliant Blue contents of real food samples were found to be between 11 and 240 μg/g. Sunset Yellow concentrations of foodstuffs were determined to be between 19 and 331 μg/g. Conclusions: Economical, effective, and simple simultaneous determination of Brilliant Blue and Sunset Yellow was achieved by using a solid-phase extraction combined UV-Vis spectrometry method. Highlights: The method is applicable and suitable for routine analysis in quality control laboratories without the need for expert personnel and high operational costs because the instrumentation is simple and inexpensive.

scholarly journals Determination of lead in solution by solid phase extraction, elution, and spectrophotometric detection using 4-(2-pyridylazo)-resorcinol

2013 ◽  
Vol 11 (5) ◽  
pp. 672-678 ◽  
Author(s):  
Ismail Rahman ◽  
Yoshiaki Furusho ◽  
Zinnat Begum ◽  
Rika Sato ◽  
Hiroshi Okumura ◽  
...  
Keyword(s):  
Detection Limit ◽  
Molecular Recognition ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Linear Range ◽  
Phase Extraction ◽  
Spectrophotometric Detection ◽  
Molecular Recognition Technology ◽  
Complex Ion

AbstractLead (+2) was selectively adsorbed on a solid phase extraction (SPE) gel (molecular recognition technology, MRT), quantitatively extracted, and spectrophotometrically determined as the Pb(II)-PAR (4-(2-pyridylazo)-resorcinol) complex. The linear range was 0.01 to 0.75 mg L−1 and the detection limit was 6.4 µg L−1. The MRT-SPE allows selective Pb(II) extraction from complex ion-rich matrices, which is difficult with other techniques. Interference from common matrix ions such as Fe2+, Ni2+, Cu2+ or Co2+ is minimized.

scholarly journals Chromium-based metal organic framework for pipette tip micro-solid phase extraction: an effective approach for determination of methyl and propyl parabens in wastewater and shampoo samples

BMC Chemistry ◽  
2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Massoud Kaykhaii ◽  
Sayyed Hossein Hashemi ◽  
Fariba Andarz ◽  
Amin Piri ◽  
Ghasem Sargazi ◽  
...  
Keyword(s):  
Detection Limit ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Metal Organic Framework ◽  
Phase Extraction ◽  
Propyl Paraben ◽  
Metal Organic ◽  
Pipette Tip ◽  
Organic Framework

Abstract Background A chromium-based metal organic framework was synthesized and employed as an efficient sorbent for pipette tip micro-solid phase extraction and preconcentration of parabens from wastewater and shampoo samples up to sub-ppb level before their spectrophotometric analysis. Results Factors affecting preconcentration including volume and type of solvent, amount of sorbent, number of extraction, and volume and pH of samples were optimized employing one-variable-at-a-time and response surface methodology. Obtained analytical characteristics of the method proves its usefulness for analysis of real samples. Linear range of the method for parabens was 1.0–200.0 μg/L. Detection limit of the protocol was 0.24 µg/L for propyl paraben and 0.25 µg/L for methyl paraben. Reproducibility of the protocol defined as % RSD was better than 5.78%. Synthesized adsorbent can be re-used for at least 20 extractions. Conclusion The method showed a good detection limit and precision for determination of methyl- and propyl-paraben in wastewater and shampoo samples.

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