Development of a simple and efficient pretreatment technique named pH-dependent continuous homogenous liquid–liquid extraction

2016 ◽  
Vol 8 (28) ◽  
pp. 5676-5683 ◽  
Author(s):  
Mir Ali Farajzadeh ◽  
Ali Mohebbi ◽  
Behruz Feriduni
Keyword(s):  
Fruit Juice ◽  
Sample Pretreatment ◽  
Liquid Extraction ◽  
Flame Ionization Detection ◽  
Vegetable Samples ◽  
Flame Ionization ◽  
Liquid Liquid Extraction ◽  
Ph Dependent ◽  
Extraction Preconcentration

In this study, a simple and rapid sample pretreatment technique named pH-dependent continuous homogenous liquid–liquid extraction followed by gas chromatography-flame ionization detection has been developed for the extraction, preconcentration, and determination of four pesticides including diazinon, oxadiazon, bromopropylate, and fenazaquin in fruit juice and vegetable samples.

Development of a new version of homogenous liquid–liquid extraction based on an acid–base reaction: application for extraction and preconcentration of aryloxyphenoxy-propionate pesticides from fruit juice and vegetable samples

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 14927-14936 ◽  
Author(s):  
Mir Ali Farajzadeh ◽  
Behruz Feriduni ◽  
Mohammad Reza Afshar Mogaddam
Keyword(s):  
Fruit Juice ◽  
Liquid Extraction ◽  
Acid Base ◽  
Vegetable Samples ◽  
Liquid Liquid Extraction

In this paper, a new version of HLLE based on an acid–base reaction combined with DLLME followed by GC-FID has been developed for the extraction and determination of aryloxyphenoxy-propionate pesticides in fruit juice and vegetable samples.

scholarly journals A Sensitive and Efficient Method for Determination of Capecitabine and Its Five Metabolites in Human Plasma Based on One-Step Liquid-Liquid Extraction

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Zhipeng Wang ◽  
Xinxing Li ◽  
Yang Yang ◽  
Feng Zhang ◽  
Mingming Li ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Human Plasma ◽  
High Performance ◽  
Sample Pretreatment ◽  
Liquid Extraction ◽  
Cancer Drug ◽  
Clinical Samples ◽  
Liquid Liquid Extraction ◽  
One Step

Colorectal cancer is the most common critical disease both in the developed and developing countries. Capecitabine, which has served in clinical practice at least for 10 years, is a first-line antidigestive tract cancer drug for its better efficacy, patient compliance, and lower side effects. An ultra-high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) method has been developed and completely validated for simultaneous determination of capecitabine and its five metabolites in human plasma from colorectal cancer patients after administration of capecitabine tablet. One-step liquid-liquid extraction was successfully applied using ethyl acetate and isopropanol (19 : 1, V : V) for sample pretreatment. Chromatographic separation was achieved within 5 min based on an Atlantis T3-C18 column (3.0 µm, 2.1 × 100 mm) with gradient elution using mobile phases consisting of 0.0075% formic acid in water (pH 4) and in acetonitrile, and the flow rate was 0.3 mL/min. Linear range was approximately 20.0–5000.0 ng/mL for all analytes. Linear correlation coefficients were >0.99 for all regression curves. The intraday and interday accuracy and precision of the method were within ±15.0% and less than 15.0%, respectively. The mean recovery and matrix effect as well as stability of all the analytes ranged from 59.27% to 90.15% and from 74.84% to 114.48% as well as within ±15.0%. This simple, rapid, and sensitive method was successfully applied in 42 sparse clinical samples to verify its practicability.

An elevated temperature-dispersive liquid–liquid microextraction method combined with GC-flame ionization detection as a sensitive method for determining phthalate esters

2015 ◽  
Vol 7 (10) ◽  
pp. 4269-4277 ◽  
Author(s):  
Mir Ali Farajzadeh ◽  
Samaneh Rezaee Aghdam ◽  
Mohammad Reza Afshar Mogaddam ◽  
Houshang Ghorbanpour
Keyword(s):  
Phthalate Esters ◽  
Flame Ionization Detection ◽  
Aqueous Samples ◽  
Flame Ionization ◽  
Dispersive Liquid Liquid Microextraction ◽  
Trace Concentrations ◽  
Extraction Preconcentration ◽  
Liquid Microextraction ◽  
Sensitive Method

Here we report a sensitive method for the extraction, preconcentration and determination of trace concentrations of phthalate esters in aqueous samples.

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