scholarly journals Study on GC/MS (SIM) for Determination of Carbamate and Organonitrogen Pesticides in Foods with Simple Clean-up by SPE Method

1999 ◽  
Vol 40 (5) ◽  
pp. 382-390_1 ◽  
Author(s):  
Masaru KAWASAKI ◽  
Tsuyoshi INOUE ◽  
Katsuharu FUKUHARA ◽  
Sadao UCHIYAMA
Keyword(s):  
Organonitrogen Pesticides ◽  
Spe Method

scholarly journals Determination of dimethoate, 2,4-dichlorophenoxy acetic acid, mecoprop and linuron pesticides in environmental waters in Republic of Macedonia by high performance liquid chromatography

2008 ◽  
Vol 27 (1) ◽  
pp. 25 ◽  
Author(s):  
Aleksandra Nestorovska-Krsteska ◽  
Meri Mirčeska ◽  
Jean-Jacques Aaron ◽  
Zoran Zdravkovski
Keyword(s):  
Acetic Acid ◽  
Solid Phase Extraction ◽  
High Performance ◽  
Solid Phase ◽  
Sampling Period ◽  
Phase Extraction ◽  
Environmental Waters ◽  
Spe Method ◽  
Dichlorophenoxy Acetic Acid

An HPLC-UVDAD method for determination of dimethoate, 2,4-dichlorophenoxy acetic acid (2,4-D), mecoprop (MCPP) and linuron in environmental waters was developed. The water samples were concentrated and extracted by a solid phase extraction (SPE) method on Bond Elut PPL cartridges. After extraction the investigated compounds were separated on Stability RP Pesticides chromatographic column using mobile phase composed of acetonitrile- water-acetic acid in volume fractions of 39:59:2 and flow rate of 0.7 mL/min. Ultraviolet absorption detection was carried out for dimethoate, 2,4-D and MCPP at 229 nm, and for linuron at 249 nm. Recoveries made from 500 mL of drinking waters using solid phase extraction ranged between 64.3–92.1 %. The method was applied to environmental waters in Macedonia that receive runoffs from agriculture lands. The levels of pesticides under study ranged between 0.31 μg/L and 7.05 μg/L, depending on the compound and sampling period.

scholarly journals Development of a Solid-Phase Extraction Method for Determination of Pheophorbide a and Pyropheophorbide a in Health Foods by Liquid Chromatography

2004 ◽  
Vol 87 (4) ◽  
pp. 937-942 ◽  
Author(s):  
Harumi Oshima ◽  
Eiji Ueno ◽  
Isao Saito ◽  
Hiroshi Matsumoto
Keyword(s):  
Liquid Chromatography ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Reversed Phase ◽  
Official Method ◽  
Phase Extraction ◽  
Pheophorbide A ◽  
Significant Difference ◽  
Spe Method

Abstract A simple solid-phase extraction (SPE) method was developed for the liquid chromatography (LC) determination of pheophorbide (Phor) a and pyropheophorbide (Pyro) a in health foods such as chlorella, spirulina, etc. The food sample was extracted with 85% (v/v) acetone. The extract was acidified with hydrochloric acid and loaded on a C18 cartridge. After washing with water, Phor a and Pyro a were eluted with the LC mobile phase. Phor a and Pyro a were separated by isocratic reversed-phase LC and quantitated by fluorescence detection. The recoveries for spiked samples of chlorella and the extract were 87.1–102.0%. Commercial health foods (chlorella, spirulina, aloe, kale, Jews mallow, and green tea leaves) were analyzed using the SPE method. The values found for Phor a and Pyro a ranged from 2 to 788 μg/g and from <1 to 24 μg/g, respectively. There was no significant difference between the SPE method and the official method in Japan (spectrophotometry after liquid–liquid extraction). The advantages of the SPE method are the short extraction times, lack of emulsions, and reduced consumption of organic solvents compared with the official method in Japan. The SPE method is considered to be useful for the screening of Phor a and Pyro a in health foods.

scholarly journals Determination of Organic Acids in Salicornia herbacea by Solid-phase Extraction Combined with Liquid Chromatography

2013 ◽  
Vol 8 (2) ◽  
pp. 1934578X1300800
Author(s):  
Damian Han ◽  
Minglei Tian ◽  
Dong Wha Park ◽  
Kyung Ho Row
Keyword(s):  
Solid Phase Extraction ◽  
Ferulic Acid ◽  
Caffeic Acid ◽  
Solid Phase ◽  
Phase Extraction ◽  
Relative Standard ◽  
Trifluoracetic Acid ◽  
Spe Method ◽  
Salicornia Herbacea

A solid-phase extraction (SPE) method for the determination of procatechuic acid, ferulic acid and caffeic acid in Salicornia herbacea L. (Hamcho) has been developed. The optimal conditions were obtained by using a C18 SPE cartridge. By using ethanol and acetonitrile /water/ trifluoracetic acid as washing and eluting solvents, most interfering compounds originating from the hamcho matrix were eliminated. The extracts were sufficiently clean to be directly injected into the HPLC for further chromatographic analysis. Good linearity was obtained from 0.1 to 200 μg/mL (r > 0.999) for procatechuic acid, 0.2 to 400 μg/mL (r > 0.999) for caffeic acid and 0.3 to 600 μg/mL (r > 0.999) for ferulic acid, with the relative standard deviations being less than 3.6%. The mean recoveries of procatechuic acid, ferulic acid and caffeic acid from hamcho were more than 79.2% and the detection limit (S/N = 3:1) was 0.02 μg/mL for procatechuic acid, 0.01 μg/mL for caffeic acid and 0.04 μg/mL for ferulic acid. This method is a viable alternative to the existing HPLC methods for analyzing the content of procatechuic acid, ferulic acid and caffeic acid in hamcho.

Determination of 19 anthelmintics in environmental water and sediment using an optimized PLE and SPE method coupled with UHPLC-MS/MS

2020 ◽  
Vol 719 ◽  
pp. 137516 ◽  
Author(s):  
Yiwen Li ◽  
Zhiwei Gan ◽  
Yunxiang Liu ◽  
Sibei Chen ◽  
Shijun Su ◽  
...  
Keyword(s):  
Environmental Water ◽  
Water And Sediment ◽  
Spe Method

scholarly journals Rapid Determination of Fluoroquinolone Residues in Honey by a Microbiological Screening Method and Liquid Chromatography

2010 ◽  
Vol 93 (4) ◽  
pp. 1331-1339 ◽  
Author(s):  
Maki Kanda ◽  
Tomoto Kusano ◽  
Setsuko Kanai ◽  
Hiroshi Hayashi ◽  
Yoko Matushima ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Liquid Chromatography ◽  
Fluorescence Detection ◽  
Efficient Method ◽  
Rapid Determination ◽  
Screening Method ◽  
Microbiological Method ◽  
Metal Free ◽  
Spe Method

Abstract A rapid and efficient method was developed for the simultaneous determination of seven fluoroquinolone (FQ) residues: norfloxacin, ciprofloxacin, danofloxacin, enrofloxacin, orbifloxacin, sarafloxacin, and difloxacin in honey. The samples were first screened with a microbiological method by using test plates made from metal-free purified agar seeded with Bacillus subtilis BGA. When a sample was found to contain FQ residues by using the microbiological method, it was analyzed by LC with fluorescence detection (LC/FL). FQs were extracted with Na2EDTA-McIlvaine buffer and purified by a dual SPE method in which a cation-exchange cartridge was connected to an anion-exchange cartridge. The overall recoveries of the seven FQs ranged from 70.0 to 92.1. The intra-assay and interassay CVs were 7.8 and 5.1, respectively. For the microbiological method, the LOD values ranged from 2 to 9 g/kg. For LC/FL, the LOQ values ranged from 2 to 7 g/kg. The developed method was used to analyze 70 honey samples. In 14 samples in which the microbiological method detected the presence of FQ residues, norfloxacin, ciprofloxacin, and enrofloxacin were identified by LC/FL.

Magnetic solid-phase extraction combined with in situ slurry cold vapor generation atomic fluorescence spectrometry for preconcentration and determination of ultratrace mercury

2014 ◽  
Vol 6 (9) ◽  
pp. 2876-2882 ◽  
Author(s):  
Wang-bing Zhang ◽  
Chu-xiao Sun ◽  
Xin-an Yang
Keyword(s):  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Atomic Fluorescence Spectrometry ◽  
Atomic Fluorescence ◽  
Cold Vapor Generation ◽  
Magnetic Solid ◽  
Magnetic Spe ◽  
Spe Method

A magnetic SPE method combined with CVG-AFS for the determination of Hg2+is established.

Determination of 15 PAEs in Fatty Food by SPE-GC/MS

2013 ◽  
Vol 469 ◽  
pp. 458-463
Author(s):  
Ying Hao Xing ◽  
Jun Wu
Keyword(s):  
Solid Phase ◽  
National Standard ◽  
Gas Chromatography Mass Spectrometry ◽  
Phthalic Acid Esters ◽  
Detection Rates ◽  
Plastic Packaging ◽  
Fatty Food ◽  
Spe Method ◽  
Acid Esters

Phthalic acid esters (PAEs) may be used as plasticizer and softener for the manufacturing of plastic products, especially in polyvinyl chloride (PVC). The residue of PAEs in food may affect human health. The method of qualitative analysis and quantitative analysis of 15 PAEs are established by total ion chromatogram (TIC) and select ion monitor (SIM) of gas chromatography-mass spectrometry (GC/MS). Combined with the solid phase extraction (SPE) method, PAEs residue of some fatty food in plastic packaging was detected, with the assessment of PAEs residual be discussed. The correlation coefficient was higher than 0.99. The limit of quantity was 2.93~105.23μg/kg and the limits of detection (LOD) for PAEs had values from 0.97μg/kg to 34.73μg/kg. This method was used for quantification of traces of PAEs in fatty food. The results showed that 9 PAEs residual in fatty food were at the range of <50~1160μg/kg and detection rates were between 16.67 %( 1:6) ~83.33 %( 5:6). None of them was out of national standard.

scholarly journals Determination of Debromo-bromobutide and 14 Organonitrogen Pesticides such as Dimepiperate in Agricultural Products by GC

1995 ◽  
Vol 36 (5) ◽  
pp. 613-621_1 ◽  
Author(s):  
Yukari TSUMURA ◽  
Yumiko NAKAMURA ◽  
Yasuhide TONOGAI ◽  
Kazumi NAKATSUKA ◽  
Tadashi SHIBATA
Keyword(s):  
Agricultural Products ◽  
Organonitrogen Pesticides
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