scholarly journals Development and optimization of a method for the determination of simazine, atrazine and propazine using solid-phase extraction and HPLC/GC

2001 ◽  
Vol 66 (3) ◽  
pp. 199-204 ◽  
Author(s):  
Vera Trajkovska ◽  
Simka Petrovska-Jovanovic ◽  
Mirko Cvetkovski
Keyword(s):  
Solid Phase Extraction ◽  
Simultaneous Determination ◽  
Water Samples ◽  
Solid Phase ◽  
Detection Limits ◽  
Phase Extraction ◽  
Standard Curve ◽  
Spe Method

Asolid-phase extraction (SPE) method, coupled with HPLC/DAD and GC/FID analysis has been developed for the simultaneous determination of simazine, atrazine and propazine in water samples. The compounds of interest were enriched on Envi-carb SPE tubes. The recoveries for simazine, atrazine and propazine from spiked Nanopure water were 101 5.6 %, 99 4.9 % and 96 5.7 %, respectively. The detection limits were 4.00, 8.00 and 10.00 ng absolute samplemass in the column for simazine, atrazine and propazine, respectively. Standard curve r2 values of 0.9828-0.9988 for the analyzed compounds were consistently obtained.

scholarly journals Simultaneous Determination of Imazalil and Its Major Metabolite in Citrus Fruit by Solid-Phase Extraction and Capillary Gas Chromatography with Electron Capture Detection

2001 ◽  
Vol 84 (2) ◽  
pp. 546-550 ◽  
Author(s):  
Hisashi Matsumoto
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Extraction ◽  
Simultaneous Determination ◽  
Capillary Gas Chromatography ◽  
Solid Phase ◽  
Citrus Fruit ◽  
Electron Capture Detection ◽  
Phase Extraction ◽  
Spe Method

Abstract A method was developed for the simultaneous determination of imazalil and its major metabolite, R 14821, in citrus fruit. This method (designated the SPE method) is based on solid-phase extraction (SPE) and capillary gas chromatography (GC) with electron-capture detection (ECD). The SPE method is highly sensitive for both compounds (limit of detection for each: 0.001 μg/g) and is less time consuming than the previously reported method based on repeated liquid–liquid partitioning and GC–ECD. Recoveries for 3 levels of fortification (0.02, 0.2, and 2.5 μg/g) from satsuma mandarins ranged from 94.3 to 96.5% for imazalil and from 93.9 to 96.3% for R 14821, with coefficients of variation (CVs) ranging from 3.1 to 6.3% for imazalil and from 4.5 to 5.6% for R 14821. Average residual levels found in grapefruit, oranges, and lemons by the SPE method and the previously reported method, and the corresponding CVs, were similar.

scholarly journals Determination of Benzophenones in Water and Cosmetics Samples: A Comparison of Solid-Phase Extraction and Microextraction by Packed Sorbent Methods

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6896
Author(s):  
Grażyna Wejnerowska ◽  
Izabela Narloch
Keyword(s):  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Pollution Assessment ◽  
Extraction Methods ◽  
Phase Extraction ◽  
Microextraction By Packed Sorbent ◽  
Spe Method ◽  
Packed Sorbent

Benzophenones (BPs) are extensively used in a wide variety of cosmetic products and other materials (e.g., textiles or plastics) to avoid damaging effects of UV radiation. In the present work, we compared two extraction methods for the determination of BPs, namely, 2,4-dihydroxybenzophenone (BP-1), 2-hydroxy-4-methoxybenzophenone (BP-3) and 2,2-dihydroxy-4-methoxybenzophenone (BP-8), in water and cosmetics samples. The following extraction methods were used for the research: solid-phase extraction (SPE) and microextraction by packed sorbent (MEPS), whereas analysis was performed by gas chromatography with mass spectrometric detection. A comparison between the methods indicates that the MEPS technique(s) can be reliably used for analysis of BPs (sunscreen residue) in water samples and cosmetic samples with satisfactory results. This microextraction technique is cheap, easy, quick to implement, and consumes small amounts of solvents. On the other hand, the main advantage of the SPE method are low detection limits for the determination of BPs in water samples, i.e., from 0.034 to 0.067 µg L−1, while, for the MEPS method, LODs were at the level of 1.8–3.2 µg L−1. For both methods, the recoveries of BPs were 96–107% and 44–70% for water and cosmetics samples, respectively. The presented methods are suitable for use in cosmetics quality control and environmental pollution assessment.

Simultaneous Determination of Cationic and Anionic Surfactants in Environmental Water Samples by Ion-Pair Liquid Chromatography/Mass Spectrometry

2020 ◽  
Vol 7 (1) ◽  
pp. 57-64
Author(s):  
Atsuko Nishigaki ◽  
Kana Miyazaki ◽  
Nobuko Suzuki ◽  
Kazushige Kojima ◽  
Kazunori Saitoh ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Simultaneous Determination ◽  
Water Samples ◽  
Anionic Surfactants ◽  
Solid Phase ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Phase Extraction ◽  
Liquid Chromatography Mass Spectrometry

Background:: Cationic surfactants (CSs) such as quaternary ammonium compounds are used as fabric softeners, anti-bacterial agents, and human hair cosmetics. Accurate determination of CSs in environmental water samples is very difficult because of their very low concentration and strong adsorptivity to not only glassware but also to plasticware due to strong hydrophobic and electrostatic attractions. Linear alkylbenzene sulfonates (LASs), anionic surfactants, are produced in the largest quantity as the main components of laundry detergents, dishwashing liquids, and other cleaning formulations. In this study, a liquid chromatography/mass spectrometry (LC/MS) method was developed for simultaneous determination of CSs, cetyltrimethylammonium ion (CTMA) and trimethylstearylammonium ion (TMSA), and LASs in environmental water samples. Materials and Methods: This method involves a solid-phase extraction of CSs and LASs from the water samples using a solid-phase extraction cartridge, InertSep Slim-J PLS-3. A hydrophilic polymer column, Shodex MSpak GF-310 4D was used for the separation of CSs and LASs with a mobile phase gradient from 36 to 44 % (v/v) acetonitrile-water containing 0.8 mM di-nbutylammonium acetate and 0.2 M acetic acid. Di-n-butylammonium ion acts as the ion-pair reagent for retention of LASs on the column, while it makes the retention of CSs moderate. Positive and negative electrospray ionization modes were used for the MS detection for CSs and LASs, respectively. Results and Discussion: Instrument detection limits of the developed method based on selected ion monitoring technique for the mixed standard solutions of CSs and LASs were 3 and 6 ng L-1 for CTMA and TMSA, respectively and 13 – 47 ng L-1 for the C10-C14 LASs. The total concentration of the CSs was determined to be 6.6 μg L-1 for river water (Ebi river, Japan) and 0.028 μg L-1 for seawater (Tokyo Bay, Japan) samples. The concentration of total LAS was determined to be 1122 μg L-1 for the river and 10.8 μg L-1 for the seawater samples. Conclusion:: These results demonstrate that the solid-phase extraction and the LC/MS method developed in this study are useful for the simultaneous determination of trace amounts of CSs and LASs in environmental water samples.

Sign in / Sign up

Export Citation Format

Share Document