Analysis of the Herbicide Bispyribac-sodium in Rice by Solid Phase Extraction and High Performance Liquid Chromatography

submitted by kwblost 2 years and 3 months ago - Topic: Environment

Bispyribac-sodium is a commonly used herbicide. An analytical method employing HPLC with a diode array detector was developed to determine bispyribac-sodium residues in rice. The liquid–liquid partition and anion exchange solid phase procedures that were developed provide effective extraction and cleanup methods for analysis feasibility. Recoveries ranged from 83.98 to 98.51% with a relative standard deviation of .56–6.36% and sensitivity of .1 mg/kg. Bispyribac-sodium residues in rice were further confirmed by LC–MS. The proposed method was successfully applied to the analysis of bispyribac-sodium residues from a rice field in Jiangxi Province that had been treated using bispyribac-sodium.

submitted by pioci 3 months ago - Topic: Environment

A new methodology has been developed for the determination of secondary alkane sulfonates (SAS), an anionic surfactant, in environmental matrices. Sediment and sludge samples were extracted using pressurized liquid extraction and sonication, whereas wastewater and surface water samples were proc...

Determination of clomazone residues in soybean and soil by high performance liquid chromatography with DAD detection

submitted by komolkamor 2 years and 2 months ago - Topic: Environment

A simple analysis method to detect clomazone residues in soybean and soil was developed using solid phase extraction coupled with high performance liquid chromatography with diode-array detection. The pesticide residues present in soybean and soil matrices were extracted with methanol–water and...

Development of an HPLC method to analyze four veterinary antibiotics in soils and aqueous media and validation through fate studies

submitted by nerzor 9 months ago - Topic: Environment

A simple, yet robust analytical method was developed to detect and quantify three sulfonamides (SA), namely sulfamethoxazole (SMO), sulfachloropyridazine (SCP), and sulfamethazine (SM), and a macrolide tylosin () in aqueous (calcium chloride and leachate solutions) and solid (agricultural soils) ...

Occurrence of cyclophosphamide and epirubicin in wastewaters by direct injection analysis–liquid chromatography–high-resolution mass spectrometry

submitted by bartek 1 year and 2 months ago - Topic: Environment

According to the high incidence of cancer worldwide, the amount of cytostatic drugs administered to patients has increased. These compounds are excreted to wastewaters, and therefore become potential water contaminants. At this stage, very little is known on the presence and elimination of cytost...

Occurrence, distribution, and seasonal variation of estrogenic compounds and antibiotic residues in Jiulongjiang River, South China

submitted by LuiJusti 10 months ago - Topic: Environment

Estrogenic compounds and antibiotic residues in environment are receiving significant attention because of their potential adverse effects on ecosystems and human health. The objectives of this study were to determine the occurrence and seasonal variability of eight kinds of estrogenic compounds ...

Improved method for analyzing the degradation of estrogens in water by solid-phase extraction coupled with ultra performance liquid chromatography-ultraviolet detection

submitted by JaiSalva 2 years and 1 month ago - Topic: Environment

We established an improved method for the determination of four estrogens including estriol (E3), 17β-estradiol (E2), 17α-ethynylestrodiol (EE2) and estrone (E1) in water. The method consisted of solid-phase extraction (.5 L water) and subsequent analysis of analytes by ultra-performance liquid...

A simple and efficient multi-residue method based on QuEChERS for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry

submitted by sonkorrom 1 year and 6 months ago - Topic: Environment

In this study, a rapid, specific and sensitive multi-residue method based on acetonitrile extraction followed by dispersive solid-phase extraction (d-SPE) clean-up was implemented and validated for multi-class pesticide residues determination in palm oil for the first time. Liquid–liquid extrac...

Biodegradation of the Anionic Surfactant Linear Alkylbenzene Sulfonate (LAS) by Autochthonous Pseudomonas sp

submitted by savs 10 months ago - Topic: Environment

Anionic surfactants, the earliest and the most common surfactants in detergent and cosmetic product formulations contribute significantly to the pollution profile of the ecosystem. Linear alkylbenzene sulfonates (LAS), a major chemical constituent of detergents, forms an imperative group of anion...

Cloud Point Extraction With Triton X-114 for Separation of Metsulfuron-Methyl, Chlorsulfuron, and Bensulfuron-Methyl From Water, Soil, and Rice and Analysis by High-Performance Liquid Chromatography

submitted by soteshkappalo 2 years and 5 months ago - Topic: Environment

A new and efficient analytic methodology based on cloud point extraction (CPE) was developed for determination of pesticide residues of metsulfuron-methyl (MSM), chlorsulfuron (CS), and bensulfuron-methyl (BSM) in water, soil, and rice grain by high-performance liquid chromatography (HPLC). Multi...

Analysis of perfluoroalkyl substances in waters from Germany and Spain

submitted by KhaAlfred 11 months ago - Topic: Environment

Water has been identified as one of the main routes of human exposure to perfluoroalkyl substances (PFASs). This work assessed the presence of 21 PFASs along the whole water cycle using a new fast and cost effective analytical method based on an online sample enrichment followed by liquid chromat...