scholarly journals BANNED ORGANOCHLORINE PESTICIDES RESIDUE STILL OCCUR IN CATTLE MILK FROM KHARTOUM STATE

2021 ◽  
Vol 9 (12) ◽  
pp. 25-31
Author(s):  
Sara Ahmed Mohamed ◽  
Afaf I. A ◽  
Sahar M. A ◽  
Abubakar A. S ◽  
Abdelbagi A. O ◽  
...  
Keyword(s):  
Petroleum Ether ◽  
Human Health ◽  
Organochlorine Pesticides ◽  
Silica Gel ◽  
Long Time ◽  
Pesticides Residue

Background: Pesticides application for controlling pests, has been a matter of debate for long time. In order to guarantee sustainable human health, this application should be monitored continuously. Materials and Methods: 65 samples of cattle milk were collected from different Khartoum state’s municipals; to assess the OCP residue, samples were extracted with petroleum ether and cleaned up using silica gel, then read out by GC equipped with FID. Result: Two pesticides belong to OCP were detected, Endosulfan (69.8%) and Heptachlor (92%); the detected concentration of the second one was outstanding, as all positive samples were above the MRL.

Impact of pyrethroids and organochlorine pesticides residue on IGF-1 and CYP1A genes expression and muscle protein patterns of cultured Mugil capito

2020 ◽  
Vol 188 ◽  
pp. 109876 ◽  
Author(s):  
Afaf.Abd El Megid ◽  
Mohammad E. Abd Al Fatah ◽  
Amel El Asely ◽  
Yakout El Senosi ◽  
Mahmoud M.A. Moustafa ◽  
...  
Keyword(s):  
Organochlorine Pesticides ◽  
Muscle Protein ◽  
Protein Patterns ◽  
Genes Expression ◽  
Pesticides Residue

scholarly journals Human Health Risk of Organochlorine Pesticides in Foods Grown in Nigeria

2017 ◽  
Vol 7 (15) ◽  
pp. 63-70 ◽  
Author(s):  
Aderonke O. Oyeyiola ◽  
Oluwatoyin T. Fatunsin ◽  
Latifat M. Akanbi ◽  
Damilola E. Fadahunsi ◽  
Muyideen O. Moshood
Keyword(s):  
Health Risk ◽  
Human Health ◽  
Organochlorine Pesticides ◽  
Human Health Risk

scholarly journals Detection of Methamphetamine, Methylenedioxymethamphetamine, and 3,4-Methylenedioxy-N-ethylamphetamine in Spiked Plasma by HPLC and TLC

2010 ◽  
Vol 93 (2) ◽  
pp. 556-561 ◽  
Author(s):  
Aysel Öztunç ◽  
Armağan Önal ◽  
Sidika Ertürk Toker
Keyword(s):  
Petroleum Ether ◽  
Silica Gel ◽  
Methyl Ketone ◽  
Aliphatic Amine ◽  
Normal Phase ◽  
Plasma Samples ◽  
Displacement Reaction ◽  
Mobile Phases ◽  
Spiked Plasma ◽  
Good Detection

Abstract HPLC and TLC methods were developed for separation and detection of some amphetamine analogs: methamphetamine (MA); 3,4-methylenedioxymethamphetamine (MDMA, ecstasy); and 3,4-methylenedioxy-N-ethylamphetamine (MDEA) in spiked plasma samples. The methods are based on purple chromogens formed by displacement reaction of these secondary aliphatic amine-bearing drugs with 7,7,8,8-tetracyanoquinodimethane at 80C for 25 min. For HPLC, both normal phase (silica gel) and RP (C18) columns were used. With the former, good detection limits in plasma were obtained with a 6 min run: 70, 100, and 500 ng/mL for MDMA, MA, and MDEA, respectively. For TLC, hexanechloroform (1 + 9) and benzene-diethyl ether-petroleum ether (4060)acetonitrileethyl methyl ketone (2 + 3.5 + 3.5 + 0.5 + 0.5) were used as mobile phases for silica gel 60 TLC and cyano-bonded silica gel HPTLC plates, respectively. The former offered more sensitive results than the latter. Influence of evaporation steps on recovery and interferences for the HPLC and TLC methods were investigated. The developed methods are selective, simple, and easily applicable.

Determination of Organochlorine Pesticides in Saussurea Costus by Ultrasonic Extraction and Solid-Phase Microextraction Method

2012 ◽  
Vol 554-556 ◽  
pp. 1947-1951
Author(s):  
Wei Liu ◽  
Du Shu Huang ◽  
Na Wu ◽  
Ju Cheng Zhang ◽  
Ping Yi ◽  
...  
Keyword(s):  
Petroleum Ether ◽  
Organochlorine Pesticides ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Volume Ratio ◽  
Ultrasonic Extraction ◽  
Extraction And Purification ◽  
Ultrasonic Time ◽  
Pre Treatment

Ultrasonic extraction and purification using solid-phase microextraction column for the determination of 7 types of organochlorine pesticides including α, β, γ, δ-BHC, 2,4 '-DDT, 4,4'-DDT and heptachlor from the Saussrrea cotus were investigated in this study. The pretreatment of Saussrrea cotus samples, the effect of different ultrasonic time on the extraction efficiency and the effect of different ratio of dichloromethane: petroleum ether on purification efficiency were studied. Results show that the satisfactory extraction conditions for pre-treatment process are: 30 minutes ultrasonic treatment; the volume ratio of dichloromethane and petroleum ether mixture is 3:7.

Rapid Screening Method for Analysis of Chlorinated Pesticide and Polychlorinated Biphenyl Residues in Fish

1974 ◽  
Vol 57 (3) ◽  
pp. 576-579
Author(s):  
D Ronald Erney
Keyword(s):  
Petroleum Ether ◽  
Silica Gel ◽  
Polychlorinated Biphenyl ◽  
Screening Method ◽  
Chromatographic Column ◽  
Rapid Screening ◽  
Routine Analysis ◽  
Chromatographic Columns ◽  
Fish Samples ◽  
Rapid Screening Method

Abstract Ground fish is dried with anhydrous Na2S04, packed into a chromatographic column, and extracted with petroleum ether. An aliquot of extract is cleaned up on miniature chromatographic columns of Florisil and silica gel. GLC analyses of a variety of fish samples by both the proposed procedure and multipesticide residue methods gave comparable results. The described procedure is rapid, economical, and applicable to routine analysis of fish samples.

scholarly journals Organochlorine Pesticides in Surface Water of Jiuxi Valley, China: Distribution, Source Analysis, and Risk Evaluation

2020 ◽  
Vol 2020 ◽  
pp. 1-8 ◽  
Author(s):  
Zheng Liu ◽  
Guanlin Zheng ◽  
Zhen Liu
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Human Health ◽  
Organochlorine Pesticides ◽  
Solid Phase ◽  
Source Analysis ◽  
Water Quality Criteria ◽  
Average Value ◽  
Sampling Points ◽  
Potential Risks

Residual levels of 11 organochlorine pesticides (OCPs) in surface water of Jiuxi Valley were determined during spring and autumn at nine sampling points to assess their contamination and potential risks. The water samples were extracted by solid-phase extraction (SPE), and OCPs were analyzed by gas chromatograph equipped with a 63Ni-ECD detector. The investigation results indicated that the concentration of total OCPs varied from 4.07 to 13.5 ng·L−1 with an average value of 7.15 ng·L−1 in spring, and from 12.5 to 30.1 ng·L−1 with an average value of 19.9 ng·L−1 in autumn. Jiuxi Valley was slightly contaminated by OCPs, and the concentrations of ΣHCHs and ΣDDTs in the river were at relatively low levels. HCHs were the main pollutant in spring, and also in autumn, and α-HCH was the main component of the HCH isomers at most sampling points. Source analysis indicated that local use of lindane or input of fresh γ-HCH contributed to the presence of HCHs. New inputs were the major sources of DDTs, aldrin, heptachlor, and endrin. The OCP levels of this investigation were within the standard limits set by a majority of the water quality standards and guidelines of China, WHO, European Union, and Canada. However, although the γ-HCH concentrations at all sampling sites, endrin concentrations at all sampling sites, and β-HCH concentrations at most sampling sites were below the human health water quality standard, and the levels of other tested OCPs (α-HCH, p,p′-DDD, p,p′-DDE, p,p′-DDT, aldrin, and heptachlor) exceeded the value of EPA-recommended water quality criteria for human health, which indicated potential risks to human health around the region.

High-Pressure Liquid Chromatography of Benzo (a) pyrene and Benzo(ghi)perylene in Oil-Contaminated Shellfish

1976 ◽  
Vol 59 (5) ◽  
pp. 989-992 ◽  
Author(s):  
Humberto Guerrero ◽  
Edward R Biehl ◽  
Charles T Kenner
Keyword(s):  
High Pressure ◽  
Liquid Chromatography ◽  
Petroleum Ether ◽  
Silica Gel ◽  
High Pressure Liquid Chromatography ◽  
High Pressure Liquid Chromatographic ◽  
Chromatographic Procedure ◽  
Liquid Chromatographic ◽  
Polynuclear Aromatics

Abstract A high-pressure liquid chromatographic procedure is described for the determination of benzo (a) pyrene and benzo(ghi)perylene. These polynuclear aromatics are extracted with acetonitrile and partitioned into petroleum ether, the petroleum ether is removed, and the residue is saponified. The compounds are purified and isolated by passing the residue through a silica gel column and a high-pressure liquid chromatographic column, and detected by their ultraviolet absorption. Recoveries of standards through the procedure averaged 104%.

Thin Layer Chromatographic Detection of Carum bulbocastanum Koch in Carum carvi Linn

1977 ◽  
Vol 60 (1) ◽  
pp. 235-236
Author(s):  
Asit R Sen ◽  
Pranab K Sardar ◽  
Pratima Sengupta
Keyword(s):  
Thin Layer ◽  
Essential Oils ◽  
Petroleum Ether ◽  
Silica Gel ◽  
Chromatographic Method ◽  
Carum Carvi ◽  
Chromatographic Detection

Abstract A rapid thin layer chromatographic method has been developed to detect Carum bulbocastanum Koch in Carum carvi Linn. The volatile essential oils are developed on silica gel G plates, using benzene-petroleum ether and visualized by 2,4-dinitrophenylhydrazine spray. This procedure can also differentiate mixtures of the 2 seeds.

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