Effect of changing air to hydrogen ratio on the performance of flame photometric detector (S-mode) in the analysis of Organophosphorus – Pesticides by GC-FPD

2016 ◽  
Vol 8 (13) ◽  
pp. 142-154
Author(s):  
A. Kilany ◽  
M. Elsayed ◽  
M. Abd ElMegid
Keyword(s):  
Organophosphorus Pesticides ◽  
Flame Photometric Detector ◽  
Photometric Detector

A General Method for Organophosphorus Pesticide Residues in Nonfatty Foods

1971 ◽  
Vol 54 (3) ◽  
pp. 513-516 ◽  
Author(s):  
R W Storherr ◽  
P Ott ◽  
R R Watts
Keyword(s):  
Potassium Chloride ◽  
Pesticide Residues ◽  
Organophosphorus Pesticides ◽  
Extraction Procedure ◽  
Organophosphorus Pesticide ◽  
Flame Photometric Detector ◽  
Chlorinated Hydrocarbon ◽  
Photometric Detector ◽  
General Method

Abstract A method is presented for determining residues of organophosphorus pesticides and alteration products in nonfatty foods. This method employs the acetonitrile extraction procedure as used by FDA for the chlorinated hydrocarbon pesticides. Cleanup is performed with a short charcoal column. GLC, using the potassium chloride thermionic detector or flame photometric detector, is used for determination. Forty-one organophosphorus pesticides and/or alteration products are evaluated.

scholarly journals Determination of Organophosphorus Pesticide Residues in Winter Bamboo Shoots by Homogenate Extraction Coupled with Gas Chromatography-Flame Photometric Detector

2020 ◽  
pp. 7-12
Author(s):  
Zhu Yu-Xin ◽  
Xu Liu-Yue ◽  
Feng Qi ◽  
Zhu Miao-Qin
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residues ◽  
Limit Of Detection ◽  
Organophosphorus Pesticides ◽  
Flame Photometric Detector ◽  
Photometric Detector ◽  
Bamboo Shoots ◽  
Homogenate Extraction ◽  
Relative Standard

Excessive use of organophosphorus pesticides (OPPs) in fruits and vegetables may affect human health. In this paper, a simple, rapid and effective method for the determination of five OPPs in winter bamboo shoots by gas chromatography-flame photometric detector (GC-FPD) was developed. Three extractants and three extraction methods were examined respectively. The results showed that the recovery rate was higher when the samples were extracted by acetonitrile and treated with homogenate extraction method. Under the optimized conditions, recoveries ranged from 82.12% to 91.48% with the relative standard deviation (RSD) of 1.51-4.20% and the limit of detection (LOD) of 0.005-0.02 μg/mL. Results showed that using acetonitrile as extractants and homogenate extraction in sample preparation is an effective method in determination of pesticide residues in winter bamboo shoots.

Improved Multiresidue Gas Chromatographic Determination of Organophosphorus, Organonitrogen, and Organohalogen Pesticides in Produce, Using Flame Photometric and Electrolytic Conductivity Detectors

1981 ◽  
Vol 64 (5) ◽  
pp. 1187-1195 ◽  
Author(s):  
Milton A Luke ◽  
Jerry E Froberg ◽  
Gregory M Doose ◽  
Herbert T Masumoto
Keyword(s):  
Petroleum Ether ◽  
Methylene Chloride ◽  
Organophosphorus Pesticides ◽  
Chromatographic Determination ◽  
Electrolytic Conductivity ◽  
Gas Chromatograph ◽  
Flame Photometric Detector ◽  
Initial Concentration ◽  
Photometric Detector

Abstract The multiresidue procedure of Luke et al., which uses extraction with acetone and partition with petroleum ether and methylene chloride, was simplified and shortened by eliminating the Florisil cleanup. Double concentration with petroleum ether in the Kuderna-Danish evaporator following the initial concentration removed the last traces of methylene chloride. The extract was then injected into a gas chromatograph, using a Hall electrolytic conductivity detector for organohalogen, organonitrogen, and organosulfur pesticides or a flame photometric detector for organophosphorus pesticides. Recoveries of 79 pesticides are presented.

scholarly journals Study of the Effect of Air to Fuel Ratio Parameter on the Organophosphorus – Pesticide Analysis by GC-FPD

2014 ◽  
Vol 36 ◽  
pp. 236-248
Author(s):  
A.Y. Kilany ◽  
Mohamed A. Elsayed ◽  
M.K. Abd El Megid ◽  
M.S. Fayed
Keyword(s):  
Dynamic Range ◽  
Organophosphorus Pesticides ◽  
Organophosphorus Pesticide ◽  
Acute Poisoning ◽  
Present Contribution ◽  
Flame Photometric Detector ◽  
Fuel Ratio ◽  
Relative Flow Rate ◽  
Photometric Detector ◽  
Relative Standard

In the present contribution, sensitive and precise method for the quantification of Organophosphorus / Pesticides (Malathion and Dimethoate) in nanograms range has been developed. The performance of flame photometric detector (FPD), a selective detector (P&S-mode) that can be used in the analysis of organophosphorus compound, is evaluated in terms of sensitivity, selectivity and reproducibility. The performance of flame photometric detector was strongly depending on the absolute and relative flow rate of air and hydrogen gases. The optimum air-to-fuel ratio for detection of Malathion and Dimethoate was 0.4 and 0.3 (FPD-P mode). At this ratio, low picogram amounts of phosphor can be detected accurately (0.18 pgP) with a wide linear dynamic range of 0.18 pgP to 298 ngP. While, the optimum air-to-fuel ratio, for detection of Malathion and Dimethoate was 0.6 (FPD-S mode). In addition to, the method is precise with 4.5 % relative standard deviation (RSD). In conclusion, it could be proposed that this procedure can be recommended as a suitable method for the quantification of Malathion and Dimethoate in cases of acute poisoning.

Gas Chromatographic Determination of Ametryn and Its Metabolites in Tropical Root Crops

1984 ◽  
Vol 67 (2) ◽  
pp. 280-284
Author(s):  
Promode C Bardalaye ◽  
Willis B Wheeler
Keyword(s):  
Anhydrous Sodium Sulfate ◽  
Residue Analysis ◽  
Gel Permeation Chromatography ◽  
Chromatographic Determination ◽  
Solvent System ◽  
Complete Separation ◽  
Flame Photometric Detector ◽  
Root Crops ◽  
Photometric Detector

Abstract Residue analysis of the herbicide ametryn (2-methyIthio-4-ethylamino-s-isopropylamino-s-triazine) is widely known but an analytical method for determining its metabolites has not yet been reported in the literature. A method has been developed for the extraction and determination of ametryn and 3 metabolites, 2-methylthio-4-amino-6-isopropylammo- s-triazine (GS-11354), 2-methylthio-4,6-diamino-.s-triazine(GS- 26831), and 2-methylthio-4-amino-6-ethylamino-s-triazine (GS-11355) in taniers, yams, cassava. Residues were extracted from crops with ethyl acetate-toluene (3 + 1 v/v), using a Polytron homogenizer and anhydrous sodium sulfate added for drying. The extracts were cleaned up by automated gel permeation chromatography on Bio-Beads SX-3 gel in the same solvent system. Quantitative determination was performed by gas chromatographic (GC) analysis on a column packed with 5% DEGS-PS on 100-120 mesh Supelcoport using either an N-P detector or a flame photometric detector (FPD) in the sulfur mode. Minimum detection by the flame photometric detector is 10 ng each for ametryn, GS-11354, and GS-11355 and 21 ng for GS-26831; by the N-P detector, 0.3 ng of each component gives easily quantitatable peaks. On a parts per million basis, starting with 25 g sample, the FPD detected a minimum level of 0.04 p.g/g each for ametryn, GS-11354, and GS-11355, and 0.08 p.g/g for GS-26831. The N-P detector could detect 0.0024 p.g/g for all 4 compounds. In addition to superior sensitivity, instrumental conditions allowed the complete separation of components in 10 min, for the N-P detector; more than 30 min was required for the FPD. Recoveries from fortified crops ranged from 67 to 111% at levels of 0.1-1.0 μg/g.

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