Cloud-point extraction coupled to in-situ metathesis reaction of deep eutectic solvents for preconcentration and liquid chromatographic analysis of neonicotinoid insecticide residues in water, soil and urine samples

Abstract Apples from trees treated in the field at 2-week intervals (9 foliar applications) with the synthetic pyrethroid insecticide fenvalerate (cyano(3-phenoxyphenyL)methyl 4-chloro-alpha-(1-methylethyl)- benzeneacetate) were processed into apple sauce, juice, pomace, and peels plus cores. Gas-liquid chromatographic analysis of the commodities for fenvalerate showed the sauce and juice to be essentially residue-free, the whole apples to contain about 0.4 ppm, and the pomace and peels plus cores to contain about 2 and 1.5 ppm, respectively. Agreement among 5 laboratories using modifications of the same basic method was good.

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Ultrasonically Modified Amended-Cloud Point Extraction for Simultaneous Pre-Concentration of Neonicotinoid Insecticide Residues

Molecules ◽

10.3390/molecules23051165 ◽

2018 ◽

Vol 23 (5) ◽

pp. 1165 ◽

Cited By ~ 3

Author(s):

Rawikan Kachangoon ◽

Jitlada Vichapong ◽

Rodjana Burakham ◽

Yanawath Santaladchaiyakit ◽

Supalax Srijaranai

Keyword(s):

Cloud Point ◽

Cloud Point Extraction ◽

Insecticide Residues ◽

Neonicotinoid Insecticide

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Cloud point preconcentration and high-performance liquid chromatographic analysis with electrochemical detection

Analytical Chemistry ◽

10.1021/ac00044a006 ◽

1992 ◽

Vol 64 (20) ◽

pp. 2334-2338 ◽

Cited By ~ 26

Author(s):

Carmelo. Garcia Pinto ◽

Jose Luis. Perez Pavon ◽

Bernardo. Moreno Cordero

Keyword(s):

Cloud Point ◽

Electrochemical Detection ◽

Chromatographic Analysis ◽

High Performance ◽

High Performance Liquid Chromatographic ◽

Liquid Chromatographic Analysis ◽

Liquid Chromatographic

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IMMOBILIZATION TECHNIQUE FOR IN SITU BIODEGRADATION OF CRUDE OIL

International Oil Spill Conference Proceedings ◽

10.7901/2169-3358-1995-1-912 ◽

1995 ◽

Vol 1995 (1) ◽

pp. 912-913

Author(s):

Asha Juwarkar ◽

Aradhana Amin ◽

Bharati Oke ◽

P. Khanna

Keyword(s):

Crude Oil ◽

Chromatographic Analysis ◽

Oil Spills ◽

Nitrogen And Phosphorus ◽

Phosphorus Containing ◽

Carrier Molecule ◽

Liquid Chromatographic Analysis ◽

Liquid Chromatographic ◽

In Situ Biodegradation

ABSTRACT An immobilization technique was developed and standardized for seeding oil spills with specific oil degrading microorganisms, fertilizing them with nitrogen- and phosphorus-containing salts and controlling the further spread of the oil spill. Thermocol was used as a carrier molecule on which nutrients as well as microbial cells were adsorbed. Studies were carried out to correlate the amount of biodegradation to that of release of nitrogen and phosphorus adsorbed on the carrier molecule. The release of nutrients from the carrier molecule was slow: 76 percent of the crude oil was degraded in 3 days at nitrogen and phosphorus concentrations of 36.19 mg and 8.15 mg respectively as revealed by gas liquid chromatographic analysis. Without addition of nutrients, 62 percent of the crude oil was degraded in 9 days.

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