Application of activated carbon membranes for on-line cleanup of vegetable and fruit extracts in the determination of pesticide multiresidues by gas chromatography with mass selective detection

Sojo, Luis; Brocke, Andrea; Fillion, Julie; Price, Susan

doi:10.1016/s0021-9673(97)00721-8

Cited by 32 publications

(10 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The feasibility of using AC membranes as the solid phase for an on-line single step extraction-cleanup of fruits and vegetables for multi residue screening was studied in (Sojo et al, 1997). The type of carbon present in these membranes (an acid-washed coconut charcoal) seems to be able to discriminate between compounds containing benzene rings with small substituents from those with bulky substituents.…”

Section: Active Carbon For Organics-pesticidesmentioning

confidence: 99%

“…The removal processes for SO x and NO x can be designed using activated carbon fiber (ACF) for the environment of busy traffic crossings, parking spaces, and large halls as well (Malik, 2003), (Chuah et al, 2005) and (Ricordel et al, 2001) Palm kernel fibre Removal of ions (Ho Y and Ofomaja, 2005) and (Kadirvelu et al, (2003) Removal of Arsenic (Manju et al, 1998) Pitch-based carbons Adsorption of atrazine (Gullon and Font, 2001) and ) Activated carbons membranes Clean-up of fruits and vegetables (Sojo et al, 1997) …”

Section: In Gas Phase Adsorptionmentioning

confidence: 99%

See 1 more Smart Citation

Waste biomass as sources for activated carbon production-A review

Islam

Rouf

2013

Bangladesh J. Sci. Ind. Res.

View full text Add to dashboard Cite

show abstract

Section: Active Carbon For Organics-pesticidesmentioning

confidence: 99%

Section: In Gas Phase Adsorptionmentioning

confidence: 99%

Waste biomass as sources for activated carbon production-A review

Islam

Rouf

2013

Bangladesh J. Sci. Ind. Res.

View full text Add to dashboard Cite

show abstract

“…The introduction of GCB and polymer-based sorbents, such as DVB, has led to modifications of some multiclass, MRMs for pesticides in water, soils, and foods. 99,100 Carbon has been known as an excellent liquid -solid partitioning sorbent for many years, but carbon was notorious among chemists owing to the great number of charcoal types, sources, and irreproducibility. The advantages of certain polymer-based sorbents in reversed-phase applications over silica-based sorbents include higher possible flow rates, wider pesticide polarity range, wider pH range, and allowance of the cartridge to go dry without losses.…”

Section: Solid-phase Extractionmentioning

confidence: 99%

“…For example, the use of a carbon or alumina (traditionally normal-phase sorbents) with acetonitrile (a solvent more common in the reversed-phase format) may separate interferences from analytes reasonably well in multiclass, multiresidue applications. 100 Also, stationary phases used in ion-exchange approaches, which have the strongest interactions in water, are used with nonaqueous mobile phases in multiclass, multiresidue procedures. 51 The use of liquid -solid partitioning with charcoal, silica, Florisil and/or alumina is also possible to aid in the removal of lipids, but semipolar pesticides require large elution volumes and many relatively polar pesticides are completely retained by these adsorbing phases.…”

Section: Solid-phase Extractionmentioning

confidence: 99%

Multiclass, Multiresidue Analysis of Pesticides, Strategies for

Lehotay¹

2000

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

Strategies for multiclass, multiresidue analysis of pesticides depend on several factors that all derive from three fundamental considerations: (1) the need for the results; (2) the form and composition of the matrix; and (3) the time, resources, and technology available to the analyst. First, the need for the data dictates the quality assurance (QA)/quality control (QC) guidelines and the desired analytical figures of merit, such as limits of detection (LOD) and the accuracy and precision of the results. These needs also contribute to the choice of pesticide analytes, which sets the polarity range for the analysis. No single method can determine all pesticides in diverse matrices, so an overall strategy is often used to compartmentalize a series of approaches in order best to detect the targeted pesticides in an effective and efficient process. Second, the various types of matrices that are commonly analyzed for pesticide residues may affect the sample preparation approach employed in the analytical strategy. Common matrices for pesticide analysis consist of solids, liquids, and gases in applications associated with food, agricultural, environmental, and other sample types. Varying degrees of pesticide–matrix interactions in different materials require more or less stringent extraction procedures to separate the pesticides from the sample. Sample preparation in multiclass, multiresidue strategies frequently utilizes liquid–solid, liquid–liquid and other partitioning processes including those, such as pressurized fluid extraction (PFE), in which pressure and temperature of different fluids are controlled. Extracts often require cleanup to remove interfering co‐extracted matrix components prior to analysis. A variety of cleanup techniques based on a number of partitioning processes, such as liquid chromatography (LC), may be employed in an on‐line or off‐line fashion. Lastly, the sample extract is usually further separated and analyzed using one or more techniques. The majority of pesticides are analyzed by gas chromatography (GC) with mass spectrometry (MS) and/or element‐selective GC detectors. High‐performance liquid chromatography (HPLC) is often used in the analysis of thermally labile pesticides that are not amenable to GC analysis. Other alternatives for analysis of certain pesticide include capillary electrophoresis (CE) and immunoassays. Fundamentally, a high degree of selectivity helps in generating excellent analytical results, but the wide polarity range of analytes in multiclass, multiresidue methods (MRMs) for pesticides necessitates a great deal of effort to attain a high degree of selectivity. Trade‐offs and compromises are omnipresent in multiclass, multiresidue analysis of pesticides, and a host of strategies are available depending on how the analytical chemist prioritizes the analytical and practical considerations.

show abstract

“…The OCPs are the first target residual contaminants because they are still used in many countries. Furthermore, OCPs possess a long half-life, high accumulation, potentially harmful biological effects, and detrimental impacts on the environment (Cai et al, 1997;Sojo et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Supercritical fluid extraction for the separation of organochlorine pesticides residue in Angelica sinensis

Zhao

Hao

Huan-xin

et al. 2002

Biomedical Chromatography

View full text Add to dashboard Cite

A method involving the simultaneous extraction and separation of 12 organochlorine pesticides (OCPs) from Angelicae sinensis was developed using supercritical fluid extraction (SFE). The pesticides in the study were alpha-, beta-, gamma- and delta-benzene hexachloride, PCNB (pentachloro- nitrobenzene), PCA (pentachloroaniline), HEPT (heptachlor), MPCPS (methyl-pentachlorophenyl sulfide), pp'-DDE [1,1-dichloro-2,2-bis (p-chlorophenyl) ethylene], op'-DDT [1,1,1,-trichloro-2-(o-chlorophenyl)-2-(p-chlorophenyl) ethane], pp'-DDD [1,1-dichloro-2,2-bis(p-chlorophenyl) ethane], and pp'-DDT [1,1,1,-trichloro-2,2-bis (p-chlorophenyl)ethane]. The extraction conditions were optimized as follows: pure CO(2), extraction pressure 15 MPa, extraction temperature 60 degrees C, extraction time 20 min, and flow-rate 1.5 mL/min. A GC method with electron capture detection was employed to determine the OCPs in Angelicae sinensis. An HPLC method was developed for the quantitative determination of active constituents. The SFE provided high decontamination rate of OCPs and low loss of active constituents in Angelicae sinensis.

show abstract

Application of activated carbon membranes for on-line cleanup of vegetable and fruit extracts in the determination of pesticide multiresidues by gas chromatography with mass selective detection

Cited by 32 publications

References 11 publications

Waste biomass as sources for activated carbon production-A review

Waste biomass as sources for activated carbon production-A review

Multiclass, Multiresidue Analysis of Pesticides, Strategies for

Supercritical fluid extraction for the separation of organochlorine pesticides residue in Angelica sinensis

Contact Info

Product

Resources

About