“…Generally, these determinations are carried out by gas chromatography (GC) or liquid chromatography (LC) [3,4,5,6,7,8,9,10,11,12,13,14,15,16]. Prior to the chromatographic separation, an efficient sample pretreatment is required.…”
Section: Introductionmentioning
confidence: 99%
“…Prior to the chromatographic separation, an efficient sample pretreatment is required. Several sample pretreatment procedures have been developed, of which liquid-liquid extraction (LLE) and solidphase extraction are the most common ones [2,3,4,5,6,7,11,13,14,15,16]. Other procedures including solidphase microextraction have also been applied [8,9,12].…”
A sample pretreatment method based on microporous membrane liquid-liquid extraction (MMLLE) was developed for the subsequent gas chromatographic determination of pesticides in wine. MMLLE provided efficient and selective extraction with enrichment factors in the range 3-13. The gas chromatographic separation was carried out using on-column injection and flame ionization detection. The method was linear, repeatable and sensitive. The limits of quantification were better than 0.006 mg/L for all the analytes except for iprodione (0.37 mg/L). The method was applied to the determination of pesticides in several red wines of different origin.
“…Generally, these determinations are carried out by gas chromatography (GC) or liquid chromatography (LC) [3,4,5,6,7,8,9,10,11,12,13,14,15,16]. Prior to the chromatographic separation, an efficient sample pretreatment is required.…”
Section: Introductionmentioning
confidence: 99%
“…Prior to the chromatographic separation, an efficient sample pretreatment is required. Several sample pretreatment procedures have been developed, of which liquid-liquid extraction (LLE) and solidphase extraction are the most common ones [2,3,4,5,6,7,11,13,14,15,16]. Other procedures including solidphase microextraction have also been applied [8,9,12].…”
A sample pretreatment method based on microporous membrane liquid-liquid extraction (MMLLE) was developed for the subsequent gas chromatographic determination of pesticides in wine. MMLLE provided efficient and selective extraction with enrichment factors in the range 3-13. The gas chromatographic separation was carried out using on-column injection and flame ionization detection. The method was linear, repeatable and sensitive. The limits of quantification were better than 0.006 mg/L for all the analytes except for iprodione (0.37 mg/L). The method was applied to the determination of pesticides in several red wines of different origin.
“…Many analytical methods are available for determining these residues in wine including both gas chromatography (GC) [7][8][9][10][11] and high-performance liquid chromatography (HPLC) [12][13], but only a few pesticides can be detected simultaneously. Nevertheless, a multiresidue determination of 15 pesticides has been carried out by RP-HPLC with UV detection [14], while a multiresidue GC method for determining 74 pesticides has also been proposed [9], using a phenylmethylsilicone capillary column with ECD and NPD detectors. These analytical methods usually require a previous clean-up procedure.…”
Section: Introductionmentioning
confidence: 99%
“…Liquid-liquid extraction with nonpolar solvents has been the most used technique [7-8, 11-12, 15]. Recently, the use of solid-phase extraction with C8 [14], C18 [9,13] and XAD-2 [10] cartridges has been proposed. Unfortunately, these overall procedures are complex to handle and time consuming.…”
SummaryA rapid method based on gas chromatography which determines parathion-methyl, fenitrothion, chlorpyrifos, dichlofluanid, vinclozolin, chlozolinate, procymidone and iprodione is described. It involves quantitative extraction with n-hexane and determination by capillary gas chromatography using an electron capture detector. Pesticides were satisfactorily separated in 15 rain with a phenylmethylsilicone fused-silica capillary column under isothermal conditions. Quantitation was carried out using dieldrin as internal standard. The method seems appropriate for oenological laboratory work because of its simplicity and rapidity. It was successfully used to identify and quantify pesticides studied in musts and wines.
“…Analisis pestisida menggunakan HPLC sebelumnya telah dilakukan seperti penentuan multiresidu pestisida dalam anggur [13] . Analisis pestisida confidor 200 SL menggunakan HPLC juga telah dilakukan oleh Nurhamidah dimana diperoleh perbandingan fasa gerak asetonitril:air yaitu 60:40, dengan laju alir 0,74 ml/menit serta waktu retensi 3 menit [14] .…”
Imidacloprid is active compounds in Confidor 200 SL with have toxical character. Degradation of Imidacloprid in Advanced Oxidation Processes (AOPs) method by using TiO 2 catalyst can reduce toxic level. Advanced Oxidation Processes (AOPs) method which is used is Sonolysis, Photolysis, and Ozonolisis. The result of sonolysis, Photolysis, and Ozonolysis measured by spectrophotometer UV-Vis with λ 400-600 nm, and than optimum degradation waste after addition of catalys measured by HPLC. The result of degradation of Imidacloprid 6 mg/L using sonolysis without addition catalys is more smallest from addition catalys which degradated in 60 minute, temperature 25±1 °C. At the same time with Photolysis methode for addition catalys we get the degradation is more biggest from addition catalys. Degradation percentage of imidacloprid without addition of TiO 2 -anatase reach is small from with addition of TiO 2 . Measure using HPLC for each methode we get more than one peak in chromatogram. It means there are other coumpounds in imidacloprid solution.
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