Evaluation of Accelerated Solvent Extraction (ASE) for Analysis of Pesticide Residues in Soil

Abstract

Accelerated solvent extraction, or ASE, is a new extraction technique that is similar in principle to Soxhlet extraction, but the use of elevated temperature and pressure with ASE allows the extraction to be completed within a short time and with a small quantity of solvent. In this study, we investigated the effect of residue aging, solvent type, and ASE conditions on the recovery of atrazine and alachlor from different soils and compared the efficiency of ASE with that of Soxhlet and solvent−shake extractions. With ASE, the use of dichloromethane−acetone (1:1, v/v) or methanol as solvent resulted in significantly greater pesticide recovery than hexane. After the residue was aged for >2 weeks, pesticide recovery was significantly influenced by the extraction temperature in ASE vessel, and the recovery increased to 130−140 °C and then decreased. The efficiency of ASE was generally better than that for Soxhlet or shake extraction using methanol−water (4:1, v/v). ASE extraction also consumed considerably less solvent than the other two conventional methods.

Persistence of 14C-labeled atrazine and its residues in a field lysimeter soil after 22years

“…An Accelerated Solvent Extraction (ASE) device (ASE 200, Dionex) was used to extract the soils. The ASE-extraction was similar to the extraction method previously described by Gan et al (Gan et al, 1999). In this study, a methanol-water solution (4:1 v:v) was used for extraction since results showed slightly higher residual 14 C-activity in the extracts than when using methanol alone, consistent with previous findings (Huang and Pignatello, 1990).…”

“…As given in Figure 1, most residual 14 C-activity was extracted in the first extraction step. The applied ASE-settings in accordance with Gan et al (Gan et al, 1999) were highly effective for the extraction of aged atrazine residues from soil and homogenized gravel using a methanol-water solution, as previously suggested (Huang and Pignatello, 1990). In comparison to previous extraction studies using vigorous shaking with water (Jablonowski et al, 2008a) or Soxhlet extraction (data not shown), the ASE yielded a considerably greater amount of aged atrazine residues; approximately 60 % of the total residues in the respective layer in the case of soil and 93 % in the case of homogenized gravel (Table 1).…”

Advantage of solvothermal procedure for polychlorinated biphenyls removal from e-waste contaminated site

“…But as for PCB66, PCB118, PCB153, PCB138, PCB180 and PCB170, it was contrary. This different trend was attributed to the different polarities of these congeners and solvents [38]. Furthermore, isopropanol showed its superiority over hexane/acetone and methanol in all cases.…”

“…Although PCBs are insoluble under ambient atmosphere and temperature, bound PCBs were quickly dissolved by organic solvent in the sealed pressure vessel at the increased temperature. The role of pressure was important in that a slight higher pressure keeps the solvent in the liquid phase at a high temperature as described by Gan et al [38] for accelerated solvent extraction. According to previous reports [12,13], bound PCBs were partitioned into different components of soil.…”

Preparation of Samples for Determining Heavy Metals Fe and Mn in Vegetable Oils: a Comparison of Different Extraction Methods

“…It can also be assumed that with such a difficult matrix, rich in fats, carbohydrates and proteins, at least one of the following processes should be used: microwave mineralization, increased pressure, incineration, and dissolution in acid. Taking these four methods into account, four basic groups of methods of preparing vegetable oil samples can be distinguished in the determination of heavy metals [7,[10][11][12][13][14][15]:…”