Solid-phase extraction disks

For water, bispyribac is extracted with a Cig solid-phase extraction disk. After methylation, bispyribac-methyl is determined by gas chromatography. 

Fig. 18.1 Systems used to absorb aroma compounds from samples for analytical purposes, a Traps loaded with various adsorbents [4]. b Solid-phase extraction (disk in a holder assembly) [5]. c Solid-phase microextraction (coated needle inserted in sample) [5]. d Twister (1 -cm length) [4]. (Courtesy of GERSTEL GmbH and Co. KG)...

Sulfonylurea herbicides and metabolites C02-methanol Using Ci8 solid phase extraction disk High-performance liquid chromatography with UV detection. Dimethyl sulfonyl ureas determined by GC with detection by electron capture or N-P or MS. [162,163]... 

Redondo, M.J., M.J. Ruiz, R. Boluda, and G. Font (1993). Determination of pesticides in soil samples by solid phase extraction disks. 

Senseman, S.A., T.L. Lavy, and J.D. Mattice (1995). Desiccation effects on stability of pesticides stored on solid-phase extraction disks. Anal. Chem., 67 3064-3068. 

Thurman, E.M., and K. Snavely (2000). Advances in solid-phase extraction disks for environmental chemistry. Trends Anal. Chem., 19 18-26. 

Senseman, S.A., Lavy, T.L., Matice, J.D., Gbur, E.E. (1995) Influenced of dissolved humic acid and Ca-montmorilloinite clay on pesticide extraction efficiency from water using solid-phase extraction disks. Environ. Sci. Technol. 29, 2647-2653. 

Ringo MC, Allen JR, Mattocks DM. 2003. Mobile-phase cleanup using solid-phase extraction disks. LCGC North America 21 168-178. 

Gasanova, J. A, 1996. Use of solid-phase extraction disks for analysis of moderately polar and nonpolar pesticides in high-moisture foods, 7. AOAC Int., 79 936-940. 

Solid-phase extraction disks Solid-phase extraction products... 

Whatman Inc, 9 Bridewell PL Clifton, NJ 07014 (201)773-5800 (201) 472-6949 FAX Solid-phase extraction disks Solid-phase extraction products... 

One recent application in lEC consists of solid phase extraction disks which are used to eliminate matrix interference prior to analysis. The disk contains a membrane composed of resin beads enmeshed in a PTFE membrane, housed in a polypropylene housing. The resin is treated to remove specific ions such as H+ to remove hydroxide, Ag+ for excess halides and Ba to remove sulphate. Other disks such as hydroxide for acid removal and neutral styrene-divinylbenzene to eliminate hydrophobic components which can damage resin based IC columns are being developed [23]. 

R. Saari-Nordhaus, L. M. Nair, and J. M. Anderson Jr., Elimination of Matrix Interferences in Ion Chromatography using Solid Phase Extraction Disks, PittCon 93, Atlanta, GA, U.S.A. 

Sample preparation 1 mL Whole blood + cyclosporine D in MeCN, centrifuge. Remove the supernatant and dilute it with water, add to a solid-phase extraction disk (15 mg SPEC RP 18 AR), wash with MeCN water 20 80, wash with n-hexane, elute with MeCN. Evaporate the eluate to dryness, reconstitute, inject an aliquot. 

Wenk, M. Haefeli, W.E. Improved determination of cyclosporine and its metabolites using solid phase extraction disks and normal phase liquid chromatography (Abstract 72). Ther.Drug Monit., 1995,17, 401... 

Brown, J. N. and Peake, B. M., Determination of colloidally-associated polycyclic aromatic hydrocarbons (PAHs) in fresh water using solid phase extraction disks. Anal. Chim. Acta, 486, 159-169, 2003. 

Thompson, T. S. and Miller, B. D., Use of solid-phase extraction disks for the GC-MS analysis of acidic and neutral herbicides in drinking water, Chemosphere, 36, 2867-2878, 1998. 

Albanis, T. A., Hela, D. G., Sakellarides, T. M., and Konstantinou, I. K., Monitoring of pesticide residues and their metabolites in surface and underground water of Imathia (N. Greece) by means of solid-phase extraction disks and gas chromatography, J. Chromatogr. A, 823, 59-71, 1998. 

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