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  • Optimization of the coating procedure for a high-throughput 96-blade solid phase microextraction system coupled with LC-MS/MS for analysis of complex samples.

Optimization of the coating procedure for a high-throughput 96-blade solid phase microextraction system coupled with LC-MS/MS for analysis of complex samples.

Analytical chemistry (2011-06-30)
Fatemeh S Mirnaghi, Yong Chen, Leonard M Sidisky, Janusz Pawliszyn
ABSTRACT

Biocompatible C18-polyacrylonitrile (PAN) coating was used as the extraction phase for an automated 96-blade solid phase microextraction (SPME) system with thin-film geometry. Three different methods of coating preparation (dipping, brush painting, and spraying) were evaluated; the spraying method was optimum in terms of its stability and reusability. The high-throughput sample preparation was achieved by using a robotic autosampler that enabled simultaneous preparation of 96 samples in 96-well-plate format. The increased volume of the extraction phase of the C18-PAN thin film coating resulted in significant enhancement in the extraction recovery when compared with that of the C18-PAN rod fibers. Various factors, such as reusability, reproducibility, pH stability, and reliability of the coating were evaluated. The results showed that the C18-PAN 96-blade SPME coating presented good extraction recovery, long-term reusability, good reproducibility, and biocompatibility. The limits of detection and quantitation were in the ranges of 0.1-0.3 and 0.5-1 ng/mL for all four analytes.

MATERIALS
Product Number
Brand
Product Description

Supelco
Bottle-type sprayer, capacity 240 mL
Supelco
Tube-type sprayer, capacity 50 mL
Supelco
Aldrich® flask-type sprayer, size 250 mL
Supelco
Reagent sprayer for TLC plates, volume 250 mL, Bottle-Type