Fig. 2From: Laboratory evaluation of a prototype portable gas chromatograph (GC) with a flame ionization detector (FID) for toluene, ethylbenzene, and xylenes (TEX) analysisCorrelation of mean concentrations between (A) protoGC- Column 1 and conventional GC and (B) protoGC- Column 2 and conventional GC by analyteBack to article page