Laboratory evaluation of a prototype portable gas chromatograph (GC) with a flame ionization detector (FID) for toluene, ethylbenzene, and xylenes (TEX) analysis

Journal of Analytical Science and Technology

Table 2 Two-way ANOVA results

Target concentration	Method				Analyte				Method*Analyte
Target concentration	SS	F	df	p	SS	F	df	p	SS	F	df	p
ProtoGC—column 1 and conventional GC
1x	0.25	369.27	1	< 0.001	0.07	27.15	4	< 0.001	0.16	58.65	4	< 0.001
2x	0.44	58.44	1	< 0.001	0.71	23.52	4	< 0.001	0.91	29.94	4	< 0.001
4x	1.13	59.65	1	< 0.001	3.67	48.43	4	< 0.001	3.21	42.36	4	< 0.001
8x	39.21	1095.93	1	< 0.001	3.49	23.57	4	< 0.001	18.77	126.87	4	< 0.001
ProtoGC—column 2 and conventional GC
1x	0.25	235.53	1	< 0.001	0.10	23.41	4	< 0.001	0.12	28.77	4	< 0.001
2x	0.41	72.01	1	< 0.001	0.99	43.32	4	< 0.001	0.59	26.00	4	< 0.001
4x	1.06	63.23	1	< 0.001	4.63	68.79	4	< 0.001	2.88	42.75	4	< 0.001
8x	68.86	2061.78	1	< 0.001	5.52	41.35	4	< 0.001	19.46	145.64	4	< 0.001