Table 1. Compositional analysis of untreated and pretreated switchgrass.

Component	Untreated (%)	Dilute Acid (%)	AFEX (%)	Ionic liquid (%)
glucan	35.13±2.50	55.77±5.94	34.12±3.53	38.33±1.69
xylan	20.05±0.66	7.79±0.88	20.84±2.27	21.41±0.84
lignin	21.15±2.12	31.51±0.01	20.04±0.23	18.50±0.04

Compositional analysis was performed on milled biomass prior to fractionation. Data shown are a representation of three independent measurements (see Material and Methods).