Table 1. Atacama amino acid analyses.

		Concentration, ppm
Sample	Amino acid	HPLC	CE
AT01-12 24.1°S	Ala/Ser	0.031 ± 0.003	0.009 ± 0.006*
	Gly	Below blank	0.03 ± 0.03
	Glu	0.052 ± 0.005	Below blank
	Asp	Below blank	0.01 ± 0.01*
AT01-17 25.8°S	Ala/Ser	0.027 ± 0.003	0.01 ± 0.02
	Gly	Below blank	0.02 ± 0.04
	Glu	0.072 ± 0.007	Below blank
	Asp	Below blank	0.01 ± 0.01*
AT01-22 28.2°S	Val	Below blank	†
	γ-ABA	0.39 ± 0.04	0.56 ± 0.04†
	Ala/Ser	0.51 ± 0.05	0.17 ± 0.02
	Gly	0.073 ± 0.007	0.32 ± 0.07
	Glu	0.42 ± 0.04	0.36 ± 0.07
	Asp	0.14 ± 0.01	0.04 ± 0.01

All values are serpentine-blank corrected. Below blank, below concentration of serpentine blank.

^*Determined by 2-s direct injection.

^†Valine and γ-aminobutyric acid (γ-ABA) coelute in the CE separation but are resolved by HPLC.