Geographical Origin Traceability of Red Wines Based on Chemometric Classification via Organic Acid Profiles

Table 2

Instrumental quality parameters for HPLC analysis of six organic acids.

Compound	LOD (mg/L)	LOQ (mg/L)	Linear range (mg/L)	Linearity	Run-to-run precision; (RSD%, )		Day-to-day precision; (RSD%, )
					Retention time	Peak area	Retention time	Peak area
TA	1.0	3.0	3–300	0.999	0.18	7.9	0.47	8.4
MA	1.0	3.0	3–300	0.996	0.22	5.6	0.64	6.7
LA	2.0	5.0	5–500	0.998	0.14	7.0	0.38	9.2
AA	3.0	10	10–1000	0.999	0.14	7.5	0.40	9.3
CA	1.0	3.0	3–300	0.996	0.53	4.0	1.8	7.3
SA	0.1	0.25	0.25–100	0.994	0.47	6.6	1.6	7.9