Method Development for Assessing Carbamazepine, Caffeine, and Atrazine in Water Sources from the Brazilian Federal District Using UPLC-QTOF/MS

Table 4

Coefficients of variance for intraday analysis of mixed solutions of the analytes.

Concentration	Precision (%)
	Atrazine	Caffeine	Carbamazepine
0.48	1	5	3
2.4	4	2	4
12	3	5	2
60	2	6	5
300	1	6	5

Concentrations in column (μg/L) used the for the construction of analytical curves. Peak areas for six replicates