Miniaturized Fluorimetric Method for Quantification of Zinc in Dry Dog Food

Table 1

Accuracy and precision using the conditions established for the analysis of Zn(II) in pet food.

	Intraday		Interday
[Zn(II)] (μg L^−1)	Back-calculated concentration (%)	RSD (%)	Back-calculated concentration (%)	RSD (%)
10	100.2	11.7	107.1	9.2
100	96.1	2.0	95.0	1.7
200	98.7	1.0	96.4	3.4