Cloud Point Extraction for the Determination of Trace Amounts of Cobalt in Water and Food Samples by Flame Atomic Absorption Spectrometry

Table 3

Determination of cobalt in water and millet samples (𝑛=3).

Sample	Added/μg g^−1	*Found value/μg g^−1	Recovery/%
Millet	0	0.07±0.02
	0.05	0.12±0.02	100.0
	0.1	0.17±0.03	100.0
	1.0	1.05±0.03	98.0
River water	0	0.20±0.05
	0.1	0.30±0.05	100.0
	0.2	0.39±0.04	95.0
	1.0	1.16±0.10	96.0

* 𝑋±(𝑡_𝑝,𝑡𝑠/√𝑛), 𝑃=0.95, 𝑓=2.