Determination of Iodate in Food, Environmental, and Biological Samples after Solid-Phase Extraction with Ni-Al-Zr Ternary Layered Double Hydroxide as a Nanosorbent

Table 3

Determination of iodate in different real samples (results of recoveries of spiked samples).

Samples	Added IO3− (μg g^−1)	Found IO3−^a (μg g^−1)	Recovery (%)
Table salt (1)^b	—	3.6±0.8	—
	10.0	13.3±0.8	97.0
Table salt (2)^c	—	5.2±0.9	—
	10.0	14.8±0.6	96.0
Table salt (3)^d	—	3.3±0.5	—
	10.0	12.7±0.8	94.0
Rock salt^e	—	1.7±0.3	—
	10.0	11.5±0.2	98.0
Milk powder^f	—	2.5±0.4	—
	10.0	12.2±0.7	97.0
Samples	Added IO3− (μg mL^−1)	Found IO3−^a (μg mL^−1)	Recovery (%)
Seawater^g	—	0.1±0.4	—
	0.1	0.2±0.6	100.0
Urine^h	—	0.1±0.1	—
	1.0	1.1±0.1	100.0

^aMean of three experiments ± standard deviation.
^bObtained from Ehteram Co. table salt, Khoy, Iran.
^cObtained from Rahnema Co. table salt, Tabriz, Iran.
^dObtained from Ghohar Dane Co. table salt, Sanandaj, Iran.
^eMineral salt, Urmia, Iran.
^fObtained from the local pharmacy (Humana Co. milk powder).
^gCollected from Caspian Sea, Nowshahr, Iran.
^hHealthy human urine, 25 years old man.