Table 3. Application of the Recommended Method to Real Water Samples for the Determination of F^–

sample	F– found (mg L–1)	F– added (mg L–1)	F– (spiked + sample water) expected (mg L–1)	F– (spiked + sample water) found (mg L–1)	recovery (%)	RSD (%)
mineral water	0.281	4.166	4.447	4.452	100.1	4.44
		8.333	8.614	8.863	102.9	1.28
		12.500	12.781	12.750	99.8	0.77
		16.666	16.947	16.949	100.0	0.60
artificial wastewater	4.166	4.166	8.332	8.467	101.6	1.39
		8.333	12.499	12.559	100.5	0.21
		12.500	16.666	16.899	101.4	0.92
		16.666	20.832	19.506	93.6	1.15