Extraction and Analysis of Strontium in Water Sample Using a Sr²⁺ Selective Polymer as the Absorbent Phase

Table 2

Experimental recoveries of Sr²⁺ in four water samples.

Water samples	Concentration	Added amount	Recoveries
	(μg/L)	(μg/L)	(%)
Underground water	78.2	100	102.3
Tap water	55.8	100	97.7
River water (point 1)	158.4	100	103.9
River water (point 2)	139.6	100	96.4