Micelle Mediated Trace Level Sulfide Quantification through Cloud Point Extraction

Table 3

Determination of dissolved sulfide from leachate samples.

Sample	Sulfide found (ppm)		Sulfide added (ppm)	Total sulfide (ppm)		Recovery of added sulfide (%)
	Proposed method	Standard method		Proposed method	Standard method	Proposed method	Standard method
A*	2.81±0.37	2.88±0.12	—	—	—	—	—
B*	1.94±0.28	1.90±0.15	1.0	2.86±0.22	2.91±0.09	99.31	102.34
C*	1.03±0.21	1.05±0.12	2.0	3.00±0.18	3.08±0.10	99.00	102.98
D*	ND	ND	1.0	1.03±0.20	1.02±0.09	103.00	102.00
D**	ND	ND	1.0	1.09±0.18	1.02±0.11	109.00	102.00

Values given here are the average of three measurements ± RSD.
ND- not detected.
*Sulfide determined by aqueous procedure.
**Sulfide determined by cloud point extraction procedure.