2,7-Dichlorofluorescein Hydrazide as a New Fluorescent Probe for Mercury Quantification: Application to Industrial Effluents and Polluted Water Samples

Table 2

Determination of mercury from different sample matrices.

Sample	Hg^2+ originally found (ngmL^−1)				Total Hg found (ngmL^−1)			Recovery (%)
	Proposed method	Standard method	F-test values	Hg^2+ added (ngmL^−1)	Proposed method	Standard method	F-test values	Proposed method	Standard method
(1) Chrome plating industry effluent	18 ± 1.6	18 ± 1.6	1.3	1.0	19 ± 1.1	18.5 ± 1.1	1.00	100	97.3
(2) Textile industry effluent	10 ± 1.2	10 ± 2.4	2.0	1.0	10.9 ± 1.9	12 ± 1.6	1.18	99.0	109
(3) Lake water	ND	ND	—	10.0	9.9 ± 1.9	9.9 ± 1.9	1.00	99.5	99.5
(4) Tap water	ND	ND	—	15.0	14.9 ± 1.7	14.9 ± 1.6	1.06	99.6	99.6
(5) Polluted lake water	10.1 ± 1.5	10.2 ± 1.9	1.26	1.00	10.9 ± 1.6	11 ± 1.2	1.30	99.0	100
(6) Soil sludge*	0.5 ± 0.01	0.5 ± 0.014	1.4	1.00	1.5 ± 0.05	1.5 ± 0.05	1.00	100	100
(7) Agricultural soil*	ND	ND	—	10.0	10.0 ± 1.2	10 ± 1.9	1.58	100	100

ND: not detected (𝑛=5, the values indicated here are average of five measurements).
* ngg⁻¹.