Spectroscopic Determination of Fluoride Using Eriochrome Black T (EBT) as a Spectrophotometric Reagent from Groundwater

Table 2

Analytical results of groundwater sample analysis via spiking (n = 3).

Sample type	Fluoride standard spiked (mg/L)	This method, F^− found (mg/L) in sample waters after dilution^a	Fluoride found (spiked + sample water)^b	% Recovery	RSD, %
GW-1	0.25	2.50	2.70	98.18	3.20
GW-1	0.5	2.50	3.06	111.40	6.20
GW-1	1.5	2.50	2.86	110.60	4.50

^aFluoride found in groundwater after 7-fold dilution. ^bTotal fluoride in 7-fold-diluted groundwater plus spiked standard.