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Journal of Chemistry
/
2013
/
Article
/
Tab 4
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Research Article
2-Hydroxy-1-naphthaldehyde-P-hydroxybenzoichydrazone: A New Chromogenic Reagent for the Determination of Thorium(IV) and Uranium(VI)
Table 4
Determination of thorium in environmental water samples.
Amount of thorium (
μ
g mL
−1
) ± SD
Sample
(
)
Added
Found
Recovery %
Tap water
1.5
103.30
Bore-well water
2.0
109.50
Stream water
4.5
98.60
Domestic sewage water
3.5
103.42