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The results should be presented by the mean ¡À SD for the each sample and recovery of each spiked sample in Table 2. Moreover, the difference between the proposed method and HPLC method should be evaluated by mathematical statistics.

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Table 2. The determination of o- and p-DHB in water samples.
Water sample        Added (nM)        Found (nM)        Recovery (%)        By HPLC (nM)
        o-DHB        p-DHB        o-DHB        p-DHB        o-DHB        p-DHB        o-DHB        p-DHB
a        1.00                1.00                1.08                1.03          108.0        103.0        1.01          1.03
b        2.00               2.00           2.11         1.96               105.5        98.0                2.08          1.97
c        4.50           4.50         4.39         4.27         97.6         94.9         4.39                4.25


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