JEQ -- Zhang et al. 33 (2): 559 Figure IG2

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Fig. 2. A procedure to determine Se species in water samples. Particulate Se(0) = total Se – total soluble Se plus colloidal Se(0); Colloidal Se(0) = total soluble Se plus colloidal Se(0) – total soluble Se; Se(VI) = total soluble Se – Se(IV) plus organic Se; and organic Se = Se(IV) plus organic Se – Se(IV).