7Zerbe J,Siepak J. Comparison of methods for determination of chemical oxygen demand COD in waste waters[ J ]. Chemia Analityczna,1999,44 (2) :263 - 267.
8Kim Y C, Lee K H, Sasaki S, et al. Photocatalytic sensorfor chemical oxygen demand determination based on oxygen electrode[ J ]. Anal Chem ,2000,72 (14) :3379 - 3382.
9Dan D Z, Dou F L, Xiu D J, et al. Chemical oxygen demand determination in environmental waters by mixed-acid digestion and single sweep polarography[ J]. Analytica Chimica Acta, 2000, 420 ( 1 ):39 - 44.