In the dissolved organic halogen (DOX) analytic test, prior to combustion, the granular activated carbon (GAC) on which the DOX is absorbed is washed with a sodium nitrate solution designed to remove any inorganic chloride that may have also adsorbed to the GAC. Thus, a potential positive interference is removed. This study investigated the effectiveness of the nitrate wash in eliminating possible interferences from bromide, bromate, and chlorate ions. No interference was detected from bromate or chlorate ion, but a small positive interference of about 12 micrograms Cl-/L per mg/L of bromide ion was found in the presence of background organic matter.

中文翻译：

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技术说明：Br-，BrO3-和ClO3-对DOX测定的干扰。

在溶解的有机卤素（DOX）分析测试中，燃烧前，将吸附有DOX的颗粒状活性炭（GAC）用硝酸钠溶液洗涤，该溶液用于去除可能也已吸附到GAC上的任何无机氯化物。因此，消除了潜在的正干扰。这项研究调查了硝酸盐洗涤在消除可能来自溴离子，溴酸根和氯酸根离子的干扰方面的有效性。没有检测到来自溴酸根或氯酸根离子的干扰，但是在存在背景有机物的情况下，发现每mg / L溴离子约有12微克Cl- / L的少量正干扰。