DIN EN ISO 15181-5-2008 涂料和清漆.防污涂料中生物杀灭剂释放率的测定.第5部分:通过萃取物中二甲基甲苯基硫胺(DMST)和二甲基苯基硫胺(DMSA)浓度的测定计算甲苯氟磺胺和苯氟磺胺的释放率
Paints and varnishes - Determination of release rate of biocides from antifouling paints - Part 5: Calculation of the tolylfluanid and dichlofluanid release rate by determination of the concentration of dimethyltolylsulfamide (DMST) and dimethylphenylsulf
This part of ISO 15181 specifies the apparatus and analytical method for determining the amount of
tolylfluanid and dichlofluanid that has been released from an antifouling paint into artificial seawater in
accordance with the procedure given in ISO 15181-1.
Tolytfluanid and dichlofluanid are unstable in the marine environment and degrade to form
dimethyltolylsulfamide (DMST) and dimethylphenylsulfamide (DMSA), respectively. This part of ISO 15181
specifies a method for converting the released species into these degradation products, quantifying their
concentration in the treated artificial seawater samples, and gives the final calculation for the release rate of
tolylfluanid and dichlofluanid under the specified laboratory conditions.
This part of ISO 15181 is designed to allow the concurrent determination of tolylfluanid, dichlofluanid and
other biocides that can be released by a given antifouling paint (for example, copper) through the analysis of
separate sub-samples of an artificial seawater extract generated in accordance with ISO 15181-1.
When used in conjunction with ISO 15181-1, the practical limits for quantifying release rates by this method
are from 1,3 μg.cm.d to 500 μg.cm.d. The quantitation of release rates lower than this range will
require the use of an analytical method with a lower limit of quantitation for tolylfluanid, dichlofluanid, or both
(as appropriate) in artificial seawater than that specified in Clause 3 and in 5.1.