{"id":3122,"date":"2026-08-06T15:24:28","date_gmt":"2026-08-06T13:24:28","guid":{"rendered":"https:\/\/gekkophotonics.com\/?post_type=case-study&p=3122"},"modified":"2026-08-06T15:46:15","modified_gmt":"2026-08-06T13:46:15","slug":"kontrola-stezenia-mocznika-w-adblue-def-iso-22241-32-5","status":"publish","type":"case-study","link":"https:\/\/gekkophotonics.com\/en\/case-study\/kontrola-stezenia-mocznika-w-adblue-def-iso-22241-32-5\/","title":{"rendered":"Control of urea concentration in AdBlue\/DEF (ISO 22241, 32.5%)"},"content":{"rendered":"
\n
\n
Industry<\/dt>\n
AdBlue \/ DEF Production<\/dd>\n<\/div>\n
\n
Scope<\/dt>\n
Verification of urea concentration per ISO 22241 at filling<\/dd>\n<\/div>\n<\/dl>\n

Client context<\/h2>\n

AdBlue (AUS 32) is a solution of 32.5% urea in deionized water, used in SCR systems of Euro VI diesel engines to reduce nitrogen oxides. Urea concentration is a critical parameter: too low or too high reduces SCR efficiency and may create producer liability.<\/p>\n

ISO 22241 requires verification of concentration, biuret, and absence of contaminants for each batch, and homogeneity in a tanker or IBC is critical in high-volume production.<\/p>\n

Challenge.<\/h2>\n
    \n
  • Urea concentration must fall within a narrow window of 32.5% \u00b10.7% (ISO 22241).<\/li>\n
  • Refractometry is fast but measures only dry matter and does not distinguish biuret.<\/li>\n
  • Full quality control awaits the laboratory, which slows down filling.<\/li>\n
  • Euro VI type approval (Reg. 2017\/2400) makes AdBlue quality a formal requirement.<\/li>\n<\/ul>\n

    Solution<\/h2>\n

    Spectrally\u2122 X1 verifies urea concentration and solution homogeneity inline, directly at the filling point. It provides rapid qualitative and quantitative composition control without waiting for the laboratory.<\/p>\n

    We honestly note the method limitation: Raman confirms composition (urea, biuret) but does not replace trace metal determination (Fe, Ca, Na), which requires methods such as ICP or AAS. This is a complement to rapid control, not a substitute for full ISO 22241 certification.<\/p>\n

    Results<\/h2>\n
    \n\n\n\n\n\n\n\n
    Metric<\/th>\nResult<\/th>\n<\/tr>\n<\/thead>\n
    Parameter<\/td>\nUrea concentration and solution homogeneity, verification of the 32.5% \u00b10.7% window<\/td>\n<\/tr>\n
    Time<\/td>\nVerification at filling instead of waiting for the laboratory<\/td>\n<\/tr>\n
    Method limitations<\/td>\nRaman does not replace trace metal determination (Fe, Ca, Na) by methods such as ICP or AAS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    What this means for your process<\/h2>\n

    If you produce or package AdBlue\/DEF, inline measurement allows you to confirm the ISO 22241 concentration window and batch homogeneity at filling, reducing the risk of off-spec batches and producer liability.<\/p>\n

    The most reliable path to verification is a short feasibility study on real samples.<\/p>","protected":false},"excerpt":{"rendered":"

    AdBlue must meet a concentration of 32.5% \u00b10.7% per ISO 22241; deviation destroys the SCR system. We demonstrate how to verify urea concentration and solution homogeneity inline, during filling, without waiting for laboratory results.<\/p>","protected":false},"author":1,"featured_media":3141,"menu_order":0,"comment_status":"closed","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","industry-grid":""},"class_list":["post-3122","case-study","type-case-study","status-publish","format-standard","has-post-thumbnail","hentry"],"blocksy_meta":[],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/case-study\/3122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/case-study"}],"about":[{"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/types\/case-study"}],"author":[{"embeddable":true,"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/comments?post=3122"}],"version-history":[{"count":3,"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/case-study\/3122\/revisions"}],"predecessor-version":[{"id":3166,"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/case-study\/3122\/revisions\/3166"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/media\/3141"}],"wp:attachment":[{"href":"https:\/\/gekkophotonics.com\/en\/wp-json\/wp\/v2\/media?parent=3122"}],"curies":[{"name":"entry","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}