{"id":2985,"date":"2025-04-24T07:51:31","date_gmt":"2025-04-24T07:51:31","guid":{"rendered":"https:\/\/normalab.misari.fr\/normes\/ip-4\/"},"modified":"2025-05-02T09:43:26","modified_gmt":"2025-05-02T09:43:26","slug":"ip-4","status":"publish","type":"normes","link":"https:\/\/normalab.com\/en\/standards\/ip\/ip-4\/","title":{"rendered":"IP 4"},"content":{"rendered":"<p>This method specifies the determination of the ash content of petroleum products, such as distillate and residual fuel oils, crude petroleum, lubricating oils, waxes and other petroleum products, in which any ash-forming constituents present are normally considered to be undesirable impurities or contaminants. Ash can result from oil-soluble or water-soluble metallic compounds or from extraneous solids such as dirt and rust.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Determination of ash content in petroleum products<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3232,"menu_order":0,"template":"","meta":{"_acf_changed":false},"groupe-norme":[104],"class_list":["post-2985","normes","type-normes","status-publish","hentry","groupe-norme-ip-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>IP 4 - Normalab<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/normalab.com\/en\/standards\/ip\/ip-4\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"IP 4 - Normalab\" \/>\n<meta property=\"og:description\" content=\"Determination of ash content in petroleum products\" \/>\n<meta property=\"og:url\" content=\"https:\/\/normalab.com\/en\/standards\/ip\/ip-4\/\" \/>\n<meta property=\"og:site_name\" content=\"Normalab\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-02T09:43:26+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/normalab.com\/en\/standards\/ip\/ip-4\/\",\"url\":\"https:\/\/normalab.com\/en\/standards\/ip\/ip-4\/\",\"name\":\"IP 4 - 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