{"id":3272,"date":"2024-08-02T10:22:33","date_gmt":"2024-08-02T07:22:33","guid":{"rendered":"https:\/\/bilim.gen.tr\/cosmetic-personal-care-product-testing\/kozmetik-urunlerde-koruyucu-etkinlik-challenge-testi\/"},"modified":"2026-08-13T10:46:35","modified_gmt":"2026-08-13T07:46:35","slug":"preservative-efficacy-challenge-test","status":"publish","type":"page","link":"https:\/\/bilim.gen.tr\/en\/cosmetic-personal-care-product-testing\/preservative-efficacy-challenge-test\/","title":{"rendered":"Preservative Efficacy (Challenge) Test"},"content":{"rendered":"<p>The <b>Preservative Efficacy Test (Challenge Test)<\/b> is performed to evaluate the effectiveness of preservatives used in cosmetic products, personal care products, household care products, and raw materials in maintaining microbiological stability before opening and throughout normal consumer use. This test assesses whether the preservative system is capable of protecting the product against microbiological contamination and deterioration before the original packaging is opened and during its intended period of use.<\/p>\n<p>The <b>Challenge Test<\/b> is based on the artificial contamination of the product under laboratory conditions and the evaluation of the resulting microbiological data.<\/p>\n<p>The test result is determined by the logarithmic evaluation of the microbial counts in the artificially contaminated product at specified time intervals, such as <b>Day 2, Day 7, Day 14, and Day 28<\/b>.<\/p>\n<p>The test is initiated by inoculating the product under laboratory conditions with reference strains of the following microorganisms in accordance with the applicable reference methods:<\/p>\n<ul>\n<li><i>Pseudomonas aeruginosa<\/i> ATCC\u00ae 9027<\/li>\n<li><i>Staphylococcus aureus<\/i> ATCC\u00ae 6538<\/li>\n<li><i>Escherichia coli<\/i> ATCC\u00ae 8739<\/li>\n<li><i>Candida albicans<\/i> ATCC\u00ae 10231<\/li>\n<li><i>Aspergillus brasiliensis<\/i> ATCC\u00ae 16404<\/li>\n<\/ul>\n<p>The test duration is <b>28 days<\/b>. In our laboratory, all procedures and test parameters are performed in accordance with the <b>ISO\/IEC 17025<\/b> standard.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Preservative Efficacy Test (Challenge Test) is performed to evaluate the effectiveness of preservatives used in cosmetic products, personal care products, household care products, and raw materials in maintaining microbiological stability before opening and throughout normal consumer use. This test assesses whether the preservative system is capable of protecting the product against microbiological contamination and [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":3039,"parent":3258,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-hizmetler-page.php","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-3272","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Preservative Efficacy (Challenge) Test - Bilim Laboratuvarlar\u0131<\/title>\n<meta name=\"description\" content=\"Koruyucu Etkinlik Testi ile kozmetik \u00fcr\u00fcnlerde kullan\u0131lan koruyucular\u0131n mikrobiyal etkisi \u00f6l\u00e7\u00fcl\u00fcr; g\u00fcvenli raf \u00f6mr\u00fc ve yasal uyum sa\u011flan\u0131r.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bilim.gen.tr\/en\/cosmetic-personal-care-product-testing\/preservative-efficacy-challenge-test\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Preservative Efficacy (Challenge) Test - Bilim Laboratuvarlar\u0131\" \/>\n<meta property=\"og:description\" content=\"Koruyucu Etkinlik Testi ile kozmetik \u00fcr\u00fcnlerde kullan\u0131lan koruyucular\u0131n mikrobiyal etkisi \u00f6l\u00e7\u00fcl\u00fcr; 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