{"id":4524,"date":"2026-09-25T13:48:40","date_gmt":"2026-09-25T13:48:40","guid":{"rendered":"https:\/\/nano-test.de\/?p=4524"},"modified":"2026-09-25T13:51:45","modified_gmt":"2026-09-25T13:51:45","slug":"bestimmung-des-ph-werts-in-waschmitteln-und-seifen","status":"publish","type":"post","link":"https:\/\/nano-test.de\/en\/2026\/09\/25\/bestimmung-des-ph-werts-in-waschmitteln-und-seifen\/","title":{"rendered":"Determination of pH in detergents and soaps"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"4524\" class=\"elementor elementor-4524\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3ae676cc ts-col-stretched-none ts-bg-color-over-image elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3ae676cc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-315e02b1 ts-bg-color-over-image\" data-id=\"315e02b1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3aa4e8fc elementor-widget elementor-widget-text-editor\" data-id=\"3aa4e8fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><span style=\"color: #000000;\">Determination of the pH in detergents and soaps (10 percent solution): Guide according to ASTM D1172 and ISO 4316<\/span><\/h2><p><span style=\"color: #000000;\">The pH value of detergents and soaps is a decisive quality parameter in terms of product performance and skin compatibility. The pH value of a detergent has a direct influence on the formation of foam, the dirt-dissolving power, the effect on textiles or surfaces and the compatibility with the skin of the consumer. Therefore, the pH determination of detergents and soaps is an indispensable part of routine quality control.<\/span><\/p><p><span style=\"color: #000000;\">Gem\u00e4\u00df internationalen Standards wird der pH-Wert von Waschmitteln und Seifen in der Regel anhand einer <strong>10-prozentigen w\u00e4ssrigen L\u00f6sung<\/strong> (10 g Probe \/ 100 ml Wasser) gemessen. Diese Konzentration entspricht den typischen Anwendungsbedingungen des Produkts und gew\u00e4hrleistet vergleichbare Ergebnisse zwischen verschiedenen Produkten. In diesem Artikel werden wir erl\u00e4utern, wie die pH-Bestimmung mit einer 10-prozentigen L\u00f6sung durchgef\u00fchrt wird, welche Normen dabei gelten und welche Dienstleistungen Nano-Test in diesem Bereich anbietet.<\/span><\/p><p><span style=\"color: #000000;\"><!-- H2-&#220;berschrift --><\/span><\/p><h2><span style=\"color: #000000;\">Why is a 10 percent solution used?<\/span><\/h2><p><span style=\"color: #000000;\">Detergent and soaps can be concentrated or viscous in their pure form so that pH measurement is not possible. In addition, the pH of the product may change when diluted (especially with low buffering capacity formulations). Therefore, the norms stipulate that the measurement is carried out at a certain dilution ratio.<\/span><\/p><p><span style=\"color: #000000;\"><strong>Eine 10-prozentige L\u00f6sung<\/strong> ist die in der Branche am weitesten verbreitete Referenzkonzentration. Dieses Verh\u00e4ltnis bietet sowohl ein Szenario, das der praktischen Anwendung des Produkts nahekommt, als auch eine verbesserte Reproduzierbarkeit zwischen verschiedenen Laboren. Insbesondere bei Seifen k\u00f6nnen bei hohen Konzentrationen Probleme wie eine erh\u00f6hte Viskosit\u00e4t und das Verstopfen der Elektroden auftreten, weshalb eine 10-prozentige Verd\u00fcnnung optimale Messbedingungen gew\u00e4hrleistet.<\/span><\/p><p><span style=\"color: #000000;\"><!-- H2-&#220;berschrift --><\/span><\/p><h2><span style=\"color: #000000;\">Relevant International Norms<\/span><\/h2><p><span style=\"color: #000000;\">The most important standards used as a reference for pH determination in detergents and soaps are as follows:<\/span><\/p><p><span style=\"color: #000000;\"><!-- Tabellenanfang --><\/span><\/p><table><thead><tr><th><span style=\"color: #000000;\">Standard<\/span><\/th><th><span style=\"color: #000000;\">Title<\/span><\/th><th><span style=\"color: #000000;\">Scope<\/span><\/th><\/tr><\/thead><tbody><tr><td><span style=\"color: #000000;\"><strong>ASTM D1172<\/strong><\/span><\/td><td><span style=\"color: #000000;\">Standard Guide for PH of Queous Solutions of Soaps and Detergents<\/span><\/td><td><span style=\"color: #000000;\">Standard Guide to the Preparation and PH Determination of Aqueous Solutions of Soaps and Detergents<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>ISO 4316<\/strong><\/span><\/td><td><span style=\"color: #000000;\">Surfactants - Determination of the pH of aqueous solutions - Potentiometric method<\/span><\/td><td><span style=\"color: #000000;\">Determination of the pH of aqueous surfactant solutions by potentiometric method<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>TS 6365 EN 1262<\/strong><\/span><\/td><td><span style=\"color: #000000;\">Surfactants \u2013 pH determination<\/span><\/td><td><span style=\"color: #000000;\">Turkish standard for pH determination in surfactants<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>GB\/T 13531.1<\/strong><\/span><\/td><td><span style=\"color: #000000;\">pH determination in cosmetics\/detergents<\/span><\/td><td><span style=\"color: #000000;\">Chinese standard for pH determination in cosmetics and detergents<\/span><\/td><\/tr><\/tbody><\/table><p><span style=\"color: #000000;\"><!-- Ende der Tabelle --><\/span><\/p><p><span style=\"color: #000000;\">ASTM D1172 describes in detail the preparation methods for soaps and detergents, while ISO 4316 defines the framework for the potentiometric method applicable to all products with surfactants.<\/span><\/p><p><span style=\"color: #000000;\"><!-- H2-&#220;berschrift --><\/span><\/p><h2><span style=\"color: #000000;\">Method for pH determination with a 10 percent solution<\/span><\/h2><p><span style=\"color: #000000;\">The procedure carried out in accordance with ASTM D1172 and ISO 4316 includes the following steps:<\/span><\/p><p><span style=\"color: #000000;\"><!-- H3-Unter&#252;berschrift --><\/span><\/p><h3><span style=\"color: #000000;\">1. Sample Preparation and Production of the Solution<\/span><\/h3><ul><li><span style=\"color: #000000;\"><strong>Abwiegen:<\/strong> Auf einer Analysenwaage werden 10 \u00b1 0,05 g der Probe abgewogen.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Aufl\u00f6sen:<\/strong> Die Probe wird in einen 100-ml-Erlenmeyerkolben \u00fcberf\u00fchrt und mit ca. 60\u201370 ml <strong>kohlendioxidfreiem reinem Wasser<\/strong> aufgef\u00fcllt.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Mischen:<\/strong> Die Probe wird auf einem Magnetr\u00fchrer oder in einem Ultraschallbad gemischt, bis sie vollst\u00e4ndig aufgel\u00f6st ist. Falls erforderlich, kann eine leichte Erw\u00e4rmung (maximal 40 \u00b0C) erfolgen.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Auff\u00fcllen:<\/strong> Nachdem die L\u00f6sung auf Raumtemperatur abgek\u00fchlt ist, wird sie mit reinem Wasser auf 100 mL aufgef\u00fcllt.<\/span><\/li><\/ul><div class=\"note\"><span style=\"color: #000000;\"><strong>Wichtig:<\/strong> Die Leitf\u00e4higkeit des verwendeten Wassers muss unter 2 \u00b5S\/cm liegen und es darf kein CO\u2082 enthalten. Andernfalls k\u00f6nnen die Messergebnisse fehlerhaft sein.<\/span><\/div><p><span style=\"color: #000000;\"><!-- H3-Unter&#252;berschrift --><\/span><\/p><h3><span style=\"color: #000000;\">2. Calibration of the pH meter<\/span><\/h3><ul><li><span style=\"color: #000000;\">The pH meter is calibrated with at least two-point calibration before measurement.<\/span><\/li><li><span style=\"color: #000000;\">F\u00fcr die Kalibrierung werden in der Regel <strong>pH-4,00-, 7,00- und 10,00-<\/strong> Pufferl\u00f6sungen verwendet.<\/span><\/li><li><span style=\"color: #000000;\">Calibration must be done at measuring temperature (usually 25 \u00b1 1 \u00b0C).<\/span><\/li><li><span style=\"color: #000000;\">The glass electrode is rinsed with pure water before and after calibration and slightly dabbed (not rubbed) with blotting paper.<\/span><\/li><\/ul><p><span style=\"color: #000000;\"><!-- H3-Unter&#252;berschrift --><\/span><\/p><h3><span style=\"color: #000000;\">3. Measurement<\/span><\/h3><ul><li><span style=\"color: #000000;\">The 10 percent solution produced is transferred to a clean beaker.<\/span><\/li><li><span style=\"color: #000000;\">The pH electrode is immersed in the solution and gently stirred with a magnetic stirrer.<\/span><\/li><li><span style=\"color: #000000;\">You wait until the value has stabilized (usually 30-60 seconds).<\/span><\/li><li><span style=\"color: #000000;\">The result is recorded with an accuracy of 0.1 pH units.<\/span><\/li><li><span style=\"color: #000000;\">The measurement is repeated at least twice and the mean of the results is formed.<\/span><\/li><\/ul><p><span style=\"color: #000000;\"><!-- H3-Unter&#252;berschrift --><\/span><\/p><h3><span style=\"color: #000000;\">4. Temperature Correction<\/span><\/h3><p><span style=\"color: #000000;\">Die pH-Messung ist temperaturabh\u00e4ngig. ASTM D1172 und ISO 4316 empfehlen, die Messung bei <strong>25 \u00b1 1 \u00b0C<\/strong> durchzuf\u00fchren. Bei Verwendung von pH-Messger\u00e4ten mit automatischer Temperaturkompensation (ATC) wird die Temperaturdifferenz automatisch korrigiert.<\/span><\/p><p><span style=\"color: #000000;\"><!-- H2-&#220;berschrift --><\/span><\/p><h2><span style=\"color: #000000;\">Expected pH ranges depending on product type<\/span><\/h2><p><span style=\"color: #000000;\">The pH values of detergents and soaps vary depending on the intended use:<\/span><\/p><p><span style=\"color: #000000;\"><!-- Tabellenanfang --><\/span><\/p><table><thead><tr><th><span style=\"color: #000000;\">Product type<\/span><\/th><th><span style=\"color: #000000;\">Typical pH range (10% solution)<\/span><\/th><th><span style=\"color: #000000;\">Scope of application<\/span><\/th><\/tr><\/thead><tbody><tr><td><span style=\"color: #000000;\"><strong>Solid Soap (Classic)<\/strong><\/span><\/td><td><span style=\"color: #000000;\">9,0 \u2013 10,5<\/span><\/td><td><span style=\"color: #000000;\">Hand and Body Cleaning<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>Liquid soap<\/strong><\/span><\/td><td><span style=\"color: #000000;\">5,5 \u2013 8,5<\/span><\/td><td><span style=\"color: #000000;\">Hand cleansing, for sensitive skin<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>Shampoo (baby)<\/strong><\/span><\/td><td><span style=\"color: #000000;\">5,5 \u2013 7,0<\/span><\/td><td><span style=\"color: #000000;\">Eye-friendly, gentle formula<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>Detergent<\/strong><\/span><\/td><td><span style=\"color: #000000;\">9,0 \u2013 11,0<\/span><\/td><td><span style=\"color: #000000;\">Textile cleaning, dirt solution<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>Dishwashing liquid<\/strong><\/span><\/td><td><span style=\"color: #000000;\">7,0 \u2013 9,0<\/span><\/td><td><span style=\"color: #000000;\">Fat solution, contact with hands<\/span><\/td><\/tr><tr><td><span style=\"color: #000000;\"><strong>Surface cleaner<\/strong><\/span><\/td><td><span style=\"color: #000000;\">10,0 \u2013 12,0<\/span><\/td><td><span style=\"color: #000000;\">Industrial cleaning, disinfection<\/span><\/td><\/tr><\/tbody><\/table><p><span style=\"color: #000000;\"><!-- Ende der Tabelle --> <!-- H2-&#220;berschrift: Nano-Test --><\/span><\/p><h2><span style=\"color: #000000;\">GLP compliant pH determination services with nano test<\/span><\/h2><p><span style=\"color: #000000;\">Die pH-Bestimmung bildet f\u00fcr Hersteller von Reinigungsmitteln und Seifen die Grundlage sowohl f\u00fcr die Produktqualit\u00e4t als auch f\u00fcr die Einhaltung gesetzlicher Vorschriften. <strong>Nano-Test<\/strong> is a reliable solution partner for the cleaning agent industry with its GLP-compliant analysis services in this area.<\/span><\/p><div class=\"highlight\"><h3><span style=\"color: #000000;\">Description of Nano-Test Services<\/span><\/h3><p><span style=\"color: #000000;\">Nano-Test bietet f\u00fcr Wasch- und Seifenprodukte den <strong>pH-Bestimmungsdienst mit einer 10-prozentigen L\u00f6sung<\/strong> an. Unsere Analysen werden in voller \u00dcbereinstimmung mit den Normen ASTM D1172, ISO 4316 und TS 6365 EN 1262 durchgef\u00fchrt.<\/span><\/p><p><span style=\"color: #000000;\">Our service process:<\/span><\/p><ul><li><span style=\"color: #000000;\"><strong>Sample Preparation:<\/strong> Abwiegen, Aufl\u00f6sen und Verd\u00fcnnen gem\u00e4\u00df ASTM D1172.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Potentiometric Measurement:<\/strong> Messung mit hochpr\u00e4zisen pH-Messger\u00e4ten und kalibrierten Elektroden.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Kalibrierung:<\/strong> Zwei- oder Dreipunktkalibrierung mit zertifizierten Pufferl\u00f6sungen.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Temperaturkontrolle:<\/strong> Messung bei 25 \u00b1 1 \u00b0C, automatische Temperaturkompensation.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Berichterstellung:<\/strong> Die Messergebnisse werden zusammen mit Standardabweichungs- und Wiederholbarkeitsdaten bereitgestellt.<\/span><\/li><\/ul><p><span style=\"color: #000000;\">Alle unsere Analysen werden als <strong>GLP-konforme Berichte<\/strong> vorgelegt, die \u00fcber eine Pr\u00fcfgenehmigung verf\u00fcgen und bei denen die Datenintegrit\u00e4t (ALCOA+-Prinzipien) gew\u00e4hrleistet ist.<\/span><\/p><\/div><h3><span style=\"color: #000000;\">Advantages of the Nano-Test pH determination service:<\/span><\/h3><ul><li><span style=\"color: #000000;\"><strong>Accredited infrastructure:<\/strong> International anerkannte Pr\u00fcfberichte mit ISO\/IEC 17025-Akkreditierung.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Standard compliance:<\/strong> Vollst\u00e4ndige Konformit\u00e4t mit ASTM D1172, ISO 4316 und den entsprechenden nationalen Normen.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Schnelle Ergebnisse:<\/strong> Berichterstellung innerhalb von 2\u20133 Werktagen bei Standard-pH-Analysen.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Umfassender Umfang:<\/strong> Alle Produkttypen, einschlie\u00dflich fester Seife, Fl\u00fcssigseife, Shampoo, Waschmittel und Oberfl\u00e4chenreiniger.<\/span><\/li><li><span style=\"color: #000000;\"><strong>Fachkundiges Team:<\/strong> Ein Team mit Erfahrung in analytischer Chemie und den gesetzlichen Vorschriften f\u00fcr Reinigungsprodukte.<\/span><\/li><\/ul><div class=\"note\"><span style=\"color: #000000;\"><strong>Note:<\/strong> Die pH-Bestimmung allein reicht f\u00fcr die Qualit\u00e4tskontrolle von Wasch- und Seifenprodukten nicht aus. Nano-Test bietet neben der pH-Analyse auch weitere Qualit\u00e4tsparameter wie Wirkstoffbestimmung, Viskosit\u00e4t, Schaumh\u00f6he, Feuchtigkeitsgehalt und mikrobiologische Untersuchungen an.<\/span><\/div><p><span style=\"color: #000000;\"><!-- H2-&#220;berschrift: Ergebnis --><\/span><\/p><p><span style=\"color: #000000;\">The pH determination of detergents and cleaning agents is a decisive step of quality control for the performance, stability and skin compatibility of the product. Potentiometric measurement with a 10 percent solution delivers internationally recognized, reliable results when performed in accordance with ASTM D1172 and ISO 4316 standards.<\/span><\/p><p><span style=\"color: #000000;\">With its accredited laboratory infrastructure, its specialist staff and its GLP-compliant processes, NANO-TEST comprehensively meets the requirements of detergent and soap manufacturers for pH determination. Collaborate with Nano-Test to increase the quality of your products and accelerate their market launch.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Bestimmung des pH-Werts in Waschmitteln und Seifen (10-prozentige L\u00f6sung): Leitfaden gem\u00e4\u00df ASTM D1172 und ISO 4316 Der pH-Wert von Waschmitteln und Seifen ist sowohl hinsichtlich der Produktleistung als auch der Hautvertr\u00e4glichkeit ein entscheidender Qualit\u00e4tsparameter. Der pH-Wert eines Reinigungsmittels hat direkten Einfluss auf die Schaumbildung, die Schmutzl\u00f6sekraft, die Wirkung auf Textilien oder Oberfl\u00e4chen sowie die Vertr\u00e4glichkeit \u2026 <a href=\"https:\/\/nano-test.de\/en\/2026\/09\/25\/bestimmung-des-ph-werts-in-waschmitteln-und-seifen\/\" class=\"more-link\" title=\"Continue reading &amp;lt;span class=\" screen-reader-text>Bestimmung des pH-Werts In Waschmitteln und Seifen\u201c&gt;Continue reading <span class=\"screen-reader-text\">Determination of pH in detergents and soaps<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":4526,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-4524","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kozmetik-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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