{"id":3026,"date":"2026-10-03T16:08:47","date_gmt":"2026-10-03T16:08:47","guid":{"rendered":"https:\/\/nhdbio.com\/?p=3026"},"modified":"2026-10-15T03:53:29","modified_gmt":"2026-10-15T03:53:29","slug":"peptid-coa-nicht-nachgewiesen-nachweis-und-quantifizierungsgrenzen","status":"publish","type":"post","link":"https:\/\/nhdbio.com\/de\/peptide-coa-not-detected-detection-quantitation-limits\/","title":{"rendered":"\u201cNicht nachgewiesen\u201d ist nicht null: Nachweis- und Bestimmungsgrenzen richtig lesen"},"content":{"rendered":"<p>A report says \u201cnot detected.\u201d Can you write that the sample contains none of that substance? Not quite. Every method has a limit to what it can see and measure. The report needs to tell you that limit.<\/p>\n<h2>Etwas sehen und es genau messen sind zwei verschiedene Dinge<\/h2>\n<p>Die Nachweisgrenze betrifft die Frage, ob ein Stoff in geringer Konzentration mit der Methode identifiziert werden kann. Die Bestimmungsgrenze betrifft die Frage, ob seine Menge mit geeigneter Leistung gemessen werden kann. Ein schwaches Signal kann erkennbar sein, bevor seine Menge zuverl\u00e4ssig ist.<\/p>\n<p>Eine Berichtsgrenze kann durch das Verfahren separat definiert werden. Frage, welche Grenze der Bericht tats\u00e4chlich verwendet.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t17\/en\/1.png\" alt=\"Figure 1. Detection and quantitation are different questions.\"><figcaption>Abbildung 1. Nachweis und zuverl\u00e4ssige Mengenmessung beantworten unterschiedliche Fragen.<\/figcaption><\/figure>\n<h2>Folge einem Beispiel von niedrig bis hoch<\/h2>\n<p>In this teaching example, the detection limit is about 0.2 \u00b5g\/g and the quantitation limit is 0.6 \u00b5g\/g. Below the detection capability, presence cannot be reliably established by these rules.<\/p>\n<p>\u00dcber dem Nachweis, aber unterhalb von 0.6, kann es Hinweise auf ein Vorhandensein geben, ohne eine zuverl\u00e4ssige numerische Menge. Im etablierten quantitativen Bereich kann die Methode ein Mengenergebnis st\u00fctzen.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t17\/en\/2.png\" alt=\"Figure 2. Illustrative thresholds: below detection, detected below quantitation, and within a supported quantitative range.\"><figcaption>Figure 2. Example detection and quantitation limits of 0.2 and 0.6 \u00b5g\/g.<\/figcaption><\/figure>\n<h2>Erf\u00fcllt dieser Grenzwert Ihre Anforderungen?<\/h2>\n<p>Suppose you require less than 0.1 \u00b5g\/g, but the result only supports less than 0.2 \u00b5g\/g. It does not settle whether the sample meets the stricter requirement.<\/p>\n<p>Beide Zahlen k\u00f6nnen klein erscheinen. Der Unterschied zwischen ihnen ist dennoch relevant. Vergleichen Sie dieselbe Substanz, dieselben Einheiten und dieselbe Probenbasis.<\/p>\n<h2>A blank box is not \u201cnot detected\u201d<\/h2>\n<p>A blank field may mean no result was supplied. \u201cNot tested\u201d means the test was not performed. \u201cNot detected\u201d describes an outcome under a method\u2019s reporting rules. None automatically means an exact zero.<\/p>\n<p>Ein angezeigter 0.000 kann auch gerundet oder weiterverarbeitet worden sein. Fragen Sie nach, wie er entstanden ist, bevor Sie ihn als exakten Wert behandeln.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/nhdbio.com\/wp-content\/plugins\/nhd-content-refresh\/teaching-images\/t17\/en\/3.png\" alt=\"Figure 3. Report ND with the method, unit and reporting threshold.\"><figcaption>Figure 3. Read \u201cnot detected\u201d together with the method, unit and reporting limit.<\/figcaption><\/figure>\n<h2>Stelle eine vollst\u00e4ndige Frage<\/h2>\n<p>Frage: Welche Substanz wurde gepr\u00fcft, mit welcher Methode, in welchen Einheiten und mit welcher Nachweisgrenze? Endotoxin- und Restl\u00f6semittelpr\u00fcfungen untersuchen zum Beispiel unterschiedliche Substanzen.<\/p>\n<div class=\"exercise\"><strong>A report states less than 1 \u00b5g\/g. Does that establish less than 0.5 \u00b5g\/g?<\/strong><\/p>\n<details>\n<summary>Antwort ansehen<\/summary>\n<p>No. The range from 0.5 to 1 \u00b5g\/g has not been excluded.<\/p>\n<\/details>\n<\/div>\n<h2>Ergebnisse f\u00fcr LL-37 oder GHK-Cu anfordern<\/h2>\n<p>F\u00fcr LL-37 oder GHK-Cu nenne die Substanz, die gemessen werden soll, und die ben\u00f6tigte Nachweisf\u00e4higkeit. Best\u00e4tige, welche Tests tats\u00e4chlich durchgef\u00fchrt wurden. HPLC-Reinheit liefert kein Endotoxin-Ergebnis.<\/p>\n<p><a href=\"https:\/\/nhdbio.com\/de\/produkte\/ll-37\/\">LL-37<\/a> \/ <a href=\"https:\/\/nhdbio.com\/de\/produkte\/ghk-cu\/\">GHK-Cu<\/a><\/p>\n<p><a href=\"https:\/\/nhdbio.com\/de\/zitat\/\">Besprechen Sie Material- und Dokumentanforderungen mit NHD<\/a> \u00b7 <a href=\"https:\/\/nhdbio.com\/de\/analysemethoden\/wie-liest-man-ein-peptid-coa\/\">Weiter mit dem analytischen Leitfaden<\/a><\/p>\n<footer><strong>Quellen und Beispielhinweise<\/strong><\/p>\n<p>Die Zahlen und Kurven sind Lehrbeispiele, keine Testergebnisse aus Produktionschargen. Quellen gepr\u00fcft am 11 Oktober 2026.<\/p>\n<ul>\n<li><a href=\"https:\/\/database.ich.org\/sites\/default\/files\/ICH_Q2(R2)_Guideline_2023_1130_ErrorCorrection_2025.pdf\">ICH Q2(R2) \u00b7 analytical validation<\/a><\/li>\n<\/ul>\n<p>KI-unterst\u00fctztes Schreiben und Quellenpr\u00fcfung. Katalogmaterialien sind f\u00fcr Forschung, Entwicklung und Herstellung bestimmt, nicht f\u00fcr den menschlichen oder veterin\u00e4rmedizinischen Gebrauch.<\/p>\n<\/footer>","protected":false},"excerpt":{"rendered":"<p>Erfahren Sie, was \u201cnicht nachgewiesen\u201d aussagt und welche Zahl Sie noch ben\u00f6tigen.<\/p>","protected":false},"author":1,"featured_media":3054,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pim_family_ids":"318,344","pim_article_type":"Peptide buying and basics","pim_evidence_level":"Technical references and clearly labeled examples","pim_reviewer":"AI-assisted source and editorial check","pim_reviewed_date":"2026-10-11","pim_editorial_note":"Reference data and teaching examples are separated from NHD lot results; product specifications and availability require confirmation.","pim_review_status":"reviewed","pim_review_reason":"Teaching examples, arithmetic, source links and plain language checked; product enquiries linked.","pim_creation_method":"AI-assisted drafting, source checks, translation and generated comic illustration. This is not independent peer review or supplied-lot verification.","pim_sources":"[{\"title\":\"ICH Q2(R2): Validation of Analytical Procedures\",\"note\":\"International Council for Harmonisation. Step 4, adopted November 2023; error-corrected 2025.\",\"url\":\"https:\/\/database.ich.org\/sites\/default\/files\/ICH_Q2%28R2%29_Guideline_2023_1130_ErrorCorrection_2025.pdf\"},{\"title\":\"Teaching reference \u2014 database.ich.org \u2014 ICH_Q2(R2)_Guideline_2023_1130_ErrorCorrection_2025.pdf\",\"note\":\"\",\"url\":\"https:\/\/database.ich.org\/sites\/default\/files\/ICH_Q2(R2)_Guideline_2023_1130_ErrorCorrection_2025.pdf\"},{\"title\":\"ICH Q2(R2) Validation of Analytical Procedures\",\"note\":\"ICH Q2(R2) Validation of Analytical Procedures\",\"url\":\"https:\/\/www.ema.europa.eu\/en\/scientific-guidelines\/ich-q2r2-validation-analytical-procedures\"}]","footnotes":""},"categories":[20],"tags":[],"class_list":["post-3026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evidence-quality-guides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>\u201cNot Detected\u201d Is Not Zero: Read Detection and Quantitation Limits | NHD<\/title>\n<meta name=\"description\" content=\"Learn what \u201cnot detected\u201d tells you, and what number you still need.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nhdbio.com\/de\/peptid-coa-nicht-nachgewiesen-nachweis-und-quantifizierungsgrenzen\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u201cNot Detected\u201d Is Not Zero: Read Detection and Quantitation Limits\" \/>\n<meta property=\"og:description\" content=\"Learn what \u201cnot detected\u201d tells you, and what number you still need.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nhdbio.com\/de\/peptid-coa-nicht-nachgewiesen-nachweis-und-quantifizierungsgrenzen\/\" \/>\n<meta property=\"og:site_name\" content=\"NHD\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-03T16:08:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-15T03:53:29+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/nhdbio.com\/wp-content\/uploads\/2026\/10\/limits-cover-1024x683.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"683\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"NHD Technical Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:description\" content=\"Peptide Raw Materials and Custom Peptide Synthesis\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"NHD Technical Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-coa-not-detected-detection-quantitation-limits\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-coa-not-detected-detection-quantitation-limits\\\/\"},\"author\":{\"name\":\"NHD Technical Team\",\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#\\\/schema\\\/person\\\/0ffb0dec7fda0f720073fc468fac6fc1\"},\"headline\":\"\u201cNot Detected\u201d Is Not Zero: Read Detection and Quantitation Limits\",\"datePublished\":\"2026-10-03T16:08:47+00:00\",\"dateModified\":\"2026-10-15T03:53:29+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-coa-not-detected-detection-quantitation-limits\\\/\"},\"wordCount\":469,\"publisher\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/nhdbio.com\\\/peptide-coa-not-detected-detection-quantitation-limits\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/nhdbio.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/limits-cover.png\",\"articleSection\":[\"Evidence &amp; 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