This document provides a method for quantification of marker peptide of type I collagen which was purified products extracted from bovine tissues with liquid chromatography - tandem mass spectrometry (LC-MS/MS).

The method described in this document is intended to be used for marker peptide detection of purified bovine type I collagen which will be used for constructing tissue-engineered medical products (TEMPs) or other collagen-based biomaterials, for product quality control.

This method also can be used for qualitative analysis and quantitative detection of bovine-specific and/or type I-specific collagen in the samples mixed with other animal sources and/or other type collagen.

This document does not exclude other possible methods for quantifying type I collagen, such as hydroxyproline quantification, that can evaluate the total amount of collagen regardless of type.

NOTE 1        The collagen has been known there are greater than 28 types and with the different property in each one. This document focuses on the quantification of marker peptide of purified bovine type I collagen. Type I collagen isolated from skin, tendon, bone, etc., can contain other types of collagen, for example, type III and type V. And type I collagen can be sourced from bovine, swine, etc. For quantification of other types of collagens or type I collagen sourced from other species of animals can use this document as a template, but need to design collagen type-specific or/and animal species-specific characteristic peptides for LC-MS/MS method, as well as optimize the determination conditions.

NOTE 2        For quantification of the collagen marker peptide of scaffold which combined with other materials, or type I collagen contained in ECM materials of tissues or type I collagen-based regenerative tissues, can refer to this document, but need to isolate or/and purify the type I collagen with a reasonable and verified method at first (9,10), and then quantify it by referring to the method provided in this document.