本文件概述了碳、氢、氧和氮同位素比值分析的现有应用，这些应用与生物基原料、产品和生产工艺的分析有关。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document provides an overview of existing applications of isotope ratio analysis of carbon, hydrogen, oxygen and nitrogen that are relevant to the analysis of bio-based feedstocks, products and production processes.All current amendments available at time of purchase are included with the purchase of this document.