本文件同样采用ISO 12743:2021，该标准规定了从流动溪流和固定批次中取样铜、铅、锌和镍精矿的基本方法，包括停止皮带取样，以根据相关国际标准提供化学分析、物理测试和水分测定用样品。如果浓缩物易被严重氧化或分解，则使用一个普通且足够精确的样品进行水分测定和化学分析，以消除偏差（见AS 2863）。

This document identically adopts ISO 12743:2021 which sets out the basic methods for sampling copper, lead, zinc and nickel concentrates from moving streams and stationary lots, including stopped-belt sampling, to provide samples for chemical analysis, physical testing and determination of moisture content, in accordance with the relevant International Standards. Where the concentrates are susceptible to significant oxidation or decomposition, a common and sufficiently precise sample is used for moisture determination and chemical analysis to eliminate bias (see AS 2863).