本文件规定了在海藻中测定盐酸（胃酸浓度）可提取无机砷的方法。已进行合作研究（附件A）。该方法适用于以干重计测定不低于1mg/kg和低于100mg/kg的无机砷。无机砷的量被认为是由本文件描述的程序确定的那部分

This document specifies a procedure for the determination of hydrochloric acid (gastric acid concentration) extractable inorganic arsenic in seaweed. Collaborative studies have been carried out (Annex A). The method is suitable for the determination of inorganic arsenic not less than 1 mg/kg and below 100 mg/kg on a dry weight basis. The amount of inorganic arsenic is considered to be that part determined by the procedure described in this document.