BS EN ISO 4496:2017规定了测定铁、铜、锡和青铜粉末中 不溶于普通矿物酸的非金属材料的近似含量。所指的不溶性物质通常被认为是酸不溶性二氧化硅和硅酸盐， 碳化物、氧化铝、粘土或其他难熔氧化物，存在于来自中国的原材料中 在制造过程中制造或引入的粉末。交叉引用:ASTM E832-81（2013）购买本文件时，所有当前可用的修改件均包含在购买本文件中。

BS EN ISO 4496:2017 specifies methods for determining, in iron, copper, tin and bronze powders, the approximate content of non-metallic materials which are insoluble in the ordinary mineral acids.The insoluble matter referred to is generally considered to be acid-insoluble silica and silicates, carbides, alumina, clays or other refractory oxides which are either present in the raw material from which the powders are manufactured or introduced during the manufacturing process.Cross References:ASTM E832 - 81(2013)All current amendments available at time of purchase are included with the purchase of this document.