1) Fire assaying
火试金法
1.
Application of fire assaying to analysis of precious metal element;
火试金法在贵金属元素分析中的应用
2.
Determination of gold in alloy gold of low fineness by means of fire assaying with supplemental gold;
添金火试金法测定低成色合质金中的金
3.
The noble metal granules obtained after fire assaying of sample was dissolved in nitric acid,and adding hydrochloric acid appropriately to drive away nitric acid,then extracting Pd in 8mol/L medium of hydrochloric acid by petroleum aether-chloroform solution.
试样经火试金法处理后 ,将所得贵金属颗粒用硝酸溶解 ,加入适量的盐酸赶尽硝酸 ,然后在 8mol/L的盐酸介质中用石油醚 -三氯甲烷溶液萃取 ,以DDO为显色剂进行钯的光度法测定。
2) fire assay
火试金法
1.
After being smelted with fire assay and enriched with cupellation method,the precious metal is decomposed with chloroazotic acid.
试样经火试金法熔炼和灰吹富集后,贵金属合粒以王水分解,在盐酸介质中,用火焰原子吸收分光光度法测定钯量。
2.
Determination of Au in Au-Sn alloy was investigated by fire assay.
研究了采用火试金法直接测定金锡合金中金的含量。
3) Fire-assaying method
火法试金分析
4) Fire Assaying
火试金
1.
Determination of the Trace Platinum and Palladium in Anode Neutralization by GFAAS and Preconcentration with Fire Assaying;
火试金富集-石墨炉原子吸收光谱法测定阳极泥中的微量铂和钯
2.
Abstract:It was introduced that progress actuality and application foreground of the stutra analysis technique of gold in the up-to-date China such as fire assaying and iodimetry.
以火试金和滴定法为例,介绍了经典测金方法的发展现状和应用前景。
5) fire assay
火试金
1.
Platinum and palladium in anode mud of copper and lead electrolysis were analyzed with fire assay attack separation and ICP-AES.
采用火试金分离捕集,电感耦合等离子体发射光谱法分析了铜铅电解阳极泥中的铂和钯,重点试验了银的沉淀分离条件,方法应用于实际样品的分析,加标回收率大于95%。
2.
In this paper,the method,step and requirement to determine gold and silver content of gold-bearing quartz by fire assay are described.
本文说明了用火试金法测定金块矿中金和银量的方法、步骤。
6) fire assaying method
火试金
1.
A fire assaying method for the successive determination of gold and palladium in curde copper without preseparation was proposed The method was accuracy and highly precis
提出了对粗铜样品不经预先分离铜而直接进行火试金 ,连续测定样品中的金和钯量。
补充资料:火试金法
火试金法 fire assay 通过熔融、焙烧测定矿物和金属制品中贵金属组分含量的方法。主要步骤为:①取样,由于贵金属常以无规则的分散状态分散于矿物中,故需大量取样才能具有代表性。②熔样,将粉碎好的试样与适当配方的熔剂如碳酸钠、硼砂、玻璃粉、一氧化铅、食盐、面粉等混匀,加热熔融。一氧化铅还原为金属铅并和贵金属一起沉入容器底部,冷却后变成一个含有贵金属、大量金属铅和其它金属杂质的金属小球(俗称铅扣)。③烤钵试金,将所得金属小球放入一骨灰(或素烧瓷)制的烤钵中,将烤钵放入一特制的能提供强氧化气氛的炉子里加热(称为灰吹)。此时球中的铅和金属杂质被氧化成为炉渣,或浸渍到烤钵的孔隙中,而与不被氧化仍保持金属状态的金、银等贵金属分开。取出金、银小球,冷却,洗净烘干后,即可当作试样。④称量,称出金银小球试样的重量,即为金银合量。然后用热稀硝酸处理此试样,银被溶解。不溶解的残渣,经洗净烘干后,再称重,即为金的重量。两次称重之差,即为银含量。 样品中的铂族元素在火试金过程中,铂、钯、铑、铱会溶解在熔融的金属铅中,在烤钵中加热时也不被氧化,后来的热稀硝酸溶解时,只有钯被溶解,而铂、铑则留在金中。铱则在烤钵内被氧化成一种黑色沉积物附在金属小球表面。锇、钌在加热时会生成挥发性氧化物而损失,故火试金法不适合于富集锇和钌。 |
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条