摘要
样品采用过氧化钠熔融,酒石酸络合提取,电感耦合等离子体发射光谱法测定黑钨精矿和中矿中的锰含量,碱熔络合体系避免了酸处理样品时大量钨酸沉淀的生成,解决了钨酸沉淀导致的溶矿不完全和夹杂、吸附待测元素的问题。在优化的工作条件下,方法检出限为0.019μg/mL,精密度(RSD,n=11)为0.92%～1.50%,并且具有较高的回收率(97.5%～104.0%),单次测定结果与协同定值结果的偏差小于国家标准GB/T 6150.14—2008硫酸亚铁铵法实验室间允许差。方法简便快速,无明显基体干扰,满足了国家标准黑钨精矿中锰的检测要求,可用于高、中品位钨矿石样品中低含量锰的准确测定。
A simple, rapid and interference-free method of Na2O2 ore fusion and complexometric extraction with tartaric acid is proposed for the determination of manganese （Mn） in black tungsten concentration and middling by Inductively Coupled Plasma-Atomic Emission Spectrometry （ICP-AES）. The precipitation of tungstie acid was successfully avoided by this preparation method, which resolved problems such as incomplete ore digestion and encapsulation/adsorption of the target elements. Under the optimized conditions, the detection limit （LOD） for this method was 0. 019 g/mL with relative standard deviations （ RSD, n = 11 ） in the range of 0.92% - 1.50%. Moreover, good recoveries were obtained （97.5% -104.0% ）. The deviation between a single determination result and a certification result was much lower than the allowable deviation of national standards with ferrous ammonium sulfate （GB/T 6150.14--2008） between laboratories. This method met the requirements of national standards for the accurate determination of Mn in black tungsten concentration and middling.
出处
《岩矿测试》
CAS
CSCD
北大核心
2012年第3期438-441,共4页
Rock and Mineral Analysis
基金
中国地质大调查项目(1212010916021)
关键词
黑钨精矿
黑钨中矿
锰
过氧化钠碱熔
酒石酸
电感耦合等离子体发射光谱法
black tungsten concentration
black tungsten middling
manganese
Na2 O2 fusion
tartaric acid
Inductively Coupled Plasma-Atomic Emission Spectrometry
