摘要
将称量后的地质样品直接倒入50 m L专用消解容量瓶中,用少量水润湿,加入15 m L HCl和5 m L HNO3,置于150℃电热板上加热消解90 min,冷却至室温后直接用水稀释至刻度,混匀澄清后,采用火焰原子吸收分光光度仪进行测定。该方法简便快速,试剂消耗少,对操作人员及环境的危害小。该方法经6个国家标准物质的7次平行测定验证,分析结果与标准值的相对误差均小于DZ/T 0130—2006《地质矿产实验室测试质量管理规范》中所规定的相对误差允许限,其中最大相对标准偏差为2.61%,测定结果准确、可靠,适用于大批量地质样品的检测。
The weighed geological samples are poured directly into a 50 mL digestion-dedicated volumetric flask, wetted with a small amount of water and addition of 15 mL HCl and 5 mL HNO3. And then they are placed on the 150℃ electric heating plate for digestion for 90 minutes, then diluted to the volume by adding water after it cools down to room temperature. After mixing and clarification, the solution is analyzed by flame atomic absorption spectrophotometer（ FAAS）. This method is simple and rapid, consumes less reagent and does not jeopardize the health of personnel and the environment. The method is verified by parallel determination 7 times with 6 national standard substance, the analysis results and the standard value are less than the relative error allowable provided by ＂The Specification of Test Quality Management of Geological Laboratories（ DZ/T 0130 -2006）＂. The maximum relative standard deviation is 2.61%. The determination results are accurate and reliable and can be used to analyze large quantities of geological samples.
出处
《黄金》
CAS
2015年第6期78-80,共3页
Gold
