火试金富集—电感耦合等离子体质谱法测定铁精矿中金铂钯

Fire After Enrichment-Inductively Coupled Plasma Mass Spectrometry Iron Ore Au,Pt and Pd

采用铅试金法富集铁精矿中贵金属,用盐酸溶解贵金属合粒的银,再加入硝酸配成王水溶液溶解贵金属合粒,然后定容于容量瓶中,然后利用电感耦合等离子体质谱仪测定该溶液[1]。确定了在熔融温度为1150℃,熔融时间在20min,灰吹温度为1000℃,灰吹时间为1h。在王水溶解条件下,讨论加入酸量。确定了在100℃电热板上先加入5m L硝酸溶解10min再加入15m L盐酸溶解5min的方法,并对ICP-MS的干扰消除进行了讨论。测定的铁精矿的样品中的金、铂、钯的检出限分别为0.05,0.03,0.03 ng/g,相对标准偏差为1.1%~3.2%。

Using lead test gold enrichment of iron ore in the precious metals, dissolved silver from Precious metal granules with HNO3, then add HCl into the water solution of precious metal particles dissolved, and then fixed in the volumetric flask, and then use the inductively coupled plasma mass spectrometer to determine the Solution. The melting time was set at 1150℃, the melting time was 20min, the ash blowing temperature was 1000℃, and the soaking time was lh. Under the condition of chloroazotic acid dissolution, the amount of acid added was discussed, the method of dissolving 5mL HNO3 for 10min and adding 15mL HCl for 5min was added to the heating plate at 100℃, and the interference elimination of ICP - MS was discussed. The detection limits of gold, platinum and palladium in the samples were 0.05ng/g, 0.03ng/g, 0.03ng/g,and the relative standard deviations were 1.1% to 3.2%, respectively.