依 照相关标准对样品进行消解。每样样品,各称取0.5g置于聚四氟乙烯微波消解罐中,加入8ml conc.HNO3 (65%,Merck), 然后置于微波消解系统内(CEM(MARS)),应用下面加热程序进行微波消解。待消解程序反应结束并冷却至室温后将所有样品溶液移入50ml的容量瓶, 用蒸馏水稀释至刻度,混匀。在三个样品的消解溶液中均发现...
3 六价铬培训 六价铬前处理分类 非金属:IEC62321,EPA3060,六价铬前处理分类 SJ/T11365 金属:IEC62321,ISO3613,JISH8625GB/T9791,SJ/T11365，EN15205 皮革:DIN53314,BSCEN14495,ISO17075,EN420,GB17593(纺织品类)4 一 非金属 5 非金属 1.IEC62321非金属IEC62321(111-116-FDIS):DeterminationofHexavalent...
摘要：采用改进的Tessier连续浸提法，结合电感耦合等离子体原子发射光谱、X射线衍射、扫描电子显微镜和能谱等测试手段，分析了不同形态Cr在水泥水化产物中的分布。结果表明：硅酸盐水泥硬化体中可交换态和碳酸盐结合态Cr占其总量的7%～35%，主要以吸附和沉淀形式存在于颗粒表面，对pH变化较为敏感，Cr的溶出对应于Ca(OH...
Measurement of photosynthetic activities Different photosynthetic parameters such as the rate of photo- synthesis, photosynthetic yield, intracellular CO2 conc., CO2 release, stomatal conductance, and the rate of transpiration were recorded using an infrared gas analyzer (IRGA; LI- COR, http://www....
of CrFinal Conc. of Cr×100Residual tannic acid was measured by Hagerman and Butler (1989) method. Briefly, a mixture of 3 ml of triethanolamine (1%, v/v) +1 ml of filtrate and 1 ml FeCl3 (0.01MFeCl3 in 0.01NHCl) solution was stabilized for 15 min. at 27 °C. Then the ...