共查询到20条相似文献,搜索用时 718 毫秒
1.
2.
3.
ICP-AES测定铁矿石中多元素的研究 总被引:1,自引:0,他引:1
提出了用ICP AES法同时测定铁矿石中Al,Ti,V,Mn,Cu,As元素的分析方法。各元素选用最佳光谱线和光谱仪合适的工作条件,测定数据的精密度和样品加标回收率结果令人满意,方法快速、简便。 相似文献
4.
本文针对人发中微量元素分析 ,采用微波溶样技术 ,加入内标元素 ,用ICP -AES法同时测定题示元素 ,结果满意。 相似文献
5.
文章使用电感耦合等离子体发射光谱法同时测定铁矿石中Mn、Ca、Mg、Al、Ti等五种元素的含量。优化了仪器的工作参数,充分考虑了溶解样品时酸体系的选择和五种元素谱线的选择。用该法测定这5种元素的方法检出限分别为Mn 0.00079 ug/m L、Ca 0.0066 ug/m L、Mg 0.0345 ug/m L、Al 0.0462 ug/m L、Ti 0.00197 ug/m L,相对标准偏差(RSD,n=12)5.4%,加标回收率为98%~103%。通过与国家标准物质验证,测定值与标准值相符。 相似文献
6.
用电感耦合等离子体原子发射光谱法(ICP—AES),对催化剂中的金属含量进行了测定。研究了微波消解对催化剂的溶样方法,进行了微波消解消化条件的选择,确定了ICP—AES的操作条件和适宜的实验条件。对催化剂中四种元素考察了准确度和精密度,该方法简便、快速、准确,大大提高工作效率,完全能够满足分析要求。 相似文献
7.
试验了微波消解/IcP—AES法测定锡镍铁中的锡、铝、钙、铬、磷等元素的主要条件及效果。提出了采用氢氟酸和硝酸微波消解溶解试料,以ICP—AES法测定各元素的含量。进行了试样溶解用酸及溶解温度等条件选择,光谱分析方法中谱线选择及干扰校正。在最佳实验条件下,对锡镍铁实际样品进行测定,用本法对同一试样中的各元素含量进行十一次平行测定,相对标准偏差为O.34%。1.51%之间,加标回收率为95.5%~104.o%2;N,具有较高的准确度和精密度,而且该方法更具有快速、高效等优点,完全能满足科研及生产中的测量要求。 相似文献
8.
ICP—AES测定石英砂中的铁、铝、钙、钛、硼、磷 总被引:5,自引:0,他引:5
本文阐述了用ICP—AES法同时测定石英砂中的Fe、Al、Ca、Ti、B、P,试样用HF和H2SO4加热分解,HCl溶解盐类。试样的处理只需一次便可做多元素的分析。测定结果准确、快速,相对偏差小,在操作上更易掌握。 相似文献
9.
ICP-MS法测定地球化学样品中As、Cr、Ge、V等18种微量痕量元素的研究 总被引:15,自引:0,他引:15
建立了测定地球化学样品中包括As、Cr、Ge、V等18种微量、痕量元素的ICP-MS方法。地化试样用HF-HNO3混酸分解后,以1 1 HNO3溶解干渣。由于制样不使用盐酸,避免了Cl对As、Cr、Ge、V的质谱干扰。用国家一级地球化学标准物质GBW 07309制备溶液优化仪器工作参数,并用于校准。方法测定限(6s)为:0.007~6.4μg/g,精密度(RSD%,n=12)为:29%~9.4%,经过国家一级地球化学标准物质的分析验证,结果与标准值吻合。方法已应用于国土资源调查的试样分析。 相似文献
10.
11.
12.
高频红外碳硫分析仪测定铁矿物硫含量 总被引:2,自引:0,他引:2
通常采用燃烧--中和法或燃烧-碘量法测定铁矿物中硫含量,这些测定方法耗时长,矿样熔融不完全,导致测定结果不稳定.尝试采用HCS-216A高频红外碳硫仪测定,在试验条件下,该法测定硫含量为1.18%、1.84%的标样,测定值为1.181%、1.844%,相对标准偏差(RSD)小于0.35%(n=9).采用本法与常规燃烧中... 相似文献
13.
报道了用笑气-乙炔火焰原子吸收光谱法测定氟石中氧化铝。试样经氢氟酸处理、高氯酸冒烟后,加入盐酸和硼酸温热溶解残渣。用富燃笑气乙炔焰在分析线A1309.3 nm处,测定铝的吸光度。试验了溶样酸和酸度、硼酸、基体钙及共存元素对测定的影响。校准用的标准溶液系列中加入相同量的钙和硼酸作基体匹配。方法回收率96%~105%。本方法准确度、精密度满足商品检验的要求,已用于出口氟石的检验。 相似文献
14.
基板玻璃是显示器面板的关键玻璃材料,决定了面板的性能和质量,因此需要对其成分进行精确测定。基板玻璃生产过程中,用于澄清作用的铂金通道会受到侵蚀溶解出铂、铑。研究了基板玻璃中铂、铑等微量元素的测试方法,提出了基板玻璃的溶解制备方法,以氢氟酸挥发基体中氧化硅并以硝酸作为介质排除基体效应;探索了微量元素铬、钴、锰、镍、锆、铂、铑的光谱特性,分析了共存元素谱线叠加干扰影响,选取了各待测微量元素无干扰的最佳谱线波长;采用ICPAES中标准曲线法测试基板玻璃中的微量元素,该方法测试结果精密度和准确度高,对于实际生产具有重要的指导意义。 相似文献
15.
16.
介绍矿石中测定铁的方法,主要是用HCl-NH4F-HClO4混酸快速溶样,用Zn粉还原,K2Cr2O7溶液滴定。其应用范围宽,RDS在0.068~0.080之间,结果满意。 相似文献
17.
18.
《Applied Clay Science》2010,48(3-4):311-316
Lizardites in Yuanjiang laterite ore were characterized using X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR). Their leaching behaviour in sulphuric acid was investigated. XRD patterns show that there are two different lizardite polytypes in Yuanjiang laterite ore: lizardite-1T and lizardite-1M. The crystal order of the lizardites between soil and rock samples was different, which was demonstrated by XRD and FTIR spectrum analyses. The obvious change of the crystal cell volume was observed in the lizardite-1T of soil sample, with higher iron content, whereas the crystal cell varied little for the lizardite-1T of rock sample, with higher aluminum content. FTIR spectrum, EDS analyses and the leaching experiments show substitution of octahedral nickel, iron and aluminum, as well as tetrahedral aluminum. Iron occurred as ferrous and ferric iron in the lizardite-1T of rock sample, mostly as ferrous iron in the lizardite-1M and as ferric iron in the lizardite-1T of soil and rock fragment samples. The results from leaching experiments also show that the leachability of lizardite-1T in sulphuric acid decreases in the following sequence: lizardite-1T of laterite soil > lizardite-1T of rock fragments > lizardite-1T of rocks. Lizardite-1M leached faster than lizardite-1T of rock fragments. The leaching behaviour differences of lizardites in Yuanjiang laterite ore may be explained by the various crystal structures resulting from the weathering process of laterite ores and the substitution of metal cations such as Ni2+, Fe2+, Fe3+ and Al3+. It is concluded that rapid dissolution occurs preferentially for the lizardite with low crystal order, low aluminum content and high iron content while acid leaching laterite ores. 相似文献
19.
《分离科学与技术》2012,47(5):769-776
In India, iron ores processing industries play a vital role in the Indian economy. During the washing and processing of iron ores, slimes less than 0.15 mm are generated and discarded into the tailing pond. These slimes need processing as they cannot be used directly in blast furnaces. In the present investigation, a typical iron ore slime sample containing 59.22% Fe, 4.76% SiO2, and 4.57% Al2O3 was taken. The desliming operation was carried out by using 2” Mozley hydrocyclone. The process variables used to attain the optimum condition of desliming include the spigot opening, the feed pressure, and the diameter of the vortex finder maintaining the pulp density at 10% solid. The deslimed sample was treated by different techniques including an enhanced gravity separator to achieve iron concentrate with 65% Fe so that it can be used for steel making through pelletization. The yield of the magnetic concentrate is about 46.8% with 65% Fe. To improve the yield, the overflow from 2” hydrocyclone and the rejects from magnetic separation were deslimed and processed to recover the iron values. The final concentrate is 74% yield with 64.8% Fe, 1.76% SiO2, and 1.8% Al2O3. 相似文献
20.
建立了电感耦合等离子体原子发射光谱法测定电池用磷酸铁中磷含量的分析方法。试样经盐酸在低温条件下溶解,选择P 177.499 nm作为仪器分析谱线,铁基体效应的影响经直接稀释和两点背景校正法后得以消除。结果表明,在磷质量浓度为0~50 μg/mL时,标准曲线线性相关系数大于0.999,方法检出限为0.02%。将该方法应用于电池用磷酸铁样品中磷含量的测定,其相对标准偏差小于0.50%,测定结果与HG/T 4701—2014《电池用磷酸铁》测定值基本一致。 相似文献