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空气-乙炔火焰原子吸收法测定钙的化学干扰机理及其消除 总被引:2,自引:0,他引:2
原子吸收分光光度法测定试样中的钙, 已在诸多实验室中广泛被采用, 但就空气- 乙炔火焰而言,对测定钙的影响因素比较多、分析方法也较为复杂。针对空气- 乙炔火焰原子吸收分光光度法测定钙的化学干扰机理及其消除进行了试验研究,并取得了较好的效果。 相似文献
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提出了一个用火焰原子吸收分光光度法测定铁矿中氧化钙、氧化镁的方法。研究讨论了酸度、干扰离子、工作条件等因素的影响。分析中。以HNO3—HF—HCLO4混合酸分解样品。以SrCL2作为钙、镁的释放剂,用工作曲线法测定。方法简便、快速、准确。应用于铁矿样品的测定,结果令人满意。 相似文献
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测定水中PPb级的痕量铍,近年来主要的方法有分光光度法、气相色谱法、火焰原子吸收光度法、石墨炉原子吸收光度法、ICP发射光谱法。其中用分光光度法测定水中痕量铍,一般常用三苯甲烷染料和表面活性剂与铍生成三元络合物,以提高灵敏度,降低检测下限。我们参考资料试验了在pH5.0的条件下、用络天 相似文献
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原子吸收分光度法测定钾长石中的氧化钾、氧化钠 总被引:1,自引:0,他引:1
用火焰原子吸收分光光度法测定钾长石中的氧化钾、氧化钠。通过干扰元素等的试验,提出了测定氧化钾、氧化钠的条件,并成功的用于生产实践。 相似文献
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研究了采用火焰原子吸收分光光度法对稀土(镁)硅铁合金中钙,镁,锰三元素联合测定的条件,确定了分析方法,对标准样品和试样进行了测定,取得了满意结果。 相似文献
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原子吸收分光光度法测定废水中的微量砷,目前常用的有火焰法及无火焰法等。火焰原子吸收法灵敏度较低,无火焰原子吸收法灵敏度虽高,但重现性差。本法采用一种无载气简易氢化物发生器装置,利用雾化器产生的负压将发生器内产生的砷化氢气体直接导入空气——乙炔火焰进行原子吸收测定。本方法具有操作简便,快速准确,干扰少等优点,其相对灵敏度为0.0019微克/毫升,比待测溶液直接导入火焰原子吸收法(0.2微克/毫升)提高约100倍,相对标准偏差小于2%。使在不预先富集分离水样的条件下,可直接测定工业 相似文献
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原子吸收分光光度法与1,10-二氮杂菲分光光度法测定水中铁具有精密度高、准确度好的特点。用两种方法测定的已知样为0.8mg/L和1.0mg/L,经比较1,10-二氮杂菲分光光度法比原子吸收分光光度法精密度更高、准确度更好。 相似文献
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<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic 相似文献
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正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform. 相似文献
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正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness. 相似文献
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正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully. 相似文献