1)  trace amount of vanadium
微量钒
2)  minim
微量
1.
The progress in determining the minim Gallium which includes absorptiometric analysis is introduced, and various analytical approaches are discussed such as spectrophotofluorimeter, atomic absorption spectrophotometry and polarographic method etc.
由于镓是稀散金属 ,且分布分散 ,因此对于微量镓的分析测定就极为重要 。
3)  trace
微量
1.
Study on Simultaneous Determination of Trace Fe~(2+) and Fe~(3+) in Rock Salt by Spectrophotometry;
分光光度法同时测定岩盐中微量Fe~(2+)和Fe~(3+)的研究
2.
Detecting the Content of Trace Methanol,Ethanol,Acetone,Methoxycarbonyl Acetate,Vinyl Acetate from Industrial Cooling Wastewater with Gas Phase Chromatography Method;
用气相色谱法测定工业冷却废水中微量甲醇、乙醇、丙酮、醋酸甲酯、醋酸乙烯的含量
3.
The determination of trace calcium in highly purity RE samples by the atomic absorption spectrophotometry combined with standard addition method;
标准加入原子吸收分光光度法测定高纯稀土产品中的微量钙
4)  microscale
微量
1.
Green Chemistry Should Be Made from the Chemical Experiment——On Preparatory Instrument of Semi-microscale Organic Experiment;
绿色化学应当从化学实验开始——谈半微量有机制备仪的设计思想
2.
Smallscale semimicro microscale organic experiments have been practised step by step.
本文介绍了小量—半微量—微量有机化学实验的教学内容和特点 ,及在教学中初步试用的效
5)  microamount
微量
1.
Determination of glutamate in microamount cerebrospinal fluid after acute brain injury in mice;
小鼠急性脑损伤后微量脑脊液谷氨酸浓度的测定
2.
This paper introuduced to use volumetric analysis to determine the microamount calcium and magnesium in sodium sulfate by diminishing the affect of iron(Ⅲ), and validated the reliability of this method.
提出采用沉淀分离法消除Fe3 + 等离子的干扰 ,用容量法来测定Na2 SO4中微量的钙、镁含量 ,并验证了该方法的可靠
6)  micro
微量
1.
Spectrophotometric determination of micro iron with the ternary complex system of FeⅢ-acetylpropanone-crystal violet;
FeⅢ-乙酰丙酮-结晶紫三元络合物分光光度法测定微量铁
2.
Study on Chromosome Aberrations Test determinated by Micro-whole Blood Culture in Vacuum Blood Collection Tube;
微量全血真空采血管培养法应用于染色体畸变分析的研究
参考词条
补充资料:钒磷铁矿提钒


钒磷铁矿提钒
extraction of vanadium from the bear vanadium phosphosiderite

和94%。fantintiekuang tifan钒磷铁矿提钒(extraetion of vanadium frombear vanadium phosphosiderite)以含钒磷铁矿为原料制取五氧化二钒的帆提取方法。主要包括钠化焙烧和湿法漫出两道作业。直接用作提饥原料的是含饥磷铁。 含钒磷铁是饥磷铁矿电炉生产单质磷和磷肥的副产品。钒磷铁矿分布在美国爱达荷、蒙大拿、怀俄明、犹他等州,含Pz05 24%~32%、V:O。0.267%~0.625%和少量的铬、镍和钥等。美国克尔麦吉(Kerr-MeGee)化学公司所用的含钒磷铁含饥3.26%~5 .2%、磷24.7%~26.6%、铁59.9%一68.5%、铬3.4%一5.7%、镍。.84%~1%。先将含钒磷铁磨至粒度小于。.42mm,配入1.4倍纯碱和。.1倍的食盐在回转窑中于1043~lo63K温度下焙烧,钒便转变成水溶性的钠盐。熔烧块在加热到沸腾的水中浸出,钒、铬、磷均溶入浸出液。浸出浆液经过滤处理。滤液冷却结晶析出磷酸钠晶体,用离心机分离。晶体中如仍含有钒和铬,可用水重溶后再结晶分离,直到获得合格的磷酸钠(NaaPO;)晶体产品。若Na3PO‘结晶母液含磷高于0. 989/L时则要加入CaclZ,使其生成磷酸钙沉淀,然后水解回收钒。随后往母液中加入硝酸铅,沉淀出铬酸铅。此工艺的钒、铬和磷的回收率分别为85%、65%
说明:补充资料仅用于学习参考,请勿用于其它任何用途。