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- The speciation of silver in the lead concentrates were analyzed by means of optical microscope and electron probe micro-analyser (EPMA). 摘要利用光学显微镜、电子探针对铅精矿中银的赋存状态进行了分析。
- Through the use of AAS,high content lead in lead concentrates is determined,it's recovery efficiency is over 98.20%,the result is good. 采用原子吸收分光光度法测定铅精矿中高含量铅 ,其回收率为 98 2 0%25以上 ,结果较满意
- In this paper,the extensive studies on hydrometallurgy of processing lead concentrates are introduced and the various methods are properly reviewed. 本文介绍了处理铅精矿的湿法炼铅研究工作进展并对各种方法进行评述;
- The results indicated that large amounts of non-natural silver grains existed in this branch of lead concentrates and the silver grains were distributed around the galena in a loose flocculating form. 结果表明，此批铅精矿含有大量的非天然银矿物，银颗粒呈疏松絮状物分布在方铅矿周围。
- The lead concentration in cerebrum is higher than that in cerebella and hippocampus. 结果表明,大脑中铅的质量分数高于小脑和海马;
- The results showed that the lead concentration of atmosphere, river water, rice, radish and potato in the contaminated area was higher, (P<0. 01). 结果表明：污染区的大气、河水、大米、萝卜和土豆的铅浓度与对照地区相比，明显增高（P＜0．01）。
- The electrochemical response was characterized with respect to accumulation time, lead concentration, supporting electrolyte, pH value of the solution and possible interferences. 对富集时间、铅的浓度、支持电解质、样品溶液pH值及部分离子干扰等进行了实验。
- Activity of POD,CAT,SOD remarkably lower than that of ck when cadmium concentrations are higher than 50 mg/L and lead concentration are higher then 500 mg/L. 当Cd2+的浓度为50mg/L、Pb2+d浓度为500mg/L时3种酶的活性都明显低于对照。
- The lead concentration in Pb-Sn alloy plating bath was determined by standard additional atomic ab-sorption spectrometry, and the optimal determination conditions were obtained. 采用标准加入原子吸收分光光度法测定铅锡合金锭液中铅的浓度,试验确定了最佳的测定条件。
- Main products of zinc smelting operation sets smelting technology, lead-zinc mine, zinc concentrate, lead concentrate, Xinding, lead ingots, metal zinc powder. 主要经营产品氧化锌矿冶炼成套冶炼工艺，铅锌矿，锌精矿，铅精矿，锌锭，铅锭，金属锌粉。
- Determination of High Content Lead in Lead Concentrates by AAS 原子吸收分光光度法测定铅精矿中高含量铅
- The horse forged ahead the lead in the homestretch. 那匹马在最后阶段突然加速跑到前面。
- Shirley will try out for the lead in the play. 雪莉将参加该剧主角的选拔演出。
- Excessive patriotism can lead to xenophobia. 爱国主义过了头即可导致仇视一切外国人。
- Adopt flotation can get rid of lead from high leaded gold concentrate,and output qualified lead concentrate for sale. 采用浮选法可以从高含铅金精矿中脱除铅,并产出合格的成品铅精矿供外销。
- Lead aprons shield people from radiation. 铅做的工作裙可使人免进辐射。
- Graphite is used in making lead pencils. 石墨常被用来做成铅笔。
- They are equipped with continuous monitoring instruments for measuring sulphurdioxide,nitrogen oxides,photochemical oxidants and carbon monoxide.Respirable and total suspended particulates (dust) and lead concentrations are also measured. 站内的监察仪器，不断测量本港空气中二氧化硫、氧化氮、光化学氧化剂及一氧化碳含量，同时也测量可吸入悬浮粒子、总悬浮粒子(尘埃)和铅的含量。
- Lead will fuse at quite a low temperature. 铅会在相当低的温度下熔化。
- The team recovered its lead in the second half. 该队在下半场重新领先。
