ICP-OES法测定铜电解液中铅、锌、镍、铋、锑、砷

探讨了用电感耦合等离子发射光谱仪(ICP-OES)对铜电解液中铅、锌、镍、铋、锑、砷元素分析的基本条件,确定了适当的谱线,对方法的精密度和准确度进行实验。实验结果表明,各元素的相对标准偏差均小于5.5%,加标回收率均在93.8%~99.8%。适用于铜电解液中铅、锌、镍、铋、锑、砷元素含量的测定。     

X-射线荧光光谱测定铅基合金中的砷、铜、锑、锡、铋和铅

建立了X-射线荧光光谱测定铅基合金中砷、铜、锑、锡、铋、铅等6种元素的快速分析方法。通过优化测试条件,确定了最佳测试参数,有效地避免了其他元素的干扰。基于干扰元素的强度和浓度,采用经验影响系数法校正绘制标准曲线。结果表明,在一定浓度范围内,砷、铜、锑、锡、铋、铅的标准曲线具有良好的线性关系,其中铋、锑和锡的相关系数均在0.999以上。精密度试验结果表明,测定结果相对标准偏差在0.02%~4.2%。准确度试验结果显示,测定值与参考值基本吻合。     

电感耦合等离子体发射光谱(ICP-OES)法测定铅烟灰中铋、铟、锑、锡

研究了准确快速测定铅烟灰中铋、铟、锑、锡的分析方法，分析了仪器观察高度、研究内标引入方式、定容体积、主量基体元素对测定结果的影响。最终确定了径向最佳观察高度为10 mm、采用过氧化钠高温熔融试样、提前引入内标、无需准确定容的方式，建立了电感耦合等离子体发射光谱(ICP-OES)法同时测定铅烟灰中铋、铟、锑、锡的方法。铋、铟、锑、锡的方法检出限分别为0.0039%、0.0062%、0.0097%、0.0060%,加标回收率在96.0%～104.0%,相对标准偏差(n=11)<2%。方法缩短了检测周期，提高了多元素检测的效率。     

阳极溶出伏安法测定纯锌、铝中的铜、铅、镉

<正> 测定锌、铝中痕量杂质是鉴定纯度的基础工作。玻璃碳汞膜电极微分脉冲阳极溶出伏安法(DPASV法)已被用于测定水中铜、铅、镉。但是,纯锌、铝中砷、锑、铋、锡等对测定痕量的铜、铅、镉有干扰。利用巯基棉在0.1M盐酸介质中,能定量吸附     

ICP-MS快速测定锌精矿中砷、铅、锑、镉、镍、钴方法研究

锌精矿中含有砷、铅、镉等有害金属元素,在冶炼过程中不但影响产品质量,降低冶炼价值,因此对其有害杂质元素的检测至关重要。ICP-MS法具有快速、简便、干扰少、高灵敏度、测定范围宽等优点。本文研究了用盐酸、硝酸、氢氟酸熔样,冒硫酸烟,赶尽氢氟酸后,用ICP-MS法对锌精矿中的砷、铅、锑、镉、镍、钴共6种元素进行同时测定。并对方法的检出限、精密度和准确度做了实验研究,实验结果表明该方法快速、准确、可靠,能够满足锌精矿中砷、铅、锑、镉、镍、钴含量的测定要求。     

碱浸渣综合利用新工艺研究

介绍了从碱浸渣中综合回收稀贵金属及其它有价元素的新工艺:用萃取法先把稀有元素碲与其它元素分离,然后分别回收碲、铜、锑、铋、铅和金银.碲、金、银的回收率均在95%以上,铜、锑、铋的回收率大于90%,铅的直收率大于80%.主产品Te02和PbS04的纯度在98%以上.     

烟化法综合处理铅锑鼓风炉渣的工艺实践

因历史原因,河池地区有大量铅锑矿鼓风炉冶炼渣富集有价金属铅、锑、锌、铟等,以前受冶炼技术条件限制而无法回收,大量冶炼渣长期堆存。采用烟化炉还原挥发处理铅锑鼓风炉冷渣,可以综合回收其中锌、锑、铅、铟等有价金属。介绍了烟化炉全冷料还原挥发的操作条件和技术指标,对烟化炉生产过程中常见故障的发生原因及处理方式也进行了介绍。     

日本工业废物的有效利用情况

仅就与硫酸工业关系密切的废物有效利用情况说明如下: 一、金属成分 铂、金、钯、银等贵金属自不必说,就是铜、镍、钴、铅、锌、铬、钼、铁、锰、锑、铋及钒等几乎所有的金属都在回收。特别是将硫铁矿烧渣中所含的微量铜、锌、铅、镉、铋等回收后,使铁的品位提高,制成烧结球用于炼铁是众所周知的了。虽然从钒氧化触媒回收五氧化钒方面做了种种努力,但无奈含量低,其收益补偿不了运费及回收车间的动力消耗,且至今尚未找到有效的利用     

ICP-MS法测定磷酸二氢钾中杂质元素

建立了电感耦合等离子体质谱（ICP-MS）法测定磷酸二氢钾中铍、镁、镍、铜、锌、砷、硒、镉、锑、铊、铅等11种杂质元素的分析方法。样品经硝酸消解后进行分析,选用锂、铋、铟、铑元素为内标混合液校正基体干扰。研究结果表明,该方法对11种待测元素的加标回收率范围为86.00%～118.77%,相对标准偏差范围为3.79%～8.60%,方法的准确度和精密度均符合要求。该方法简便、快速,能满足磷酸二氢钾中多种杂质元素同时测定的分析需求。     

发射光谱分析方法

纯镍中杂质元素的光谱测定本法系采用压片法。将试样以硝酸溶解,经高温灼烧为氧化镍粉末。0.5克氧化镍粉末用镶嵌机压成小片,直流电弧激发。阳极激发可分析砷、铅、锡、锑、铋、镉、锌,阴极激发可分析钴、铁、     

ICP—AES法测定松茸菌中的11种微量元素

讨论ＩＣＰ－ＡＥＳ法测定松茸菌中的１１种常量及微量元素，采用高纯ＨＮＯ３－ＨＣｌＯ３体系，选择合适的分析线及仪器，元素间的干扰用等效浓度法校正，该方法简便，快速，灵敏度高，并得到准确可靠的结果。     

合成对甲苯磺酰基甲基异腈生产中成品及其中间体分析

就工业合成对甲苯磺酰基甲基异腈生产中成品及其中间体对甲苯亚磺酸钠、对甲苯磺酰基甲基甲酰胺分别拟定了定量分析方法。三者均采用化学法测定，准确方便。     

DELIQUORING BY EXPRESSION -PART 1 CONSTANT-PRESSURE EXPRESSION

The basic analitical method for so-called expression operation, the separation of liquid from solid-liquid systems by compression, are presented in view of the flow through compressible porous media. It has become evident that the expression mechanism consists of two flow phenomena. These types of phenomena can be analyzed by consideration of the flow mechanism through compressible porous beds, first by the filtration theory and second by the so-called consolidation theory. A simplified equation is also presented. It is shown that the simplified equation is well applicable to industrial expression problems even when the creep effects of matarials to be expressed are appreciable     

MATHEMATICAL SIMULATION OF A NEWLY-DEVELOPED SEED-COTTON DRYER

The basic analitical method for so-called expression operation, the separation of liquid from solid-liquid systems by compression, are presented in view of the flow through compressible porous media. It has become evident that the expression mechanism consists of two flow phenomena. These types of phenomena can be analyzed by consideration of the flow mechanism through compressible porous beds, first by the filtration theory and second by the so-called consolidation theory. A simplified equation is also presented. It is shown that the simplified equation is well applicable to industrial expression problems even when the creep effects of matarials to be expressed are appreciable     

DELIQUORING BY EXPRESSION -PART 1 CONSTANT-PRESSURE EXPRESSION

The basic analitical method for so-called expression operation, the separation of liquid from solid-liquid systems by compression, are presented in view of the flow through compressible porous media. It has become evident that the expression mechanism consists of two flow phenomena. These types of phenomena can be analyzed by consideration of the flow mechanism through compressible porous beds, first by the filtration theory and second by the so-called consolidation theory. A simplified equation is also presented. It is shown that the simplified equation is well applicable to industrial expression problems even when the creep effects of matarials to be expressed are appreciable     

MATHEMATICAL SIMULATION OF A NEWLY-DEVELOPED SEED-COTTON DRYER

The basic analitical method for so-called expression operation, the separation of liquid from solid-liquid systems by compression, are presented in view of the flow through compressible porous media. It has become evident that the expression mechanism consists of two flow phenomena. These types of phenomena can be analyzed by consideration of the flow mechanism through compressible porous beds, first by the filtration theory and second by the so-called consolidation theory. A simplified equation is also presented. It is shown that the simplified equation is well applicable to industrial expression problems even when the creep effects of matarials to be expressed are appreciable     

Characteristics and Fatty Acid Composition of Almond Tegument Oil — Comparison with Almond Kernel Oil

The total crude fat on dry basis of almond tegumet was about 14% by weight. Chemical and physical characteristics of this oil were determined. The content of unsaponifiable matter, 3.75%, was high. The percentage of saturated acids was 10.32%. The high content of essential fatty acids, 40.34% of linoleic and 1.28% of linolenic should be pointed out. Experimental results corresponding to tegument and kernel oils were compared. Gas chromatographic retention indices of fatty acids methyl esters on Carbowax 20-M, DEGS and SE-30 were determined with analitical purposes.     

Quantitative determination of titanium dioxide in cellulose acetate spinning solutions

Conclusions A photometric method for determining the titanium dioxide content of cellulose acetate spinning solutions has been developed.The proposed method increases the accuracy and reproducibility of the results and shortens the time for analysis by a factor of two.The use of this new method significantly improves working conditions and raises safety technique.Translated from Khimicheskie Volokna, No. 6, pp. 54–55, November–December, 1989.     

热虹吸式再沸器的压力平衡设计

热虹吸式再沸器是石油化工行业广泛使用的传热设备,是自然循环单元操作,动力来自与之相连的精馏塔塔釜液位产生的静压头和被加热流体的密度差,因此再沸器的设计不仅要满足其传热的需要,也要满足其系统流体力学压力平衡的需要。本文以TEMA标准、国家标准和石化标准为依据,提出一套完整的再沸器压力平衡计算方法及步骤。利用此计算方法,对某催化热裂解装置中未达到换热要求的脱丁烷塔再沸器进行压力平衡和传热核算,发现此台再沸器的安装高度不能满足目前装置运行的要求,这是造成气化率低的主要原因。根据核算结果和现场设备布置,提出相应的改造方案。最后本文提出热虹吸式再沸器压力平衡设计中的要点及注意事项,以满足再沸器运行中稳定性和多样性的要求。     

重质油稳定性的耗散粒子动力学模拟

重质油的稳定性关乎其开采、储运及加工过程安全。准确的重质油稳定性判定方法对重质油生产及加工过程具有重要指导意义,然而重质油稳定性的经验判定法存在一定的局限性。从理论层面建立重质油稳定性的判定方法将提高重质油稳定性的预测准确度,本文基于耗散粒子动力学方法（DPD）模拟了不同重质油体系分子的微观聚集态。模拟结果表明,重质油体系的沥青质聚集率与胶体不稳定指数（C.I.I.）及稳定性判定图的判定结果吻合,验证了模拟体系的准确性。在此基础上,基于DPD模拟结果对C.I.I.及稳定性判定图的局限性进行了讨论,提出了改进的稳定性判定图用于重油稳定的快速判定。提出的重质油稳定性判定方法有望用于实际工业过程。