煤矸石中微量钪的分光光度法测定

在 (CH2 ) 6 N4 HCl缓冲溶液中 ,研究了微量钪 (Ⅲ ) 埃铬菁R(ECR) 溴化十六烷基吡啶 (CPB)之间的配合反应。结果表明 ,在pH 6.0的(CH2 ) 6 N4 HCl缓冲溶液中和OP乳化剂的存在下 ,有色溶液的最大吸收波长为 60 0nm ,表观摩尔吸光系数为 2 .0× 10 5L·mol- 1 ·cm- 1 。钪 (Ⅲ )的质量浓度在 0～ 0 .2 0 μg·ml- 1 范围内符合比耳定律 ,钪 (Ⅲ )的加标回收率在 97.2 %～ 10 4.1%之间 ,RSD(n =6)为 2 .9%～ 6.1%。结合PMBP 甲苯萃取分离 ,测定了煤矸石中的微量钪     

阴离子树脂萃取富集-埃铬青R光度法测定赤泥中痕量钪

在pH 6.0的HAc-NaAc缓冲溶液中和溴化十六烷基吡啶（CPB）和乳化剂OP存在下,埃铬青R（ECR）与钪（Ⅲ）反应生成摩尔比为2∶1的稳定络合物。该络合物被717型阴离子树脂交换柱萃取富集后,用分光光度法测定树脂相中的钪,建立了测定钪的光度分析新方法。吸附络合物树脂相的最大吸收波长为600 nm,表观摩尔吸光系数为2.03×105 L·mol-1·cm-1,钪的质量浓度在0~200 μg/L范围内符合比尔定律。经阴离子树脂交换柱萃取富集后,钪的测定灵敏度可提高数倍,大多数常见离子不干扰测定。方法应用于铝厂赤泥中痕量钪的测定,相对标准偏差小于2%,加标回收率在98%~102%之间,测定结果同ICP-AES法的结果相一致。     

表面活性剂对稀土与偶氮氯膦-mK显色反应的影响及其应用

研究了溴化十六烷基三甲基铵、十二烷基磺酸钠、吐温 80、乳化剂OP和聚乙烯醇 5种表面活性剂对稀土与偶氮氯膦 mK显色反应的影响。结果表明 :乳化剂OP、吐温 80和聚乙烯醇对显色反应有增敏作用 ,其中吐温 80效果最为显著。在 0. 0 2～ 0.0 8mol/L硫酸介质中和吐温 80存在下 ,Ce 与偶氮氯膦 mK生成稳定的蓝绿色络合物 ,最大吸收波长为 668nm ,表观摩尔吸光系数ε =9.1× 10 4 。用此显色体系测定低合金钢中稀土 ,结果满意     

4-羧基苯偶氮硫代若丹宁固相萃取光度法测定金的研究

研究了4 -羧基苯偶氮硫代若丹宁(CPATR)与金的显色反应。在盐酸介质中,乳化剂-OP存在下,CPATR与金反应生成2∶1稳定络合物。络合物的λmax =5 0 5nm ,ε=8.12×10 4 L/ (mol·cm) ,金的质量浓度在0～2 0 μg/ 10ml内符合比尔定律。矿石样品中的金用TBP萃淋树脂固相萃取柱分离和富集后,采用该方法测定。该方法相对标准偏差在2 .4 %～2 .8%之间,加入标准回收率在92 %～10 3%之间,结果令人满意。     

1-[(2,3,4-三羟基苯)偶氮]-4-苯甲酸光度法测定浮法玻璃下表面渗锡量

研究了新试剂 1 [(2 ,3 ,4 三羟基苯 )偶氮 ] 4 苯甲酸与锡的反应条件。在 0 2mol/L盐酸介质中 ,当乳化剂OP存在时 ,锡与试剂形成棕红色络合物 ,最大吸收波长在 482nm ,表观摩尔吸光系数为 2 86× 10 4 ,锡的浓度在 0～ 60 μg/ 2 5mL范围内符合比尔定律。反应选择性好 ,可不经分离直接测定浮法玻璃下表面渗锡量     

6-氯-苯并噻唑偶氮苯甲酸光度法测定粉煤灰中痕量铜Ⅱ

研究了6-氯-苯并噻唑偶氮苯甲酸(6-Cl-BTAEB)与铜Ⅱ的显色反应,建立了分光光度法测定痕量铜Ⅱ的新方法。在pH4.0的HAc-NaAc缓冲溶液中,乳化剂OP存在下,6-Cl-BTAEB与Cu(反应生成2∶1稳定络合物,其最大吸收波长为650 nm,表观摩尔吸光系数为7.35×104L.mol-1.cm-1。铜含量在0～400μg/L内符合比尔定律,方法用于测定粉煤灰中痕量铜Ⅱ,结果与原子吸收光谱法相符,6次测定值RSD<4%。     

5-(苯基偶氮)-8-[(对硝基苯偶氮)氨基]喹啉的合成及其分析应用研究

合成了新试剂 5- (苯基偶氮 ) - 8- [(对硝基苯偶氮 )氨基 ]喹啉 (PNPAQ) ,其结构经红外光谱和元素分析证实。研究了乳化剂OP存在下 ,试剂与钯的显色反应。在碱性介质中 ,PNPAQ与钯 (Ⅱ )形成 2∶1蓝色络合物 ,其最大吸收峰位于波长 640nm处 ,摩尔吸光系数为 1 1× 10 5L/(mol·cm)。钯的质量浓度在 0～ 15μg/2 5ml范围内符合比尔定律。该方法用于催化剂中微量钯的测定 ,结果令人满意     

示波极谱法快速测定锌电解液中痕量钴

研究了在HAc -NaAc -NH4 Cl-柠檬酸钠 -丁二酮肟 -乳化剂OP体系中 ,用示波极谱法测定锌电解液中的痕量钴。试验发现 ,加入适量的乳化剂OP ,可使锌波峰电位向负方向移动 ,而对钴波峰电位几乎无影响 ,大大减弱了锌波对钴波的干扰。Co -丁二酮肟 (DMG)络合物在 -0 .93V (vs.SCE)处 ,产生一灵敏的络合吸附波。钴浓度在 0 .0 0 16～ 0 .1μg/mL时 ,与峰电流有良好的线性关系 ,其检出限为 1.2× 10 - 6 μg/mL。将本法应用于锌电解液中痕量钴的     

导数分光光度法测定铝及铝合金中微量锰的研究

研究了利用 5 Br PADAP作显色剂 ,乳化剂OP作增溶增敏剂 ,导数分光光度法测定铝及铝合金中微量锰的适宜条件。经对纯铝及铝合金国家标准样品进行分析 ,相对标准偏差RSD≤ 1 2 % (0.0 0 0 4 %Mn) ,标准加入回收率在 97%～ 1 0 3%之间。     

水杨醛缩-5-碘-8-氨基喹啉萃取光度法测定水中痕量铝

研究了水杨醛缩-5-碘-8-氨基喹啉(SAIAQ)与铝的显色反应,并建立了水中痕量铝的分光光度测定方法。在pH 4.0的HAc-NaAc缓冲溶液中,在乳化剂OP-10存在下,SAIAQ与铝反应生成组成比为2比1稳定配合物。配合物最大吸收波长为450 nm,表观摩尔吸光系数为2.75×10⁵ L·mol^-1·cm^-1,铝质量浓度在0～260 μg/L的范围内符合比尔定律。采用CCl₄萃取能使铝与水中大量常见元素分离。方法已用于水中痕量铝的测定,测定结果与催化光度法的测定结果相符。6次测定管网水样品中铝的相对标准偏差小于1%,加标回收率在98.6%～104.0%之间。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<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     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

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,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

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     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

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     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

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,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

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.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

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.