锶与二溴对甲偶氮羧显色反应的研究及其分析应用

研究了二溴对甲偶氮羧与锶（Ⅱ）的显色反应,考察了反应条件和分析特性。在Ｈ_３ＢＯ_３-Ｎａ_２Ｂ_４Ｏ_７缓冲溶液中,试剂与 Ｓｒ~(２＋)形成２：１的络合物,在 ６２０ｎｍ处的摩尔吸光系数 ε＝１．８９×１０~４。 Ｓｒ~(２＋)量在 ０．２５—１．２５μｇ／ｍＬ范围内,服从比尔定律。设计了测定铁氧体样品中锶的新方法,结果满意。     

罗丹明B-高碘酸钾体系催化光度法测定痕量锰(Ⅱ)

研究了在ｐＨ２．７的Ｈ_３ＰＯ_４－ＫＨ_２ＰＯ_４介质中,锰（Ⅱ）催化高碘酸钾氧化罗丹明Ｂ的反应,探讨了反应机理及动力学条件,建立了高选择性催化动力学光度法测定痕量锰（Ⅱ）的新方法．线性范围为 ０— ０．５μｇ／２５ｍＬ,方法检出限为４．８Ｘ１０~－１０ｇ／ｍＬ,用于人发和水样中痕量锰（Ⅱ）的测定,结果满意．     

DBF－偶氮氯膦与锶显色反应的研究及应用

本文研究了新显色剂ＤＢＦ－偶氮氯膦与锶的显色反应。在１．２ｍｏｌ／ＬＨＣＬ介质中试剂与锶反应形成１：２的蓝色配合物,其最大吸收峰在６３０ｎｍ波长处,表现摩尔吸光系数为５．０×１０￣４Ｌ·ｍｏｌ￣－１·ｃｍ￣－１,锶量在０￣１４μｇ／２５ｍｌ范围内符合比尔定律。方法用于锶硅铁合金中锶的直接光度测定获得了满意结果。     

MnO2·xH2O共沉淀分离5—Br—PADAP—OP水相光度法测定Cu部的Sb

基于ＨＮＯ２介质中ＭｎＯ２·ｘＨ２Ｏ能分离富集锑继而利用Ｓｂ（Ⅲ）与ＫＩ的铬阴离子［ＳｂＩ４］＾－在１．１￣１．８ｍｏｌ／Ｌ的Ｈ２ＳＯ４介质中与偶氮类显色剂５－Ｂｒ－ＰＡＤＡＰ形成的离子缔合物，在乳化剂ＯＰ存在下，有较高灵敏度与选择性，可不经萃取分离水相光度法测定Ｃｕ中锑。线性范围０￣４０μｇ／２５ｍＬ，ε６１０＝４．３×１０＾４。     

催化动力学光度法测定痕量铁(Ⅲ)的研究

研究了在Ｈ２ＳＯ４介质中,Ｆｅ（Ⅲ）催化Ｈ２Ｏ２氧化偶氮胂Ｍ的褪色反应的动力学条件,建立了催化动力学光度法测定痕量铁的新方法。方法的线性范围为０～２．２μｇ／２５ｍｌ,检测限为１．９×１０－１０ｇ／ｍｌ。在用于测定分析纯盐酸和硝权中的痕量铁时,结果满意。     

新试剂1,4-双肼酞嗪与镍显色反应的研究及应用

在ｐＨ８～９的ＮＨ_３·Ｈ_２Ｏ－ＮＨ_４Ｃｌ缓冲溶液中,有氯化十六烷基吡啶（ＣＰＣ）存在下,新显色剂１,４－双肼酞嗪（ＤＨＰＨ）与镍形成稳定的１：１蓝绿色水溶性络合物．其最大吸收波长λ_ｍａｘ＝６９０ｎｍ,表观摩尔吸光系数ε=２．１５Ｘ１０ ~４镍量在０～ ５６μｇ／２５ｍＬ范围内服从比尔定律,本方法操作简便快速,结果稳定,选择性好,已用于铝合金中痕量镍的测定,结果满意．     

氧化酸性铬蓝K褪色分光光度法测定微量铈

Ｃｅ（Ⅳ）对酸性铬蓝Ｋ有褪色作用,本文借此进行分光光度法测定铈的研究。实验表明,在１．４～２．５ｍｏｌ／ＬＨ＿２ＳＯ＿４介质中,有色溶液的最大吸收波长为５２０ｎｍ,铈量在６～１００μｇ／２５ｍｌ范围内与有色溶液吸光度的减少值成线性关系。方法简单、快速、准确,选择性好。用于测定稀土氧化物中铈,结果满意。     

铬的价态光度测定法的研究

在０．０２５～０．６ｍｏｌ／ＬＨ_２ＳＯ_４溶液中，Ｃｒ（Ⅵ）萃入Ｎ－２３５甲苯有机相后，二苯偕肼直接显色，其最大吸收峰为５６０ｎｍ，表观摩尔吸光系数为２．４×１０￣４，铬含量在０．５～２０μｇ／５ｍＬ范围内符合比尔定律，回收率为９８％～１０２％，该法满意地用于电镀和铬盐工业废水中Ｃｒ（Ⅵ）和Ｃｒ（Ⅲ）的测定。     

P204萃取分离ICP-AES法测定CeO_2标准物质中La,Pr,Nd,Sm,Gd和Y

采用ＨＮＯ_３和Ｈ_２Ｏ_２一溶解试样,在８ｍｏｌ／ＬＨＮＯ_３介质中,以溴酸钾将Ｃｅ（Ⅲ）氧化成Ｃｅ（Ⅳ）,继以Ｐ２０４／ＣＣｌ_４萃取Ｃｅ（Ⅳ）,将三价稀土元素与四价体分离,用ＩＣＰ—ＡＥＳ法测定ＣｅＯ_２标准物质中Ｌａ,Ｐｒ．Ｎｄ,Ｓｍ,Ｇｄ和Ｙ,分析结果均落在标准值的置信区问内,ＲＳＤ＜６％．     

4-(5-氯-2-吡啶偶氮)-1,3-二氨基苯显色树脂相分光光度法测定痕量Cu(Ⅱ)

在ｐＨ４．７ 酸性介质中,Ｃｕ（Ⅱ）与４－（５－氧－２－吡啶偶氮）－１,３－二氨基苯生成有色络合物,与强酸性阳离子交换树脂交换吸附,可进行树脂相分光光度法测定痕Ｃｕ（Ⅱ）．最大吸收波长λ_ｍａｘ＝５００ｍｍ,表观摩尔吸光系数８＝２．８ｘ１０~５,Ｃｕ（Ⅱ）量在０～９μｇ／２５ｍＬ范围内符合比尔定律．用此法测定水样中痕量Ｃｕ（Ⅱ）,结果令人满意．     

Journal of Rare Earths Contents List of Vol.32(2014)

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Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

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Refined Copper Production by Province or City in 2014

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Aluminium Production by Province or City in 2014

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China is Planning to Raise rare Earth Resource Tax Again

正In the face of the current situation of the lost WTO dispute on rare earth,and cancellation of export tariff for partial rare earth products,efforts of regulation and integration on rare earth by the state government will again be tightened.Reporters of the Economic Information Daily recently learned from authoritative sources that relevant ministries are     

Fabricated Copper Production by Province or City in 2014

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Refined Copper Production by Province or City in 2014

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Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in