Extraction-chromatographic Separation of Microamount of Indium(Ⅲ) with DMH(MP) Resin and Its Analytical Application

The optimum conditions for extraction-chromatography using di-(l-methylheptyl) methylphosphonateresin to separate indium(Ⅲ) from its coexisting metal ions were studied. A procedure for extraction-chromatographic separation and spectrophotometric determination of indium has been developed. This proce-dure gives more clear-cut separation and higher accuracy and reproducibility than ordinarily used separationby solvent extraction with butyl acetate. Besides, it can be used to separate and determine cadmiumsimultaneously.     

Sensitizing Effect of Mixed Surfactants on the Colouration of Scandium(Ⅲ)with Phenylfluorone or Its Derivatives

In the presence of mixed micelle of a cationic and a nonionic surfactants,the reaction of scandium(Ⅲ)with phenylfluorone or its derivatives results in a very sensitive colouration:furthermore this chromophoricsystem tolerates the existence of a considerable amount of masking agents,so that many interfering ions can bemasked and its selectivity would be further improved.After studying the optimum conditions and main charac-ters of some similar systems,the system of Sc(Ⅲ)—Orthonitrophenyuorone—CetyltrimethylammoniumBromide(CTMAB)—Triton X-200 is chosen for the spectrophotometric determination of microamount ofscandium.The proposed method shows not only high sensitivity(with a molar absorptivity of 2.12×1~sLmol~(-1)·cm~(-1))and selectivity,but also high tolerance of chromophoric conditions.Beer's law is obeyed over arange of 0～6.0 μg Sc/25ml.If the dual-wavelength method is applied,a much higher molar absorptivity o|"3.04×10~5L·mol~(-1)·cm~(-1)than those of other systems ever reported in the literatures can be attained:more-over.its linear range is extended to 0～8.0 μg Sc/25ml and its reproducibility is also improved.     

Fluorescence Enhancing Effect of OP on Ga(Ⅲ)-ECBBR system and its Analytical Application

The use of gallics compounds in the electronic industry and nuclear technology, as well astheir anti-tUInour activity and toxicity, indicatesthat more sensitive and reliable methods for determining trace amokes ofgallium are required.Some methods have been used for determination of gallium in various samples. Whereas themethods NAA, AAS need highly expensive instrUments, electrochemistry methods have beensuggested to determine gallium.Spectrophometric and fluorimetric methods[l--5] have be…     

Fluorescence Enhancem ent by Gadoliniu m ( Ⅲ) for Com plex of Europiu m ( Ⅲ) with T T Aand T S Aand its Analytical Application

１ＩｎｔｒｏｄｕｃｔｉｏｎＤｅｎｄｒｉｍｅｒｌｉｇａｎｄｓａｒｅａｓｏｒｔｏｆｉｍｐｏｒｔａｎｔｐｏｌｙｆｕｎｃｔｉｏｎａｌｃｏｍｐｌｅｘａｎｔｓｈａｖｉｎｇｈｉｇｈｌｙｏｒｄｅｒｌｙｓｐａｔｉａｌｓｔｒｕｃｔｕｒｅａｎｄｉｎｎｅｒｃａｖｉｔｉｅｓｗｉｔｈｄｅｆｉｎｉｔｅｓｉｚｅ,ａｎｄｉｔｈａｓｂｅｅｎｆｏｕｎｄｔｈａｔｔｈｅｙｈａｖｅｍａｎｙｐｏｔｅｎｔｉａｌａｐｐｌｉｃａｔｉｏｎｓ,ｓｕｃｈａｓｍｏｌｅｃｕｌｅｒｅｃｏｇｎｉｔｉｏｎａｇｅｎｔｓ,ｈｉｇｈｌｙｅｆｆｅｃｔｉｖｅｅｘ…     

Separation of indium(Ⅲ),gallium(Ⅲ),and zinc(Ⅱ) with Levextrel resin containing di(2-ethylhexyl) phosphoric acid (CL-P204):Part Ⅱ.Mechanism and kinetics of adsorbing indium(Ⅲ)

The mechanism of adsorbing indium(Ⅲ) from sulfate solutions with CL-P204 Levextrel resin containing di(-2-ethylhexyl) phosphoric acid was examined by batch operation and infrared spectra. The results showed that the P204 adsorbed on the resin behaved in the similar way to solvent extraction except that it was as a monomer in resin adsorbing but in dimeric form in solvent extraction. Three factors including temperature, indium(Ⅲ) concentration of solution, and the size of resin particles which influence the In3 /H exchange on CL-P204 Levextrel resin were investigated by the modified limited batch technique in order to determine the kinetics of In3 /H exchange. It was found that the rate of ion exchange increased with the temperature and the concentration of solution increasing and with the size of the resin particles decreasing. According to the expression developed by Boyd et al, the controlling factor of In3 /H exchange on CL-P204 Levextrel resin was the diffusion through the resin particles. The     

The Property of Alkylthiophosphoric Cobalt and Separation of Co(Ⅱ) and Ni(Ⅱ)

ＴｈｅＰｒｏｐｅｒｔｙｏｆＡｌｋｙｌｔｈｉｏｐｈｏｓｐｈｏｒｉｃＣｏｂａｌｔａｎｄＳｅｐａｒａｔｉｏｎｏｆＣｏ（Ⅱ）ａｎｄＮｉ（Ⅱ）ＬｉｕＸｉｎｇｚｈｉａｎｄＸｕｅＨｏｎｇ（刘兴芝）（薛红）ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｌｉａｏｎｉｎｇ...     

Codepositon of Nanodiamonds with Chromium(Ⅲ)

This paper studied the dispersion of Detonation Nano-diamond(DND)in acid medium,then well dispersed DND suspension with different concentrations were added to the trivalent chromium electrolyte.The chromium and chromium-nanodiamond composite coatings were prepared by composite plating process.Scanning electron microscopy(SEM) confirmed the presence of composite coatings and Energy Dispersive X-ray Analysis(EDX)revealed the composition,the effect of coating time on microhardness of chromium coatings and chromium-nanodiamond coatings were disscussd.It is found that the addition of nanodiamond increases the microhardness of the coatings.When the concentration of DND in electrolyte is 2.0-3.0 g/L,the plating time is about 15-20 min,the maximum hardness is obtained.     

Equilibrium Diagram in the Presence of a Gaseous Phase and Its Application(Overview Part Ⅱ)

ＥｑｕｉｌｉｂｒｉｕｍＤｉａｇｒａｍｉｎｔｈｅＰｒｅｓｅｎｃｅｏｆａＧａｓｅｏｕｓＰｈａｓｅａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎ①（ＯｖｅｒｖｉｅｗＰａｒｔⅡ）ＤｕＡｉｌｉｎｇａｎｄＺｈａｎｇＨｅｍｉｎｇ（杜爱玲）（张鹤鸣）ＣｈｅｍｉｃａｌＥｎｇｉｎｅ...     

Synthesis and fluorescent properties in complexes of Eu(Ⅲ), Tb(Ⅲ), and Sm(Ⅲ) with β-diketone and 2,2'-bipyridine

Three new rare earth ternary complexes,RE(PB)3bpy (RE-Sm3+,Eu3+,and Tb3+),were synthesized by the reaction of 1-(p-phenylethynyl-phenyl)-1,3-butanedione (HPB) and 2,2'-bipyridine (bpy) with rare earth chloride REC13,respectively,in alcohol solution.The compositions were characterized by means of infrared (IR) spectra,chemical analysis,elemental analysis,and thermodynamic analysis.Luminescent properties of the three complexes were studied.At room temperature,under UV light excitation,the Sm3+,Eu3+,and Tb3+ complexes exhibit characteristic emission of the central ions.The fluorescence spectra show that the fluorescence emission intensity of Eu3+ complex is the strongest.The narrow strongest emission band of Eu3+ complex is considered to be a valuable material with bright red fluorescence.     

Separation of indium(Ⅲ),gallium (Ⅲ),and zinc(Ⅱ)with Levextrel resin containing di(2-ethylhexyl)phosphoric acid(CL-P204):Part Ⅰ. Selection of separation conditions

A kind of Levextrel resin separation process was developed for separation of indium (Ⅲ), gallium (Ⅲ), and zinc (Ⅱ) from aqueous sulfate solution with Levextrel resin containing di(2-ethylhexyl) phosphoric acid (CL-P204). The aim of the research is to collect preliminary results for a pilot-scale production. Properties of adsorbing indium (Ⅲ), gallium (Ⅲ),and zinc (Ⅱ) from sulfate solution with the Levextrel resin were first studied by batch operation and column operation. The optimum pH, adsorption capacities and concentrations of stripping agents for indium (Ⅲ), gallim (Ⅲ) were tested. The separation order of indium (Ⅲ), gallim (Ⅲ), and zinc (Ⅱ) from sulfate solution with CL-P204 Levextrel resin was found that indium (Ⅲ) could be first separated by adsorbing at the acidity of 1.0 mol/L whereas gallium (Ⅲ) and zinc (Ⅱ) could not, and they were adsorbed together by adsorbing at pH = 2.8, then separated from each other by stripping with 0.1 and 0.5mol/L hydrochloric acid, respectively. The recoveries of three metal ions were all higher than 99%. The cyclic properties of this resin are well.     

Separation of indium (Ⅲ), gallium (Ⅲ), and zinc (Ⅱ) with Levextrel resin containing di(2-ethylhexyl) phosphoric acid (CL-P204): Part I. Selection of separation conditions

A kind of Levextrel resin separation process was developed for separation of indium (Ⅲ), gallium (Ⅲ), and zinc (Ⅱ) from aqueous sulfate solution with Levextrel resin containing di(2-ethylhexyl) phosphoric acid (CL-P204). The aim of the research is to collect preliminary results for a pilot-scale production. Properties of adsorbing indium (Ⅲ), gallium (Ⅲ), and zinc (Ⅱ) from sulfate solution with the Levextrel resin were first studied by batch operation and column operation. The optimum pH, adsorption capacities and concentrations of stripping agents for indium (Ⅲ), gallium (Ⅲ) were tested. The separation order of indium (Ⅲ), gallium (Ⅲ), and zinc (Ⅱ) from sulfate solution with CL-P204 Levextrel resin was found that indium (Ⅲ) could be first separated by adsorbing at the acidity of 1.0 mol/L whereas gallium (Ⅲ) and zinc (Ⅱ) could not, and they were adsorbed together by adsorbing at pH = 2.8, then separated from each other by stripping with 0.1 and 0.5 mol/L hydrochloric acid, respectively. T     

Equilibrium Diagram in the Presence of a Gaseous Phase and Its Application(Overview Part Ⅰ)

ＥｑｕｉｌｉｂｒｉｕｍＤｉａｇｒａｍｉｎｔｈｅＰｒｅｓｅｎｃｅｏｆａＧａｓｅｏｕｓＰｈａｓｅａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎ①（ＯｖｅｒｖｉｅｗＰａｒｔⅠ）ＺｈａｎｇＨｅｍｉｎｇａｎｄＤｕＡｉｌｉｎｇ（张鹤鸣）（杜爱玲）ＣｈｅｍｉｃａｌＥｎｇｉｎｅ...     

HEH/EHP和伯胺N_(1923)萃取Zn(II)的协同与反协同效应SCIEI

研究了HEH/EHP(HA)和伯胺N_(1923)盐酸盐(RNH_3C1)的正庚烷溶液从HC1介质中对Zn(Ⅱ)的萃取。发现当以RNH_3Cl为主体萃取剂时,添加HA有利于对Zn(Ⅱ)的萃取;当以HA为主体萃取剂时,添加RNH_3C1则抑制了对Zn(Ⅱ)的萃取。考察了温度对协萃平衡的影响,并计算了体系的热力学函数。     

Experimental Study of Microstructure Evolution during Tempering of Quenched Steel and Its Application

LARGE-SIZED FORGINGS are usually intensivelyquenched to obtain the desired microstructuredistribution,high strength and hardness.Becauseresidual stresses are high in quenched large-sizedforgings,tempering processes follow quenchingprocesses to reduce the residual stress and obtain goodmechanical properties.Several differentmicrostructures are generated in quenched steelforgings,such as martensite,bainite and retainedaustenite.Modeling of microstructure evolution inquenched steel during …     

Investigation on the syntheses and structures of Y~(Ⅲ) complexes with ami-nopolycarboxylic acids (Ⅳ)

This paper deals with the structure of the YIII complex with aminopolycarboxylic acids, synthesis and structural determination of the complex (NH4)[YIII(edta)(H2O)3]·3H2O (edta = ethylenediaminetetraacetic acid). The crystal and molecular structures of the (NH4)[YIII(edta)(H2O)3]·3H2O complex have been determined by single-crystal X-ray structure analysis. The crystal of the complex (NH4)[YIII(edta)(H2O)3]·3H2O belongs to orthorhombic crystal system and fdd2 space group. The crystal data are as follows: a=1.944 1(9) nm, b= 3.545 9(18) nm, c = 1.219 6(6) nm, V= 8.407 (7)nm3,Z=16, Mr= 503.25, Dc= 1.590g.cm3, μ= 2.844 mm 1 and F(000) = 4 160. The final R and Ru are 0.048 6 and 0.133 2 for 3 388 (I>2σ(I)) unique reflections, respectively. The complex anion [YIII(edta)(H2O)3] has a pseudo-mono-capped square antiprismatic nine-coordinate structure in which the six coordinate atoms (two N and four O) are from an edta ligand and three water molecules coordinate to the central YIII ion directly. From the res     

Extraction and separation of Ga(Ⅲ) and T1(Ⅰ) or In(Ⅲ) and T1(Ⅰ) from chloride media with CA-12 in sulphonating kerosene

The extraction behavior and mechanism of gallium(Ⅲ) and thallium(Ⅰ) or indium(Ⅲ) and thallium(Ⅰ) with Sec-octylphenoxy acetic acid (CA-12) from hydrochloric acid solution in sulphonating kerosene were studied. Optimum extraction conditions were evaluated from critical study of various experimental parameters and the probable composition of the extracted species is ascertained from lg D-lg C plots. The effects of different ions on the determination of these ions were examined.     

Polarographic Behavior of PMBP and Its Complexes with Rare Earth

ＰｏｌａｒｏｇｒａｐｈｉｃＢｅｈａｖｉｏｒｏｆＰＭＢＰａｎｄＩｔｓＣｏｍｐｌｅｘｅｓｗｉｔｈＲａｒｅＥａｒｔｈＫａｎｇＪｉｎｇｗａｎ；ＨｅＹｕｆｅｎｇ；ＧａｏＪｉｎｚｈａｎｇａｎｄＢａｉＧｕａｎｇｂｉ（康敬万）（何玉凤）（高锦章）（白光弼）（Ｉｎｓｔ...     

Electroreduction of Co(Ⅱ),Ni(Ⅱ) and Co-deposition with La(Ⅲ) in urea-NaBr Melt

1 ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｆｉｌｍｓｏｆｒａｒｅｅａｒｔｈ ｉｒｏｎｇｒｏｕｐａｌ ｌｏｙｓｒｉｖｅｔｅｄｍｕｃｈａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｏｆｔｈｅｉｒｆｕｎｃｔｉｏｎａｌｐｅｒｆｏｒｍａｎｃｅｓ(ｅ .ｇ .ｔｈｅｍａｇｎｅｔ ｉｃ ,ｍａｇｎｅｔｏ ｏｐｔｉｃａｌａｎｄｈｙｄｒｏｇｅｎｓｔｏｒａｇｅｐｅｒｆｏｒｍａｎｃｅｓ) .Ｓｏｆａｒ ,ｔｈｅｓｅｆｉｌｍｓａｒｅｐｒｏ ｄｕｃｅｄｂｙｓｐｕｔｔｅｒｉｎｇｏｒｖａｃｕｕｍｐｌａｔｉｎｇ .Ｅｌｅｃｔｒｏｄｅｐｏｓｉｔｉｏｎｏｆｒａｒｅｅａｒｔ…     

Electroreduction of Co(Ⅱ) and La(Ⅲ)in UreaMelt

ＥｌｅｃｔｒｏｒｅｄｕｃｔｉｏｎｏｆＣｏ（Ⅱ）ａｎｄＬａ（Ⅲ）ｉｎＵｒｅａＭｅｌｔＹａｎｇＱｑｉｎ，ＱｉｕＫａｉｒｏｎｇａｎｄＰａｎＳｈｉｊｉａｎ（杨绮琴）（丘开容）（潘仕健）ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｏｎｇｓｈａｎＵｎｉｃｕｅ...