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锌Ⅱ-硫氰酸钾-中性红体系双波长光度法测定痕量锌李人宇1,卢洋1,李咏梅2(1.江苏省连云港市连云港师范高等专科学校2.淮海工学院 化学工程学院,江苏连云港 222005)摘 要:建立了测定痕量锌的双波长光度法.在阿拉伯树胶存在下和pH 5.7 HAc-NaAc缓冲溶液中,ZnⅡ与硫氰酸钾,中性红(NR)反应生成稳定的离子缔合物[NR]4[Zn(SCN)6],使NR褪色,在462 nm波长处出现正吸收峰,在574 nm处出现负吸收峰,实验选定测定波长为462 nm,参比波长为574 nm.表观摩尔吸光系数为5.......
Trans. Nonferrous Met. Soc. China 25(2015) 2081-2086 Hydrothermal synthesis of silver nanoparticles in Arabic gum aqueous solutions Ying-fen LI, Wei-ping GAN, Jian ZHOU, Zhi-qiang LU, Chao YANG, Tian... synthesized via the hydrothermal method. Arabic gum (AG) was used as both the reductant and steric stabilizer without any other surfactant. By adjusting the reaction temperature, mass ratio of AG......
, Changsha 410083, China Received 2 June 2016; accepted 24 October 2017 Abstract: The ultrafine silver powders were prepared by liquid reduction method using Arabic gum as dispersant. The effects of different dispersants, pH values, and temperature on the morphology and particle size of silver powders were investigated. It is found that Arabic gum can better adsorb on silver particles via chemical......
The selective effect of food-grade guar gum on chalcopyrite-monoclinic pyrrhotite separation using mixed aerofloat(CSU11) as collectorXiong Chen1,Guo-hua Gu1,Li-juan Li1,Ren-feng Zhu1,21. School... monoclinic pyrrhotite using food-grade guar gum(FGG) as a depressant was studied through flotation tests, kinetic studies, dynamic potential measurements, adsorption experiments, and infrared spectral......
J. Cent. South Univ. Technol. (2008) 15(s1): 516-519 DOI: 10.1007/s11771-008-412-1 Rheology and influence factor of low-concentration Konjac gum solutions WANG Yuan-lan(王元兰), LI Zhong-hai(李忠海), WEI Yu(魏 玉) (School of Science, Central South University of Forestry and Technology, Changsha 410004, China) Abstract: Rheological properties of low-concentration Konjac gum and impacts......
J. Cent. South Univ. Technol. (2008) 15(s1): 509-515 DOI: 10.1007/s11771-008-411-2 Rheological properties in supernatant of peach gum from almond (Prunus dulcis) WANG Sen(王 森)1, XIE Bi-xia(谢碧霞... and Development Center, CAF, Zhengzhou 450003, China) Abstract: The rheological properties in the supernatant of peach gum from Prunnus dulcis were discussed in order to provide more scientific technical......
Selective depression behavior of guar gum on talc-type scheelite flotationYong-zhong Zhang1,2,Guo-hua Gu3,Xiang-bin Wu1,Kai-le Zhao31. School of Geosciences and Info-Physics, Central South... behavior and mechanism of guar gum on talc-type scheelite flotation were systematically investigated by flotation experiments, adsorption tests, zeta-potential measurements, and infrared spectroscopic......
The Competitive Adsorption Characteristics of Welan Gum and Superplasticizer in Cement Mortar赵青林1,2,ZHANG Yulin1,2,LIU Ciqi1,2,ZENG Luping1,2,CHEN Shihua21. State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology2. School of Materials Science and Engineering,Wuhan University of Technology摘 要:Welan gum has been widely......
Microstructural softening induced adiabatic shear banding in Ti-23Nb-0.7Ta-2Zr-O gum metalSilu Liu1,Y.Z.Guo2,Z.L.Pan3,X.Z.Liao4,E.J.Lavernia5,Y.T.Zhu6,1,Q.M.Wei3,Yonghao Zhao11. Nano..., University of California6. Department of Materials Science and Engineering, North Carolina State University摘 要:Ti-23Nb-0.7Ta-2Zr-O gum metal(GM) is an attractive......
Effect of Delay Released Welan Gum on the Performance of Cement Mortar赵青林1,2,LIU Ciqi2,3,QU Chengjie1,2,ZENG Luping1,21. State Key Laboratory of Silicate Materials for Architecture, Wuhan University...">Welan gum is widely applied in environmental admixtures due to its good thickening and rheological properties. With its powerful charge density in the molecular structure, the competitive adsorption......