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Before use, we need to wash the glass apparatus with excellent level of pure (1+1) nitric acid or hydrochloric acid soak a few hours, then use to ion water to clean them. 7. hydrofluoric acid method Some complex structure, special apparatus contamination with special "precious" dirt, after using the above method is still not clean, and then using dilute hydrofluoric acid treatment is very effective.
[2]Yuyu Xia editor, Chemistry Laboratory Manual [M], Beijing: Chemical Industry Press in Chinese. 2008:206.

Palladium Nanoparticles Modified N-type Epitaxial Silicon Electrode for Photocurrent Detection of Ascorbic Acid Huai-Xiang LI1,a, Heng LI 1,b, Qiong WU1,c, Wen-Sha XIA1,d 1College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, P.R.
Yuan, Facile synthesis of graphene hybrid tube-like structure for simultaneous detection of ascorbic acid, dopamine, uric acid and tryptophan, Anal.

This is due to the more the pore-forming agent, the greater the porosity, the smaller the structure of the skeleton, and the greater the shrinkage.
Journal of Physics and Chemistry of Solids, 2009, 70(1): 164-168

The chemical structure of capsules was analyzed by FTIR using Perkin Elmer Spectrum One, FTIR spectrometer.
Yang, Self-healing epoxy via epoxy–amine chemistry in dual hollow glass bubbles, Compos.

Surface Characteristics of Single Sisal Fiber and Interfacial Adhesion of Composites Linxin Zhong1, a, Xinwen Peng2,b, Junli Ren2, c, Runcang Sun1, d,* 1Institute of Biomass Chemistry and Technology, Beijing Forestry University, Beijing, 100083, China 2State Key Laboratory of Pulp and Paper Engineering, South China University of Technology Guangzhou, Guangdong, 510640, China alxzhong0611@163.com, bwenwenpeng1229@163.com, crenjunli@scut.edu.cn, d, *rcsun3@bjfu.edu.cn (Corresponding author) Keywords: Surface characteristics; Interfacial adhesion; Chlorine dioxide; Sisal fiber Abstract.
The surface of the untreated single sisal fiber was covered with a thin layer material with granular structure, resulting in less exposure of cellulose micro fibrils (Fig. 2(a)).

Study on the Properties of Poly (lactic acid)/Starch/Chitosan Blended Materials LIU Peng1, a, GU Caiqin2,b and ZENG Qingzhu3,c 1School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China aliu_peng@gzhu.edu.cn; bgcq86@163.com; cqingzhuzeng@yahoo.com.cn Keywords: PLA/starch/chitosan blended materials; Compatible properties; Mechanical properties; Abstract.
In addition, this biopolymer also presents interesting properties, such as biocompatible, excellent film-forming capacity, and gas and aroma barrier properties at dry conditions, which makes it a suitable material for designing food coatings and packaging structures [18].

Sergienko Institute of Chemistry of FEB RAS, 159 pr. 100-letiya Vladivostoka, Vladivostok 690022, Russia *e-mail: ayacks@mail.ru Keywords: primary lithium batteries, organic electrode materials, hydrolytic lignin.
Thermal analysis of F-4D suspension (Fig. 4a) showed that binder was characterized by exoeffect at 177 °С due to polymerization and structuring of polytetrafluoroethylene.

Composite Structures, 1996. 35(3): p. 263-269
Journal of Polymer Science Part A: Polymer Chemistry, 1991. 29(8): p. 1197-1202

The influence of gudron additive on the structure of the solid phase from the thermal decomposition of phosphogypsum.
Xiao Haiping,Zhou Junhu,Cao Xinyu, et al.Experiments and model of the decomposition of CaSO4 under CO atmosphere(in Chinese).Journal of Fuel Chemistry and Technology. 2005,33(2): 150-154

Theoretical and Experimental Study on the Falling-film Evaporator Applied to Mechanical Vapor Compression Weike Pang1, 2,a, Luwei Yang1,b, Zhentao Zhang1*,c 1Technical Institute of Physics and Chemistry, CAS, Beijing 100190, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China avke.bjut@yahoo.com.cn, blwyang2002@yahoo.com.cn,czzth1@163.com Keywords: falling-film evaporator, film thickness, heat resistance, heat-transfer coefficient Abstract: Based on a heat pump system of mechanical vapor recompression (MVR) designed and manufactured independently, the heat transfer performance of falling-film evaporator was measured by a combination way of theory analysis and experiment proving as the heat pump operated in practice.
Some structure of heat-transfer surface is redesigned to dispose of the inefficiency, such as umbrella-plate surfaces, dimple-plate surfaces and so on [4~5].