Search results for keyword: quantitative
GB/T 9872-1988 Determination of bromine and chlorine in rubber and rubber products by oxygen cylinder combustion method
GB/T 9872-1988 Determination of Bromine and Chlorine Contents in Rubbers and Rubber Products by Oxygen Burning
1 Introduction
GB/T 9872-1988 [1] is a standard specifying a test method to determine the bromine and chlorine contents in rubbers and rubber products by oxygen burning, which was issu......
1017 
Sophie
GB 13580.4-92 Electrode Method for Determination of pH Value of Atmospheric Precipitation
Atmospheric Precipitation pH Determination by Electrode Method
Summary
This paper presents the fundamentals, principle and operation process of using an electrode method to analyze the pH of atmospheric precipitation. Precipitation pH is a critical environmental parameter reflecting the nature o......
GB/T4842-1995 pure argon technical indicators
GB/T4842-1995 Pure Argon Technical Index
Abstract: This standard specifies the technical requirements, test methods, inspection rules and signs, packaging, transportation and storage requirements for pure argon in China.
1 Scope of application
This standard specifies the technical requirements,......
GB/T7445-1995 pure hydrogen, high-purity hydrogen and ultra-pure hydrogen
GB/T 7445-1995 Hydrogen, High Purity Hydrogen and Ultra-high Purity Hydrogen
1 Scope
This standard specifies the requirements, sampling and chemical and physical testing of hydrogen, high purity hydrogen, and ultra-high purity hydrogen.
2 Normative References
The following documents are essent......
HRB spherical roller bearings
Roller bearings play a very important role in the operation of modern machinery and equipment. In particular, HRB bearings have been used in many fields and play an indispensable role. Next, lets have a brief introduction to HRB bearings.
HRB(Hefei Rolling Bearings Co., Ltd./Hefei Huari Rolling B......
Material Chemical Analysis
Sample Analysis of Material Chemistry
Coal gasification is the process of transforming coal from a solid or liquid form into a gaseous state. This process has been utilized, to varying degrees, since the late 1700s when it was discovered that heating coal to a high temperature would produce a com......
Preparation, Surface Modification and Application of Nano Zinc Oxide
Preparation, Surface Modification and Application of Nanometer Zinc Oxide
Abstract：
Nanometer zinc oxide (ZnO), a white powder with wide spectra of bandgap, has found numerous applications ranging from photodetectors to gas sensors. Owing to its versatile characters, remarkable structure and su......
Qualitative and quantitative analysis of chemical composition of plating bath
Qualitative and quantitative Analysis of Bath CoatingChemical Components
Abstract
Bath coating as a special composite coating has been widely used in automobile, ship and other industries. In this paper, the physical and chemical characteristics of the bath coating were studied by means of the p......
Defects and countermeasures of large forgings: shrinkage cavity and porosity
Defects and Countermeasures of Large Forgings
With the deepening of industrialization, rising labor costs and environmental pollution, large forgings have become an indispensable technology in the machinery manufacturing industry. Big forgings are often used in the manufacture of precision machin......
Modulus calculation for simple geometries during pouring
Modulus of Rigidity of Geometric Shapes
The modulus of rigidity or shear modulus, G, is defined as the ratio of shearing stress to the angular distortion of a material. It is a measure of the rigidity of a material and is used in various engineering contexts to calculate bending, airflow, and othe......
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