准气体简介(国外英文资料).docVIP

准气体简介(国外英文资料) Prospective gas introduction standard gas can also be used for environmental monitoring, measuring toxic organic matter, vehicle emission test gas, BTU gas measurement, liquefied petroleum gas calibration standards, supercritical fluid technology, etc. The standard gas group fraction is divided into two, three and multiple standard gases. The requirements of the distribution of air and gas are characterized by the tolerance and analysis tolerance. There is a standard for SE2MI distribution, but all companies have corporate standards. The minimum concentration of the component is 10, and the group score can be up to 20. The method can adopt the weight method, then use chromatographic analysis to analyze the school nucleus, also can be passed by the standard transfer procedure. The standard gas classification standard gas is divided into two, three and multiple standard gases. To edit the function of the standard gas of this segment and establish the traceability of measurement Ensure accurate and consistent measurement results Carry out the passing of the value Promote the development of measurement technology and quality supervision The purpose of this standard gas is to be used for the quality control of gas products The calibration and calibration of instrument instruments 3, for atmospheric pollution monitoring 4, for medical and clinical testing 5, for building home environment monitoring The preparation method of the standard gas gas in this section is one, weighing method 1, scope of application Weighing method is recommended by the international organization for standardization, it is only applicable to components, components and the cylinder wall gas reaction does not occur, and under the experimental condition can be wholly at gas condensate components. 2, the required equipment Distribution equipment: vacuum pump, vacuum gauge, high, low pressure gauge, valve, gas bottle fixture, case. Weighing equipment: high precision balance Second, the os