Device and method used for measuring density of trace amount of volatile liquid

A technology for measuring volatile liquids and density, applied in measuring devices, specific gravity measurement, instruments, etc., to achieve the effect of improving volume measurement accuracy, mass weighing accuracy, and calculation accuracy

Inactive Publication Date: 2017-10-20
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small volume of trace volatile liquids, which can reach the microliter level and are volatile, conventional methods cannot be used for measurement

Method used

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  • Device and method used for measuring density of trace amount of volatile liquid
  • Device and method used for measuring density of trace amount of volatile liquid
  • Device and method used for measuring density of trace amount of volatile liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 One of the structural schematic diagrams of a micro-volatility liquid density measuring device provided by the embodiment of the present invention when performing density measurement; figure 2 It is a schematic diagram of the structure of a micro-volatility liquid density measuring device provided in the embodiment of the present invention when drying the gas-phase sampling vial.

[0041] like figure 1 and figure 2 As shown, a kind of trace volatile liquid density measuring device that present embodiment provides, it comprises gas-phase sampling bottle 1, desiccator 2, analytical balance 3, micro-sampler 4 and master control device 5; Said gas-phase sampling Bottle 1 is used to hold the volatile liquid to be measured, and it comprises sampling bottle body 11, septum 12 and bottle cap 13, and described bottle cap 13 is fixed on the bottleneck place of sampling bottle body 11, and described septum The pad 12 is arranged in the bottle cap 13; the dryer 2 is u...

Embodiment 2

[0048] figure 2A schematic diagram of the structure of a micro-volatility liquid density measuring device provided in the embodiment of the present invention when drying the gas-phase sampling bottle; image 3 It is another structural schematic diagram of a micro-volatility liquid density measuring device provided in an embodiment of the present invention when performing density measurement.

[0049] like figure 2 and image 3 As shown, a kind of trace volatile liquid density measuring device that present embodiment provides, it comprises gas-phase sampling bottle 1, desiccator 2, analytical balance 3, micro-sampling device and main control device 5; Said gas-phase sampling bottle 1 is used to contain the volatile liquid to be measured, and it includes a sampling bottle body 11, a septum 12 and a bottle cap 13, and the bottle cap 13 is fixed at the mouth of the sampling bottle body 11, and the septum 12 is set in the bottle cap 13; the dryer 2 is used to dry the gas-phase...

Embodiment 3

[0054] Figure 4 A flow chart of a method for measuring the density of a trace volatile liquid provided by an embodiment of the present invention.

[0055] like Figure 4 As shown, a kind of trace volatile liquid density measuring method that present embodiment provides, it comprises the following steps:

[0056] Step 1, place the sampling bottle body, septum and bottle cap of the gas-phase sampling bottle in a desiccator to dry to constant weight, and tighten the bottle cap on the sampling bottle body after putting the septum;

[0057] Step 2, use an analytical balance with a weighing level of at least one hundred thousandth or more to weigh the initial mass m0 of the gas phase sampling vial;

[0058] Step 3, using a micro-injection device to inject the measured volatile liquid with a volume of V into the gas-phase sampling bottle;

[0059] Step 4, using the analytical balance used in step 2 to weigh the mass m1 of the gas phase sampling bottle after injecting the volatile...

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PUM

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Abstract

The invention discloses a device and a method used for measuring the density of a trace amount of volatile liquid. The device comprises a gas phase sample introduction bottle, a drier, an analytical balance, a trace amount sample introduction device, and a master control device; the gas phase sample introduction bottle is used for storing the volatile liquid to be measured; the drier is used for drying the gas phase sample introduction bottle; the analytical balance is used for weighing the gas phase sample introduction bottle before and after storing of the volatile liquid to be measured; the trace amount sample introduction device is used for injecting the volatile liquid to be measured into the gas phase sample introduction bottle; the master control device is used for calculating the density of the volatile liquid to be measured. The device and the method can be used for measuring the density of the trace amount of the volatile liquid accurately.

Description

technical field [0001] The invention relates to the technical field of liquid density measurement, in particular to a device and method for measuring the density of a trace volatile liquid. Background technique [0002] There are conventional method, density bottle method, density meter method, buoyancy method and float method etc. for measuring liquid density. These methods are suitable for measuring the density of a large number of non-volatile liquids. However, these methods cannot be used to measure liquid density when the amount of liquid is small or the liquid is volatile. [0003] In the laboratory, it is sometimes necessary to measure the density of trace volatile liquids under laboratory temperature and pressure conditions for experimental calculations. Due to the small volume of trace volatile liquids, reaching the level of microliters, and their volatility, conventional methods cannot be used for measurement. [0004] Therefore, it is necessary to study an effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/00
CPCG01N9/00
Inventor 巩泉泉谢连科王坤窦丹丹马新刚刘辉臧玉魏张国英尹建光许立国张永张兆波陈超
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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