A method of based on resistance measurement concentration of hydrogen sulfide
Technical field
The present invention relates to a kind of methods based on resistance measurement concentration of hydrogen sulfide.
Background technology
It is related to occupational sulfurated hydrogen detection, refers to carrying out occupational in air of workplace to vulcanize
Hydrogen samples, and is then measured sample, obtains the concentration of hydrogen sulfide.
Occupational hydrogen sulfide in air of workplace at this stage is mainly carried out using silver nitrate colorimetic method
Detection.
Sample solution and placebo solution are carried out colorimetric by such method using optical colorimetry, the disadvantage is that
It is affected by factors such as ambient light illumination, the collimation errors, easily there is error, and accuracy is relatively low.
For these reasons, existing concentration of hydrogen sulfide detection method requires further improvement.
Invention content
It is an object of the invention to propose a kind of method based on resistance measurement concentration of hydrogen sulfide, this method is by measuring sample
The resistance of product solution, concentration of hydrogen sulfide when extrapolating sampling in air, to improve measuring accuracy.
To achieve the goals above, the present invention adopts the following technical scheme that:
A method of based on resistance measurement concentration of hydrogen sulfide, include the following steps:
A carries out sampling and sample treatment to hydrogen sulfide, obtains the solution of Containing Sulfur silver colloid;
The resistance value of solution where b measures vulcanization silver colloid calculates the dense of hydrogen sulfide in sample using the resistance value that measures
Degree.
Preferably, in the step a, sampling and sample treatment are carried out to hydrogen sulfide using standard GB/T Z160.33.
Preferably, in the step b, the resistance value of solution where measuring vulcanization silver colloid using resistance measuring module.
Preferably, in the step b, resistance measuring module uses liquid resistivity measuring instrument.
Preferably, in the step b, the concentration of hydrogen sulfide in sample is calculated using data processing module.
Preferably, in the step b, data processing module uses microcontroller.
Preferably, in the step b, the reckoning step of concentration of hydrogen sulfide is in sample:
Vulcanization silver colloid proportion in the solution is calculated using resistance value, extrapolates the dense of hydrogen sulfide in sample according to this
Degree.
Preferably, further include step after the step b:
C shows resistance value and final concentration of hydrogen sulfide result in measurement process.
Preferably, in the step c, resistance value and concentration of hydrogen sulfide result are shown using display module.
Preferably, in the step c, display module uses LED display.
The invention has the advantages that:
The present invention passes through the resistance of sample solution, concentration of hydrogen sulfide when extrapolating sampling in air, compared to mesh
For colorimetric method, the influence of the factors such as ambient light illumination and the collimation error can be avoided, the configuration of standard curve need not be carried out
With drafting, and by measurement vulcanize silver colloid resistance so that reckoning concentration of hydrogen sulfide method, the accuracy of measurement can be improved.
Description of the drawings
Fig. 1 is a kind of flow diagram of the method based on resistance measurement concentration of hydrogen sulfide in the embodiment of the present invention 1;
Fig. 2 is a kind of flow diagram of the method based on resistance measurement concentration of hydrogen sulfide in the embodiment of the present invention 2.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific implementation mode invention is further described in detail:
Embodiment 1
In conjunction with shown in Fig. 1, a method of based on resistance measurement concentration of hydrogen sulfide, include the following steps:
A carries out sampling and sample treatment to hydrogen sulfide, obtains the solution of Containing Sulfur silver colloid;
The resistance value of solution where b measures vulcanization silver colloid calculates the dense of hydrogen sulfide in sample using the resistance value that measures
Degree.
A and b through the above steps so that the method in the present embodiment 1 has the following advantages that:
One, it is avoided that the interference of environmental factor and the sense of vision factor of people, reduces error;
Two, the configuration and drafting of standard curve need not be carried out;
Three, the method by measuring resistance can improve the accuracy of concentration of hydrogen sulfide measurement.
In step a, sampling and sample treatment are carried out to hydrogen sulfide using standard GB/T Z160.33.
The sampling process of hydrogen sulfide is specific as follows:In sampled point, series connection two is respectively equipped with the porous of 10.0ml absorbing liquids
Plate absorption tube, with 0.5L/min flow collection 15min air samples.
After sampling, close absorption tube into and out of tracheae, be placed in transport in clean container and preserve.
The processing procedure of hydrogen sulfide sample is:With the air inlet inside pipe wall 3 times for the absorbing liquid washing absorption pipe for adopting sample.It is front and back
Pipe respectively takes 5.0ml absorbing liquids in color-comparison tube, shakes up, for measuring.
Wherein, the effect of washing is that a small amount of liquid for allowing air inlet inside pipe wall to attach also is mixed into absorbing liquid, prevents from causing
Loss.
It, can be with being measured after diluted absorption solution if the concentration of determinand is more than measurement range in sample liquid, when calculating, is multiplied by dilute
Release multiple.
In stepb, the resistance value of solution where measuring vulcanization silver colloid using resistance measuring module.
Preferably, above-mentioned resistance measuring module uses liquid resistivity measuring instrument.
In stepb, the concentration of hydrogen sulfide in sample is calculated using data processing module.
Preferably, above-mentioned data processing module uses microcontroller.
In stepb, the reckoning step of concentration of hydrogen sulfide is in sample:
Vulcanization silver colloid proportion in the solution is calculated using resistance value, extrapolates the dense of hydrogen sulfide in sample according to this
Degree.
There are following functional relations with resistance value for concentration of hydrogen sulfide, i.e.,:C(H2S)=F (x);
Wherein, C (H2S) indicate that concentration of hydrogen sulfide, x indicate that resistance value, F () indicate corresponding functional relation.
It was proved that with the increase of vulcanization silver colloid proportion, resistance value increases, and concentration of hydrogen sulfide increases.
The cooperative working process of resistance measuring module and data processing module is:
The resistance value of resistance measuring module sample solution (solution where vulcanizing silver colloid), the resistance value measured are defeated
It send to data processing module, calculates to obtain the concentration of hydrogen sulfide in sample by data processing module.
Embodiment 2
The present embodiment 2 has addressed a kind of method based on resistance measurement concentration of hydrogen sulfide, and this method removes following technical characteristic
Except 1 difference of above-described embodiment, remaining technical characteristic can refer to above-described embodiment 1.
As shown in Fig. 2, further including step after step b:
C shows resistance value and final concentration of hydrogen sulfide result in measurement process.
In step c, resistance value and concentration of hydrogen sulfide result are shown using display module.
Preferably, display module uses LED display.
By above-mentioned display module, the data such as the resistance value in concentration of hydrogen sulfide and measurement process can be inquired in time.
The cooperative working process of resistance measuring module, data processing module and display module is:
The resistance value of resistance measuring module sample solution (solution where vulcanizing silver colloid), the resistance value measured are defeated
It send to data processing module, after data processing, the resistance in concentration of hydrogen sulfide and measurement process is inquired using display module
Value.
Certainly, described above is only that presently preferred embodiments of the present invention is answered the present invention is not limited to enumerate above-described embodiment
When explanation, any technical person familiar with the field is all equivalent substitutes for being made, bright under the introduction of this specification
Aobvious variant, all falls within the essential scope of this specification, ought to be protected by the present invention.