Method for measuring concentration of NaSCN solution through conductivity

A solution concentration and conductivity measurement technology, applied in the field of analysis and testing, can solve the problems of increased sample cost, time-consuming, uneconomical, etc., and achieve the effect of reliable data, small process error and low cost

CN107402239AInactive Publication Date: 2017-11-28兰州蓝星纤维有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-11-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for measuring concentration of a NaSCN solution through conductivity. The method comprises steps as follows: the concentration of the NaSCN solution is calculated by measuring the conductivity of the NaSCN solution; when the concentration of NaSCN is 0.5%-5%, the conductivity of the NaSCN solution is measured, and the concentration of the NaSCN solution is calculated according to the formula Y=0.1057X-0.1515; when the content of NaSCN is 30 ppm-5,000 ppm, the conductivity value of the NaSCN solution is measured, and the concentration of the NaSCN solution is calculated according to the formula Y=0.7831X-4.1847. The method is high in speed, convenient to use and low in cost, small errors are caused in the process, a result can serve as a basis for judgment of a production operation condition and technology adjustment, and the method can be widely used in industrial continuous production devices.
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Description

technical field

[0001] The invention relates to the field of analysis and testing, and furthermore, relates to a method for measuring the concentration of NaSCN solution through conductance. Background technique

[0002] At present, methods such as potentiometric titration, ion chromatography and spectrophotometer are mostly used in the quantitative detection of NaSCN solution. The above detection methods can accurately detect unknown solutions of different concentrations, and are suitable for large-scale routine analysis.

[0003] The above method generally takes a long time. For example, potentiometric titration needs to go through a series of processes such as instrument preheating, accurate sample weighing, sample dilution, automatic titration and data processing (it takes about 50 minutes from sampling to obtaining results); at the same time, the chemical reagent AgNO 3 solution, which not only increases the cost of sample testing, but also requires collection and trea...

Examples

Embodiment 1～6

[0063] Embodiment 1~6 (low concentration NaSCN solution)

[0064] Six NaSCN solution samples with different concentrations were randomly taken, and the corresponding concentrations were calculated after measuring the conductance with a conductivity meter.

[0065] Steps include:

[0066] 1) measure the specific gravity of NaSCN solution;

[0067] 2) Calculate the concentration of NaSCN solution by formula Y=0.1057X-0.1515;

[0068] Wherein, X represents the proportion of NaSCN solution, and Y represents the concentration of NaSCN solution;

[0069] 3) according to the concentration of the NaSCN that step 2) obtains;

[0070] 4) Perform potentiometric titration on the same sample to obtain an accurate concentration, compare the measured concentration with the calculated concentration and calculate the error. See Table 1 for process data.

[0071] Table 1

[0072]

[0073] Practice has proved that the concentration value of NaSCN solution in a specific condition range can...

Embodiment 4～6

[0074] Embodiment 4~6 (concentration of Ppm level NaSCN solution)

[0075] Six NaSCN solution samples with different concentrations were randomly taken at the on-line conductivity meter at the production site, and the corresponding concentrations were calculated after recording the on-line conductivity value at the same time.

[0076] Steps include:

[0077] 1) measure the specific gravity of NaSCN solution;

[0078] 2) Calculate the concentration of NaSCN solution by formula Y=0.7831X-4.1847;

[0079] Wherein, X represents the proportion of NaSCN solution, and Y represents the concentration of NaSCN solution;

[0080] 3) according to the concentration of the NaSCN that step 2) obtains;

[0081] 4) Perform potentiometric titration on the same sample to obtain an accurate concentration, compare the measured concentration with the calculated concentration and calculate the error. See Table 2 for process data.

[0082] Table 2

[0083]

[0084] Practice has proved that t...