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Trace quantity sodium ion automatic rapid determination method and apparatus

A rapid determination and sodium ion technology, applied in the field of chemical analysis and quantification, can solve the problems of slow analysis speed, large sample consumption, poor analysis result precision, reproducibility and accuracy, etc., to eliminate the influence of electrode active surface , prolong the service life, the effect of fast measurement speed

Inactive Publication Date: 2004-08-25
李永生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method takes about 10 minutes to measure each sample, and the consumption of each sample is about 500ml
[0005] The main problem that prior art exists is that preparation work is troublesome, and operation is complicated, and general staff is difficult to grasp, and analysis speed is slow, and sample, I grade reagent water (PW) and alkalizing agent (AR) consumption are big, and from pressure-stabilizing container ( It is time-consuming and difficult to clean the analysis flow path from SP) to the waste outlet (W). When samples with high sodium concentration are converted into samples with low sodium concentration, cross-contamination often occurs, and the precision, reproducibility and accuracy of the analysis results are poor. Poor, no automatic quick analysis

Method used

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  • Trace quantity sodium ion automatic rapid determination method and apparatus
  • Trace quantity sodium ion automatic rapid determination method and apparatus
  • Trace quantity sodium ion automatic rapid determination method and apparatus

Examples

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Embodiment 1

[0050] Utilize method and device of the present invention (see figure 2) Determination of trace sodium ions in boiler water and steam of a power plant. Experimental conditions: the alkalizing agent (12) is 60% diisopropylamine; the semipermeable membrane alkalization tube (11) has used a long 65cm, 0.6mm inner diameter silicone rubber tube with a semipermeable membrane function; Conductivity is the ultrapure water below 0.06 μ S / cm; Reaction coil pipe (16) has used the long 200cm, the polyethylene pipe of inner diameter 0.5mm; Function combination block (14) and flow type electrochemical detector (18) (see image 3 ) has used organic glass material to make; Sodium selective electrode (19) has used 23-8S type glass sodium electrode; Reference electrode (21) has used 001S type calomel electrode; Temperature sensor (20) is TDS-110 type temperature Sensor; Sodium ion processor (22) is DWG-9323A type ion meter; Recorder (23) is XWT-100 desktop automatic balance recorder.

[0051...

Embodiment 2

[0055] In this embodiment, different concentrations of sodium ion standard solutions are used to determine the influence of the injection volume on the sensitivity at room temperature. from Figure 8 It can be seen that with the increase of the injection volume, the sensitivity gradually increases; when the injection volume reaches above 0.80ml, the increase of the peak height tends to be gentle.

Embodiment 3

[0057] This embodiment is to measure the influence of current carrying capacity on sensitivity. When using a single-line analysis device ( Figure 4) , the effect of current carrying capacity on the response peak height is as follows Figure 9 shown. The three curves in the figure are the peak heights measured with sodium standard samples of different concentrations respectively. With the increase of the carrying flow, the peak height increases, but when the carrying flow reaches 3.0ml / min, the peak height increases slowly.

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Abstract

The invention discloses a trace Na ion quickly determining method, applied to water quality analysis and monitoring. Under the action of peristaltic pump, one path of ultrapure water enters pipeline meeting through carrying liquor pump line, flow path and bypass pipeline, the other path fully alkalizes through the alkali liquor flow path to enter the pipeline meeting, the ultrapure water joins the alkali liquor to fully alkalize in the reacting coiled pipe and then enters current electrochemical detector, the blank signal value of the electrode potential signal produced between Na selective electrode and reference electrode is displayed by the Na ion processor and the recorder records the base line of the blank value; a water sample to be measured enters quantitative sampling ring through the lead-in pipe in the sampling position of the filling valve, when the filling valve switches filling position, the filled water sample stuff is uniformly alkalized to enter the current electrochemical detector, the electrode potential signal produced between the Na selective electrode and reference electrode is displayed by the Na ion processor and output to the recorder, which records the real testing curve.

Description

technical field [0001] The invention relates to an automatic and rapid determination method for trace sodium ions and a determination device for realizing the method. It belongs to the technical field of chemical analysis and quantification. The present invention is suitable for rapid determination of trace sodium ions in boiler feed water, steam, condensate water, generator cooling water, anode bed outlet water, nuclear power plant secondary cooling water, semiconductor industry and other water quality management in thermal power plants. Background technique [0002] The content of sodium ions is an important management indicator for PWR nuclear power plants to prevent metal alkali embrittlement, and it is also an important indicator for steam quality in thermal power plants. If the steam carries some sodium-containing impurities, such as sodium hydroxide, sodium chloride, sodium sulfate, etc., it will cause uniform corrosion, pitting corrosion, s...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/333
Inventor 李永生
Owner 李永生
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