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Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method

A standard material and measuring instrument technology, which is applied in the measurement of color/spectral properties, electrochemical variables of materials, etc., and can solve the problems of lack of free residual chlorine standard material and total residual chlorine standard material.

Inactive Publication Date: 2013-09-11
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, this area lacks a reliable and stable free residual chlorine standard substance and total residual chlorine standard substance

Method used

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  • Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method
  • Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method
  • Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method

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Experimental program
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Effect test

Embodiment approach

[0062] The "residual chlorine standard substance" of the present invention is two standard solution series of free residual chlorine standard substance and total residual chlorine standard substance, and is mainly used for the evaluation of various indicators of the instrument during the calibration / verification of the portable residual chlorine measuring instrument. The series of solutions are divided into 4 groups, among which free residual chlorine standard substance (low value): 10mg / L; free residual chlorine standard substance (high value): 50mg / L; total residual chlorine standard substance (low value): 50mg / L; Total residual chlorine standard substance (high value): 500mg / L.

[0063] The preparation method of the present invention is as follows:

[0064] 3. Standard substance of free residual chlorine: Use a grade A pipette and pipette gun to measure a certain volume of iodine titration standard substance into a 1L volumetric flask, and dilute to 1L with ultrapure water....

Embodiment

[0075] 1) Free residual chlorine standard substance (low value) Pipette 2.3ml of 0.1mol / L iodine titration standard substance into a volumetric flask with a grade A pipette and pipette gun, and dilute to 1L with ultrapure water.

[0076] 2) Free residual chlorine standard substance (high value) Pipette 23ml of 0.1mol / L iodine titration standard substance into a volumetric flask with a grade A pipette and pipette gun, and dilute to 1L with ultrapure water.

[0077] 3) The total residual chlorine standard substance (low value) is weighed with an electronic balance of 1 / 100,000 chloramine T reagent 0.406g and placed in a beaker, fully dissolved with ultrapure water, transferred to a 1L volumetric flask, and ultrapure Blend with water to prepare evenly and dilute to 1L.

[0078] 4) The total residual chlorine standard substance (high value) is weighed with an electronic balance of 1 / 100,000 and 4.06 g of chloramine T reagent is placed in a beaker, fully dissolved with ultrapure wa...

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Abstract

The invention provides a residual chlorine standard substance. The residual chlorine standard substance comprises the following two series: a free residual chlorine standard substance and a total residual chlorine standard substance, wherein the free residual chlorine standard substance comprises a low-value free residual chlorine standard substance and a high-value free residual chlorine standard substance; the concentration of the low-value free residual chlorine standard substance is 10+ / -1.0mg / L; the concentration of the high-value free residual chlorine standard substance is 50+ / -5.0mg / L; the total residual chlorine standard substance comprises a low-value total residual chlorine standard substance and a high-value total residual chlorine standard substance; the concentration of the low-value total residual chlorine standard substance is 50+ / -1.0mg / L; the concentration of the high-value total residual chlorine standard substance is 500+ / -10.0mg / L; a residual chlorine standard solution is prepared by taking an iodine standard solution and chloramine T as a reagent main body according to the required concentration. The invention also provides a residual chlorine standard substance testing method.

Description

technical field [0001] The invention relates to the field of verification of residual chlorine measuring instruments, and simultaneously covers the field of value transmission of metering tests, in particular to a standard solution for the verification of residual chlorine measuring instruments with wide applicability. Background technique [0002] The residual chlorine detector is mainly used in the analysis of residual chlorine components in various water bodies. Residual chlorine refers to the chlorine remaining in the water after the water has been chlorinated and disinfected for a certain period of time. There are three forms of residual chlorine: free residual chlorine, combined residual chlorine and total residual chlorine. Free residual chlorine includes elemental chlorine, hypochlorous acid and hypochlorite, and combined residual chlorine includes monochloramine, dichloramine and other chloramines. The total residual chlorine includes free residual chlorine and comb...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N27/44
Inventor 陈静文丁敏
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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