Convenient colorimetric technique for detecting subaqueous polymorphic chlorine and its color comparator

A colorimetric, polymorphic technology, applied in the measurement of color/spectral properties, material analysis by observing the effect on chemical indicators, analysis by chemical reaction of materials, etc., can solve the problem of inability to detect chlorite. , can only detect residual chlorine, total chlorine, combined chlorine; or can only detect chlorine dioxide and other problems

Active Publication Date: 2011-06-15
黄晓平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 4. Use imported portable single-item colorimeters and supporting reagents for measurement, but the existing portable single-item colorimeters can only detect residual chlorine, total chlorine, and combined chlorine; or can only detect chlorine dioxide, that is to say, at least It is necessary to purchase 2 different individual colorimeters to detect the 4 items of residual chlorine, total chlorine, combined chlorine and chlorine dioxide respectively, but even if the 2 different individual colorimeters are put into use, they still cannot detect hypochlorite salt

Method used

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  • Convenient colorimetric technique for detecting subaqueous polymorphic chlorine and its color comparator
  • Convenient colorimetric technique for detecting subaqueous polymorphic chlorine and its color comparator
  • Convenient colorimetric technique for detecting subaqueous polymorphic chlorine and its color comparator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] For water samples that have been disinfected only with chlorine gas (or other chlorine-based disinfectants, such as sodium hypochlorite, bleaching powder, bleaching powder, etc.)—select the factory water of XX water plant in a certain city:

[0062] Use the sample cup 50 to take 25ml of the factory water from the water plant, add the No. ② reagent pack, mix well (about 25 seconds), put it into the instrument cup holder 13, and press the reading key to measure in the residual chlorine mode, and the measured result is E=0.49 mg / L is the free chlorine content (calculated as chlorine).

[0063] Use the sample cup 50 to take 25ml of the factory water from the water plant, add the No. ③ reagent pack, mix well (about 25 seconds), put it into the instrument cup holder 13, and measure according to the reading key in the residual chlorine mode, and the measured result is F=0.95 mg / L is the total chlorine content (calculated as chlorine).

[0064] Combined chlorine: use F-E=0.95-...

Embodiment 2

[0066] For water samples disinfected with chlorine and chlorine dioxide composite disinfectant—select the factory water of YY water plant in a certain city:

[0067] Use the sample cup 50 to take 25ml of factory water from the water plant, add reagent pack No. ②, mix well (about 25 seconds), put it into the instrument cup holder 13, press the reading key to measure in the residual chlorine mode, and the measured result is E=0.27 mg / L; then use the sample cup 50 to take another 25ml of factory water from YY water factory, then add reagent No. In the residual chlorine mode, press the reading key to measure, and the measured result is A=0.16mg / L, then E-A=0.11mg / L is the free chlorine content (calculated as chlorine).

[0068] Use the sample cup 50YY water factory factory water 25ml, add the ③ reagent pack, mix well (about 25 seconds), put it into the instrument cup holder 13, press the reading key to measure in the residual chlorine mode, the measured result is F=0.52mg / L; use...

Embodiment 3

[0071] Still aiming at the water samples sterilized by chlorine gas and chlorine dioxide composite disinfectant—still select the water samples of the above-mentioned Example 2 shipped from a YY water plant in a certain city:

[0072] Switch the instrument to chlorine dioxide mode. Use the sample cup 50 to take 25ml of factory water from the YY water factory, add reagent pack No. The amount of color development is equivalent to ClO 2 The concentration of 1 / 5 available chlorine is i, and the instrument automatically calculates 5i / 2.63=1.9i to show that ClO 2 The total effective concentration is 0.15 (mg / L), and the result is the chlorine dioxide content (calculated as chlorine dioxide).

[0073] Then use the sample cup 50 to take another 25ml of YY water factory factory water, add the No. ③ reagent pack, mix well (about 25 seconds), put it into the instrument cup holder 13, press the reading key for the second time, and the instrument will display an intermediate value j=0.53...

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Abstract

The present invention relates to a portable colorimetry for examining multiple-form chlorine in water and photoelectric color comparator thereof. The colorimetery employs the color reaction of DPD and sterilization chlorine agent in water to determining multiple-form chlorine content derived from sterilization chlorine agent, which includes employing glycine masking free chlorine, employing potassium iodide catalyzing and chemical combining chlorine to participate in color and employing phosphate buffer solution. The weight matched granule DPD, potassium iodide, EDTA and phosphate are packed into two reagent bags respectively, DPD and phosphate granules are packed in the reagent bag 2, DPD, potassium iodide, EDTA and phosphate granules are packed in the reagent bag 3; the free chlorine inwater is determined by reagent in reagent bag 2, the total chlorine in water is determined by reagent in reagent bag 3, and then the chemical combination chlorine content is calculated. The colorimetry and photoelectric color comparator of the present invention can determine the surplus chlorine, total chlorine, combination chlorine, chlorine dioxide and chlorite salt in water immediately, rapidly and flexibly after sampling in site.

Description

technical field [0001] The invention relates to a chemical analysis method and equipment, more specifically, the invention relates to a chemical analysis method and equipment for detecting water quality disinfection. Background technique [0002] At present, in the fields of drinking water, mineral water, pure water, direct drinking water disinfection, and wastewater treatment, traditional chlorine gas disinfectants and emerging chlorine dioxide disinfectants are widely used as disinfectants or water treatment agents. Correspondingly, In the monitoring and control of water quality indicators, residual chlorine, total chlorine, combined chlorine-chlorine dioxide and chlorite are the most important and most widely tested items. [0003] Usually, for water samples containing only chlorine or chlorine-type disinfectants such as sodium hypochlorite, bleaching powder, bleaching powder, etc., because the content of chlorine dioxide and chlorite is zero, it is only necessary to meas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/25
Inventor 黄晓平
Owner 黄晓平
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