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Test method for evaluating reaction proportion of nascent state oxygen during determination of ozone in water with iodometric method

A new ecological oxygen and iodometric method, applied in the field of analytical chemistry, to achieve accurate measurement data and perfect iodometric method

Active Publication Date: 2017-04-26
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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AI Technical Summary

Benefits of technology

This patented technology allows for precise determination of dissolved organic compounds (DOMs) concentrations by measuring their absorption spectra from light at different wavelength ranges. By comparing this spectral measurements against previously determined values or reference standards, it can help identify specific substances within aqueous samples accurately.

Problems solved by technology

This patented technical problem addressed in this patents relates to accurately measuring the amount of hydrogen peroxy radical (OH), an important chemical called dioxane, produced during manufacture processes for food products like fish paste production. Current analytical techniques involve complicated procedures involving multiple steps and require expensive reagents. There have been attempts at developing simpler ways to detect these compounds without requiring complex instrumentations.

Method used

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  • Test method for evaluating reaction proportion of nascent state oxygen during determination of ozone in water with iodometric method
  • Test method for evaluating reaction proportion of nascent state oxygen during determination of ozone in water with iodometric method

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preparation example Construction

[0032] 1) Preparation of ozone water: prepare reverse osmosis product water (conductivity 1.8us / cm) from tap water, then add 98% concentrated sulfuric acid dropwise to reverse osmosis product water and stir until the pH of test water is 2.33; Add 1.6L of test water at one time, turn on the constant temperature water bath, and the constant temperature water flows through the jacket of the bubbling column to keep the test water in the bubbling column at 23°C; Disperse into the test water to obtain ozone water, and record the readings of ozonated air flow, temperature, gauge pressure, aeration time and gas phase ozone concentration detector (5L / min, 23°C, 0.005MPa, 20min and 6.8mg / LO 3 . It is calculated that the gas phase ozone concentration under the test conditions is 7.14mg / L, and the mass ratio of oxygen, nitrogen and ozone is 20.4268%:79.0000%:0.5732%. ); the exhaust gas is removed from the ozone with an absorption bottle, and then emptied.

[0033] 2) Sampling of ozone...

Embodiment 1

[0052] According to the above steps 1)-6), carry out the test, the test results are as follows.

[0053] (a) The concentration of ozone in water is measured by the indigo field measurement method, and the value is 1.45mg / L. 3 . Thus, get X=1.45×10 -4 (g)

[0054] (b) Ozone concentration in water is measured by iodometric method and in conjunction with X, calculation formula (6) obtains P

[0055] V 1

Embodiment 2

[0057] According to the above steps 1)-6), carry out the test, the test results are as follows.

[0058] (a) The concentration of ozone in water is measured by the indigo field measurement method, and the value is 1.45mg / L. 3 . Thus, get X=1.45×10 -4 (g)

[0059] (b) Ozone concentration in water is measured by iodometric method and in conjunction with X, calculation formula (6) obtains P

[0060] V 1

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Abstract

The present invention relates to a test method for evaluating the reaction proportion of nascent state oxygen during determination of ozone in water with an iodometric method. According to the present invention, a test method is developed, and is used for solve the problems of the reaction between the nascent state oxygen and the iodide ions and the proportion of the nascent state oxygen occurring the reaction during the determination of ozone in water with the iodometric method; the method is characterized in that the whole set of the test method is designed, a test condition is selected, and the presence of the oxygen occurring the reaction in the nascent state oxygen is determined by calculating the test data, wherein the chemical equation O2+4I+4H<+>=2I2+2H2O exists in the iodometric method; and with the method, when the iodometric method is used to determine the ozone concentration in the water, the determined data is accurate, and the iodometric method is perfect.

Description

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Claims

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Application Information

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Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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