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Method for detecting chlorine ion content of sea sand

A kind of technology of chloride ion content and detection method, applied in the field of chloride ion content detection

Pending Publication Date: 2021-04-30
山西省交通建设工程质量检测中心(有限公司)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to overcome the defect of the existing chloride ion content detection method, and provide a new detection method of chloride ion content in sea sand

Method used

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  • Method for detecting chlorine ion content of sea sand
  • Method for detecting chlorine ion content of sea sand

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dry the sea sand in Zhuhai, Guangdong in a naturally humid state in a drying oven at 100°C to constant weight, cool to room temperature and sieve; weigh 500g of the treated sea sand sample to be tested and pour it into 600ml of deionized water. Put it into a constant temperature water bath box with a temperature of 80 °C and keep heating for 1 hour. During the heating process, stir once every 10 minutes. Pour the solution into the Erlenmeyer flask, drop the phenolphthalein reagent into the Erlenmeyer flask, the eluate turns red, add 0.1mol / LHNO 3 solution, shake the Erlenmeyer flask while adding, until the eluate becomes colorless; add 3ml of 30wt% concentration of H 2 o 2 solution, then add 1mL of 5wt% potassium chromate indicator, and then use 0.01mol / L AgNO 3 Titrate the standard solution, shake the Erlenmeyer flask continuously during the titration process until the end point is brick red, and record the consumed AgNO 3 The amount of standard solution, the first ...

example 1

[0034] Calculate the chloride ion content in sea sand using the test method in GB / T 14684-2011 "Sand for Construction". According to the quartering method, take 1100g of sea sand samples from the same source as in the above example 1, place them in a drying oven and dry them to constant weight, and then cool them for later use; weigh 500g of dry sand and pour them into a grinding bottle, and inject 500mL into the grinding bottle distilled water, cover the stopper, shake it once and let it stand for 2 hours, then shake it once every 5 minutes, and shake it 3 times in total to dissolve the chloride salt; filter the clarified solution on the upper part of the grinding bottle and pour 50ml of the eluate into the Erlenmeyer flask , adding 1ml concentration of 5%wt potassium chromate indicator, with 0.01mol / L AgNO 3 Standard solution was used for titration. During the titration process, the Erlenmeyer flask was shaken continuously until the end point was brick red, and the AgNO 3 T...

example 2

[0036]Dry the sea sand in Zhuhai, Guangdong in a naturally humid state in a drying oven at 100°C to constant weight, cool to room temperature and sieve; weigh 500g of the treated sea sand sample to be tested and pour it into 600ml of deionized water. Put it into a constant temperature water bath with a temperature of 100°C and keep heating for 1 hour. During the heating process, stir once every 10 minutes. After the stirring is completed, let it stand for 10 hours and then cool to room temperature. Filter to obtain the chloride ion eluate of sea sand, and use a pipette to extract 50ml of the eluate. Pour the solution into the Erlenmeyer flask, drop the phenolphthalein reagent into the Erlenmeyer flask, the eluate turns red, add 0.1mol / LHNO 3 solution, shake the Erlenmeyer flask while adding, until the eluate becomes colorless; add 3ml of 30wt% concentration of H 2 o 2 solution, then add 1mL of 5wt% potassium chromate indicator, and then use 0.01mol / L AgNO 3 Titrate the stand...

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Abstract

The invention discloses a method for detecting the chlorine ion content of sea sand. The detection method comprises the following steps: drying naturally humid sea sand to constant weight, performing sieving, adding deionized water, performing stirring, performing heating, performing standing, and performing filtering to obtain a chloride ion dissolution solution of the sea sand; adding a phenolphthalein reagent into chloride ion dissolution liquid of sea sand, and adjusting the dissolution liquid to be neutral by using an HNO3 solution or a NaOH solution; then adding an H2O2 solution into the dissolved-out liquid to remove the influence of sulfur ions; continuously adding a potassium chromate solution as an indicator, and determining the content of chloride ions in the dissolution solution by adopting a silver nitrate titration method. According to the detection method, chloride ions in the sea sand can be fully released, the influence of factors such as pH values and sulfur ions in the sea sand on the detection result is eliminated, the detection precision is improved, the detection result is more accurate and reliable, and a reliable basis is provided for the use of the sea sand in the engineering field.

Description

technical field [0001] The invention belongs to the technical field of chlorine ion content detection, and in particular relates to a detection method for the chloride ion content of sea sand. Background technique [0002] At present, with the acceleration of urbanization in my country, the amount of river sand has increased sharply, and the storage of river sand has gradually decreased or even dried up. Sea sand is an ideal supplementary resource for river sand. Compared with river sand, sea sand has a better particle size. , low sediment content, low price and other characteristics, and my country's coastal areas are rich in sea sand resources. Sea sand is a good substitute for river sand, with good grain shape, low cost, low mud content and abundant reserves. The full use of sea sand can effectively alleviate the tension of construction sand in my country, which is of great significance to the development of the construction industry. The "Sand for Construction" specific...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/78
CPCG01N31/16G01N21/78
Inventor 刘俊瑞林超朱金鹏李洁王慧鑫朱洪泉高秀鑫张宏宇毛成琦陈明星杨尉明李明博王敏
Owner 山西省交通建设工程质量检测中心(有限公司)
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