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A method for determining volatile phenols and cyanides in water quality, soil or municipal sludge

A technology for volatile phenols and cyanides, applied in the field of determination of volatile phenols and cyanides in water quality, soil and urban sludge, can solve the problems of no cyanides and volatile phenols, etc., achieve simple detection scheme, wide application prospect, The effect of avoiding harm

Active Publication Date: 2019-07-12
HENAN GUANGDIAN METROLOGY & TESTING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no application of the above-mentioned device in the detection of cyanide and volatile phenol

Method used

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  • A method for determining volatile phenols and cyanides in water quality, soil or municipal sludge
  • A method for determining volatile phenols and cyanides in water quality, soil or municipal sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Cyanide detection:

[0050] 1. Carry out empty tube distillation first, and clean the instrument pipeline twice;

[0051] 2. Use a pipette to accurately pipette an accurate volume of the measurement sample, and add several glass beads to the digestion tube;

[0052] 3. Add an appropriate amount of zinc nitrate solution into the distillation bottle, add a few drops of methyl orange indicator, then quickly add 5ml of tartaric acid solution, adjust the pH of the solution to 4 through the acid liquid port, lye liquid port and water liquid port or add disodium EDTA Solution and phosphoric acid, make the solution pH<2, start distillation;

[0053] 4. Pipette 10ml of sodium hydroxide into the absorption bottle, and carry out the absorption of distilled easily released cyanide and total cyanide respectively;

[0054] 5. After the distillation is completed, stop the distillation and perform sample determination;

Embodiment 2

[0056] Detection of volatile phenols:

[0057] 1. Carry out empty tube distillation first, and clean the instrument pipeline twice;

[0058] 2. Accurately absorb the measurement sample with a pipette, add a few glass beads to the digestive tube to prevent bumping, add methyl orange indicator solution, and add phosphoric acid to adjust the pH of the solution to 4;

[0059] 3. Set the distillation time, and place a conical flask at the distillate to receive the distillate;

[0060] 4. After the distillation is completed, transfer the distillate into a separatory funnel or a colorimetric tube for extraction or direct colorimetry;

[0061] The detection results of volatile phenols are shown in Table 1~3:

[0062] Table 1 Determination results of volatile phenol standard samples

[0063] Numbering Standard sample concentration (ug / mL) Sampling volume (ml) Distillation time (min) Determination of content (ug) Recovery rate% 1 0.016 50 3.0 0.0128 80 ...

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Abstract

The invention belongs to the technical field of the environment detection, and particularly discloses an application of a kjeldahl apparatus for measuring micromolecular harmful substance. The micromolecular harmful substance comprises volatile phenol and cyanide. The kjeldahl apparatus is provided with an alkali liquor opening, an acid liquor opening, a steam pipe and a water opening. The steam pipe is connected with the water opening. The steam pipe is internally provided with a pH sensing electrode. The application comprises the following steps: washing the pipeline of the kjeldahl apparatus, and adding a sample to be measured to the kjeldahl apparatus pipe, adding a indicator, adjusting the pH value, distilling, and collecting distillate for measuring. The distilling pretreatment process of the volatile phenol and cyanide in the water, soil and municipal sludge can be solved by the distilling device of the kjeldahl apparatus. The environmental and safe distilling method for measuring the cyanide in the water, soil and municipal sludge is established, and an experimenter is avoided to be hurt by the poisonous gas. The detection solution is simple and easily operated. The accuracy of the method is high, and the application prospect is extensive.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, and more specifically relates to a method for measuring volatile phenols and cyanides in water quality, soil and urban sludge. Background technique [0002] The determination of volatile phenol and cyanide is the basic item of the surface water environmental quality standard in the field of national environmental monitoring, the comprehensive discharge standard of domestic sewage and industrial wastewater. Volatile phenol and cyanide are also the basic items of soil and urban sludge pollutant detection. These detection items are in The daily monitoring work in the field of environmental protection has a large amount of samples and high work intensity. At the same time, the determination of these factors requires the construction of a distillation device for sample pretreatment. During the preparation of the distillation sample, the distillation or absorption device is prone to air ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 花建丽黄飞高帅鹏邓要强孙攀栋
Owner HENAN GUANGDIAN METROLOGY & TESTING CO LTD
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