Online detecting method of content of heavy metal in water

A detection method and heavy metal technology, applied in the preparation of test samples, measurement of color/spectral characteristics, material analysis through observation of the influence of chemical indicators, etc., can solve the problems of reducing detection efficiency and achieve improved detection efficiency, Real-time online detection and the effect of reducing work intensity

Inactive Publication Date: 2018-03-06
苏州泰坤检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This requires us to detect heavy metals in water, especially manganese, copper and iron, and the existing water sample detection devices, when detecting manganese, copper and iron, respectively react under the corresponding reagent condi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1: The heavy metal is copper. In the S2, the reagent added to the original water sample of the digestion device is a mixture of sulfuric acid and nitric acid; heated together until the temperature reaches 120°C, and digested in an acidic environment for 1-10 minutes, Obtain a completely dissolved dosing water sample, adjust the pH to neutral after cooling, add citrate as a masking agent to eliminate interference, add a buffer solution to alkaline, and then add a color developer.

Example Embodiment

[0039] Example 2: The structure is similar to Example 1, except that the heavy metal is iron, and in the S2, the reagent added to the original water sample of the digestion device is hydroxylamine hydrochloride. After the reaction is complete, adjust the pH to 5. Add color developing agent.

Example Embodiment

[0040] Example 3: The structure is similar to Example 1, except that the heavy metal is manganese, and in the S2, the reagent added to the original water sample of the digestion device is a mixture of mercury sulfate and phosphoric acid, and they are shared Heat until the temperature reaches 60°C-70°C, dissolve in an acidic environment for 1 min, and after cooling, obtain a completely dissolved water sample for dosing.

[0041] Compared with the prior art, the beneficial effects of the online detection method of the present invention are mainly embodied in: realizing automatic control operation of heavy metal content detection, facilitating rapid sampling detection; and real-time online detection, realizing wireless transmission and manipulation of detection data, Improve work efficiency and reduce work intensity.

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Abstract

The invention discloses an online detecting method of the content of heavy metal in water. The online detecting method comprises the following steps: sucking an original water sample of a river channel into a storage cabin by a sampling device, and switching off a water inlet valve and switching on a water outlet valve when a liquid level sensor in the storage cabin induces that the water sample reaches a set amount; outputting the original water sample from the storage cabin, forming a dosing water sample after mixing the original water with a reagent, feeding the dosing water sample into a digestion device, digesting in the digestion device, and cooling; opening a detection light source of a detector, irradiating the dosing water sample by the detection light source through the digestiondevice, reading an optical signal from the detector, and computing the content of the heavy metal; sending data to a computer side by the detector through a wireless signal, and saving the data, thusrealizing real-time online monitoring on the content of the heavy metal in the water. According to the online detecting method disclosed by the invention, 24-hour real-time automatic online detectionon the heavy metal in the water can be realized, and the detection accuracy is high; a detection process is simple and easy to realize, an operator is not required to be on the scene all the time, and labor strength is reduced.

Description

technical field [0001] The invention relates to the technical field of water quality detection methods, in particular to an online detection method for heavy metal content in water quality. Background technique [0002] While the society is developing, it also brings pollution, especially water pollution that seriously affects people's lives. Among them, heavy metals are an important type of pollutant in water. If the content of heavy metals in drinking water exceeds the standard, it will seriously affect people's health. Heavy metals are more common and the content The three most likely to exceed the standard are manganese, copper and iron. in: [0003] 1. Manganese exists in two forms: dissolved and suspended in water. The main sources are domestic sewage and industrial wastewater. Manganese is a trace element needed by life activities, but excessive heavy metal manganese cannot be biodegraded, on the contrary, it can be enriched by hundreds of times under the biomagnif...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/31G01N1/44G01N1/38
Inventor 宋健仇建军田芳张晶刘苇陈晓军
Owner 苏州泰坤检测技术有限公司
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