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Pretreatment method for determination of heavy metals in pig manure

A technology for heavy metals and pig manure, which is applied to measurement devices, preparation and sampling of samples for testing, etc., can solve the problems of water environment pollution, only production and use of manure, and destruction of farmland ecological environment. The effect of temperature optimization, reducing inspection cost

Inactive Publication Date: 2018-12-04
江西省兽药饲料监察所 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of awareness of environmental protection by farmers and the inadequate control technology for manure treatment in pig farms, most of the manure in the breeding bases is only produced and not used, which not only destroys the ecological environment of farmland, but also faces great threats to people's living environment
In particular, if the heavy metals produced in pig manure are discharged into the soil, they will seriously harm soil microorganisms, and at the same time poison vegetables through plant roots, indirectly affecting human health; if discharged into water bodies, it will seriously affect the quality of groundwater and affect the water environment. create pollution

Method used

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  • Pretreatment method for determination of heavy metals in pig manure
  • Pretreatment method for determination of heavy metals in pig manure
  • Pretreatment method for determination of heavy metals in pig manure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A pretreatment method for the determination of heavy metals in pig manure, comprising the steps of:

[0017] (1) Take a pig manure sample and place it in an oven to dry at 60°C to constant weight, crush it with a powder sample machine and pass it through an 80-mesh sieve to obtain pig manure powder;

[0018] (2) Take 0.2g of pig manure powder and place it in the digestion tube, then add the digestion liquid into the digestion tube according to the solid-to-liquid ratio of 1:30, shake well, and cover the digestion tube;

[0019] The digestion solution is composed of nitric acid and hydrochloric acid according to a volume ratio of 1:6;

[0020] (3) Put the digestion tube into the graphite furnace, digest for 60 minutes, and set the digestion temperature to 120°C;

[0021] (4) After the digestion is completed, cool down to obtain the sample pretreatment solution, which is subjected to twice constant volume of the sample pretreatment solution, and then detected by ICP-MS; ...

Embodiment 2

[0024] experimental method:

[0025] (1) Take the pig manure sample and place it in an oven for drying at 60°C, crush it with a powder sample machine and pass it through an 80-mesh sieve to obtain pig manure powder;

[0026] (2) Dry the pig manure powder at 60°C to constant weight and weigh 0.2g of the pig manure powder;

[0027] (3) Orthogonal experimental design of digestion test:

[0028] Three factors were selected: solid-liquid ratio, digestion time (min), and volume ratio of digestion solution (nitric acid: hydrochloric acid), each factor was set at three levels (Table 1), and L9 (33) orthogonal design was adopted. According to the orthogonal experimental design, 9 experiments were performed, each experiment was repeated 3 times, and a total of 27 measurements were made. At the same time, three blank control experiments were set up.

[0029] Table 1 3-factor horizontal orthogonal design table

[0030]

[0031] (4) Set the digestion temperature to 120°C. Digest eac...

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Abstract

The invention relates to a pretreatment method for determination of heavy metals in pig manure, belonging to the technical field of environmental monitoring. The pretreatment method comprises the following steps: drying a pig manure sample; then treating the pig manure sample with a digestion solution, a graphite oven and the like successively; and carrying out dilution and volume fixation, and then determining the content of heavy metal elements in the pig manure sample by using ICP-MS. The method can greatly improve sample pretreatment efficiency, enhance the accuracy of detection results and realize the detection of ultra-low-concentration heavy metals, and has the advantages of reduced use amount of reagents, reduced detection cost, etc.

Description

technical field [0001] The invention relates to a pretreatment method for the determination of heavy metals in pig manure, belonging to the technical field of environmental monitoring. Background technique [0002] In recent years, with the rapid development of the agricultural economy, the scale and intensification of pig farms have continued to increase, and the feces produced by pig farms have increased significantly. According to literature surveys, a certain county excretes at least 7.2 tons of arsenic and copper through pig manure every year. 21.0-35.1 tons. Waste excrement from livestock farms is another major source of environmental pollution after the industrial "three wastes", pesticides, fertilizers, traffic exhaust and domestic waste, and large-scale pig farms are the main source of pollution. Due to the lack of awareness of environmental protection by farmers and the inadequate control technology for manure treatment in pig farms, most of the manure produced in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/44G01N27/62
CPCG01N1/286G01N1/44G01N27/62
Inventor 杨琳芬符金华徐国茂李勇夏骏李瑾瑾李俊李旭荣刘景湖胡祥叶春华邓倩陈桂平金海红邓宇霍光华
Owner 江西省兽药饲料监察所
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