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Method for measuring content of plumbum element in soil with ICP method

A soil and metal element technology, applied in the field of measuring lead in soil by ion atomic emission spectrometry, can solve the problems of large measurement error and insufficient solution digestion.

Active Publication Date: 2013-07-03
HANGZHOU PROCESS DETECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also the use of ICP method to measure lead metal elements, but the preparation of the solution before the measurement has problems of insufficient digestion and large measurement errors

Method used

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  • Method for measuring content of plumbum element in soil with ICP method
  • Method for measuring content of plumbum element in soil with ICP method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step 1: Weigh 5.0g of an appropriate amount of sample in the soil and add an appropriate amount of hydrofluoric acid 100mL to fully dissolve it, use a pipette to accurately absorb 5mL of the supernatant and put it into a Teflon digestion tank, add 1mL of high-concentration nitric acid and 1mL High-concentration sulfuric acid is then subjected to microwave digestion, which is completely digested in a polytetrafluoroethylene high-temperature and high-pressure digestion tank; the specific microwave digestion process is as follows:

[0016] steps

Power (W)

Heating time (s)

Temperature (Celsius)

Hold time (min)

1

300

480

150

5

2

500

330

200

3

3

700

330

240

3

[0017] After the above-mentioned treated solution is cooled to room temperature, add 1mL of 15% potassium permanganate solution and a small amount of water; put it on the electric heating plate again and heat it for dige...

Embodiment 2

[0022] Step 1: Weigh 8.0g of an appropriate amount of sample in the soil and add an appropriate amount of hydrofluoric acid 100mL to fully dissolve, use a pipette to accurately absorb 5mL of the supernatant into a Teflon digestion tank, add 1mL of high-concentration nitric acid and 1mL High-concentration sulfuric acid is then subjected to microwave digestion, which is completely digested in a polytetrafluoroethylene high-temperature and high-pressure digestion tank; the specific microwave digestion process is as follows:

[0023] steps

Power (W)

Heating time (s)

Temperature (Celsius)

Hold time (min)

1

300

540

160

5

2

500

360

205

3

3

700

360

245

3

[0024] After the above-mentioned treated solution is cooled to room temperature, add 1mL of 15% potassium permanganate solution and a small amount of water; put it on the electric heating plate again and heat it for digestion until th...

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Abstract

The invention discloses a method for measuring the content of a plumbum element in soil with an ICP (inductively coupled plasma) method. An ICP-AES (atomic emission spectrometry) method is used for measuring the content of plumbum in a soil sample. The method comprises the steps as follows: a certain amount of a hydrofluoric acid solution is added to a lead-bearing sample in the soil, then high-concentration nitric acid and high-concentration sulfuric acid are added, and then microwave digestion is performed; and high-temperature digestion is performed in a focus digestion tank, then an ICP-AES spectrograph is used for measuring the content of plumbum, and during measurement, experiment parameters are chosen reasonably according to requirements of an experiment, so that the content of plumbum in the soil sample can be measured more conveniently, rapidly and accurately. The detection limit of the method is 0.15 mu g / mL, and requirements of production and living can be met.

Description

technical field [0001] The invention relates to the field of environmental element measurement, in particular to the measurement of lead element in soil by ICP plasma atomic emission spectrometry. Background technique [0002] Lead in soil is mainly Pb(OH) 2 , PbCO 3 , PbSO 4 Existing in solid form, lead is a poisonous blue-gray metal. It often enters the human body through contaminated food and respiratory tracts in the form of vapors, dust and compounds. Plants absorb soluble lead in the soil through the root system, especially tomato, potato, radish, barley, corn, tobacco, etc., which are susceptible to negative pollution, and accumulate in the root. Fish, clams, and clams can accumulate lead from sludge, and the lead concentration in their bodies can be 1,000 times higher than that in water bodies. Containers used in processing, storage, and transportation are in direct contact with food, and lead-containing lead arsenate is used in pesticides, which can cause lead ...

Claims

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Application Information

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IPC IPC(8): G01N1/44
Inventor 傅酉付玉生
Owner HANGZHOU PROCESS DETECTION TECH CO LTD
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