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Soil impurity removal method for strontium isotope detection

An impurity removal and isotope technology, applied in the field of cultural relic detection, can solve the problems of unconvincing myths and legends about the origin and spread of silk, and achieve the effects of effective removal of impurities, convenient operation and short digestion time.

Inactive Publication Date: 2019-12-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is the first country in the world to plant mulberry, raise silkworms, reel silk, and weave silk. However, the vast literature can only testify that the production and dissemination of silk dominated the ancient manufacturing industry and luxury goods trade; and the origin of silk And the myths and legends spread are not convincing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Grind the soil sample into powder with a ball mill, pass through a 0.05mm sieve, weigh 0.1g of the powder sample, add 0.05g 84 Sr, placed in a low pressure sealed Teflon tank;

[0020] 2) Add 2ml of 25% concentrated hydrofluoric acid solution HF(aq) and 1ml of 3mol / L concentrated nitric acid solution HNO to the sample powder 3 (aq) Acidolysis is carried out, after sealing, heating at 160° C. in an oven for 12 hours until the sample is completely dissolved, and then centrifugally evaporated to dryness;

[0021] 3) Add 3ml of 2.5M hydrochloric acid solution HCl(aq) to dissolve, and extract 3ml of pure solution after centrifugation;

[0022] 4) Use cation exchange resin Dowex 50W×8 (200 mesh) to separate strontium and other ions.

[0023] 5) The samples treated above are determined by MC-ICP-MS 87 Sr / 86 Sr ratio, corrected for mass fractionation standards 86 Sr / 88 Sr=0.1194, the result of Sr isotope standard material NBS987 is 87 Sr / 86 Sr=0.7063, the test err...

Embodiment 2

[0025] 1) Grind the soil sample into powder with a ball mill, pass through a 0.075mm sieve, weigh 0.15g of the powder sample, add 0.75g 84 Sr diluent, placed in a low pressure sealed Teflon tank;

[0026] 2) Add 3ml of 25% concentrated hydrofluoric acid solution HF(aq) and 2ml of 3mol / L concentrated nitric acid solution HNO to the sample powder 3 (aq) carry out acidolysis, heat in an oven at 170° C. for 18 hours after sealing until the sample is completely dissolved, and evaporate to dryness by centrifugation;

[0027] 3) Add 4.5ml of 2.5M hydrochloric acid solution HCl(aq) to dissolve, and extract 4.5ml of pure solution after centrifugation;

[0028] 4) Use cation exchange resin Dowex 50W×8 (300 mesh) to separate strontium and other ions.

[0029] 5) The samples treated above are determined by MC-ICP-MS 87 Sr / 86 Sr ratio, corrected for mass fractionation standards 86 Sr / 88 Sr=0.1194, the result of Sr isotope standard material NBS987 is 87 Sr / 86 Sr=0.7172, the test ...

Embodiment 3

[0031] 1) The soil sample was ground into powder with a ball mill, passed through a 0.1mm sieve, weighed 0.2g of the powder sample, added 0.1g of 84Sr diluent, and placed it in a low-pressure sealed Teflon tank;

[0032] 2) Add 4ml of 25% concentrated hydrofluoric acid solution HF(aq) and 3ml of 3mol / L concentrated nitric acid solution HNO to the sample powder 3 (aq) Acidolysis is carried out, after sealing, heating in an oven at 180°C for 24 hours until the sample is completely dissolved, and then centrifugally evaporated to dryness;

[0033] 3) Add 6ml of 2.5M hydrochloric acid solution HCl(aq) to dissolve, and extract 6ml of pure solution after centrifugation;

[0034] 4) Use cation exchange resin Dowex 50W×8 (400 mesh) to separate strontium and other ions.

[0035] 5) The samples treated above are determined by MC-ICP-MS 87 Sr / 86 Sr ratio, corrected for mass fractionation standards 86 Sr / 88 Sr=0.1194, the result of Sr isotope standard material NBS987 is 87 Sr / 86 ...

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Abstract

The invention relates to the technical field of cultural relic detection. The invention discloses a soil impurity removal method for strontium isotope detection, which comprises the following steps: removing impurities from soil by using a concentrated hydrofluoric acid solution and concentrated nitric acid solution system, grinding a soil sample into powder by using a ball mill, sieving, weighingthe powder, adding an 84Sr diluent, and putting into a low-pressure sealed Teflon tank; adding a concentrated hydrofluoric acid solution and a concentrated nitric acid solution into the powder for acidolysis, sealing, heating in a drying oven until the sample is completely dissolved, centrifuging and evaporating to dryness; adding a hydrochloric acid solution for dissolving, centrifuging and extracting a pure solution; separating strontium and other ions by adopting cation exchange resin Dowex50W * 8. The method has the characteristics of quickness, convenience, accuracy, effectiveness and the like in removal of impurities in soil in strontium isotope detection.

Description

technical field [0001] The invention relates to the technical field of cultural relic detection, in particular to a soil impurity removal method for strontium isotope detection. Background technique [0002] my country is the first country in the world to plant mulberry, raise silkworms, reel silk, and weave silk, but the vast literature can only testify that the production and dissemination of silk dominated the ancient manufacturing industry and luxury trade; and about the origin of silk And the myths and legends that spread are unconvincing. In this case, we need to establish a stable, effective and scientific method for traceability of silk. An isotope is a series of atoms that have the same number of protons in their nuclei but different numbers of neutrons. Isotope traceability technology mainly establishes a relationship with the place of origin, which can not only distinguish biological products of different types and sources, but also is a more direct and effective...

Claims

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Application Information

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IPC IPC(8): G01N1/34
CPCG01N1/34
Inventor 彭志勤黄诗莹何宇杰王晓云万军民王秉
Owner ZHEJIANG SCI-TECH UNIV
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