Underground water chlorine isotope mass spectrometry method based on two-way sample injection
A technology of isotope mass spectrometry and analysis method, which is applied in the field of groundwater isotope analysis and can solve the problems of insufficient reference gas pressure products and other problems
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Embodiment 1
[0030] Embodiment 1 Analytical pure chlorine isotope test
[0031] 1) AgCl preparation process: Use a pipette gun to draw 20ml of the prepared analytical pure solution into a 50ml beaker, acidify the prepared solution to pH~2 with ultra-pure nitric acid and heat at 80°C for 5-10 minutes, Then add 1ml KNO 3 Solution, then add 0.0004mol anhydrous disodium hydrogen phosphate and 0.0098mol citric acid monohydrate to buffer pH ~ 2, add 1ml0.2MAgNO 3 Solution to precipitate AgCl, store the beaker in a dark place overnight to allow the solution to precipitate completely, then transfer the resulting precipitate to an amber vial and let it stand, then rinse with 5% HNO 3 Rinse 3-5 times, then dry the sample in an oven for 24 hours, and store the dried sample in a dark place until the preparation of CH 3 Cl.
[0032] 2) CH 3 Cl preparation process: first weigh the AgCl prepared from the sample into the 20ml amber vial where the reaction occurs, and use a pipette gun to add CH with a...
Embodiment 2
[0039] Embodiment 2 standard sample chlorine isotope test
[0040] 1) AgCl preparation process: use a pipette gun to draw 20ml of the prepared standard solution into a 50ml beaker, acidify the prepared solution to pH~2 with ultra-pure nitric acid and heat at 80°C for 5-10 minutes, then Add 1ml KNO 3 Solution, then add 0.0004mol anhydrous disodium hydrogen phosphate and 0.0098mol citric acid monohydrate to buffer pH ~ 2, add 1ml0.2MAgNO 3 Solution to precipitate AgCl, store the beaker in a dark place overnight, make the solution precipitate completely, then transfer the resulting precipitate to an amber vial and let it stand, then use 5% HNO 3 Rinse 3-5 times, then dry the sample in an oven for 24 hours, and store the dried sample in a dark place until the preparation of CH 3 Cl.
[0041] 2) CH 3 Cl preparation process: first weigh the AgCl prepared from the sample into the 20ml amber vial where the reaction occurs, and use a pipette gun to add CH with a concentration 8 tim...
Embodiment 3
[0048] The chlorine isotope test of embodiment 3 groundwater sample
[0049] 1) AgCl preparation process: use a pipette gun to draw 20ml of the treated groundwater sample solution into a 50ml beaker, acidify the prepared solution to pH~2 with ultra-pure nitric acid and heat at 80°C for 5-10 minutes, Then add 1ml KNO 3 solution, then add 0.0004mol anhydrous disodium hydrogen phosphate and 0.0098mol citric acid monohydrate to buffer pH ~ 2, add 1ml 0.2M AgNO 3 Solution to precipitate AgCl, store the beaker in a dark place overnight, make the solution precipitate completely, then transfer the resulting precipitate to an amber vial and let it stand, then use 5% HNO 3 Rinse 3-5 times, then dry the sample in an oven for 24 hours, and store the dried sample in a dark place until the preparation of CH 3 Cl.
[0050] 2) CH 3 Cl preparation process: first weigh the AgCl prepared from the sample into the 20ml amber vial where the reaction occurs, and use a pipette gun to add CH with ...
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