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Stabilizing Si with HF and acid digestions
I recently ordered a 1000 ppm standard of SiO2 for testing on my MP-AES. The label on the standard says there is trace amounts of hydrofluoric acid; does this help the Si stay in solution? If so, are you aware of how accurate an acid digestion for Si would be without the use of HF?
Created: 08/28/18 11:05:15
Created By: "admin"
2 157
Stabilizing Si with HF and acid digestions
I recently ordered a 1000 ppm standard of SiO2 for testing on my MP-AES. The label on the standard says there is trace amounts of hydrofluoric acid; does this help the Si stay in solution? If so, are you aware of how accurate an acid digestion for Si would be without the use of HF?
Posted: 09/06/18 22:19:12
Mercury containers, stability, and contamination from glass
I was looking at the two ICP-MS Hg standards (10 ppm) you offer. One in HNO3 and one in HCl. I noticed the HNO3 standard was in glass. Is there a reason for this? Do you see any issues for trace metal analysis that is running simultaneously on an ICP-MS? We run very low levels of metals with our Hg analysis on the ICP-MS and I’m concerned about the glass container. Thanks for your help!
Created: 08/30/18 20:58:47
Created By: "admin"
1 267
Mercury containers, stability, and contamination from glass
I was looking at the two ICP-MS Hg standards (10 ppm) you offer. One in HNO3 and one in HCl. I noticed the HNO3 standard was in glass. Is there a reason for this? Do you see any issues for trace metal analysis that is running simultaneously on an ICP-MS? We run very low levels of metals with our Hg analysis on the ICP-MS and I’m concerned about the glass container. Thanks for your help!
Posted: 08/30/18 21:01:12
Stabilizing mercury (Hg) with gold (Au)
I am writing to get your input on the role of gold towards the stabilization of mercury. In the following link and subsequent EPA report it states that gold acts as a stabilizer for mercury. Can you please suggest if there are any ratios (either atomic or %) between Hg and Au to achieve maximum stability without the addition of too much Au? https://www.inorganicventures.com/sites/default/files/mercury_preservation_techniques.pdf Our range of Hg measurement is 0.05-20 ppb (ng/mL) for samples subjected to a 250 deg C microwave digestion at 40 bar pressure. Thank you, Looking forward to hearing from you.
Created: 08/30/18 21:02:57
Created By: "admin"
1 469
Stabilizing mercury (Hg) with gold (Au)
I am writing to get your input on the role of gold towards the stabilization of mercury. In the following link and subsequent EPA report it states that gold acts as a stabilizer for mercury. Can you please suggest if there are any ratios (either atomic or %) between Hg and Au to achieve maximum stability without the addition of too much Au? https://www.inorganicventures.com/sites/default/files/mercury_preservation_techniques.pdf Our range of Hg measurement is 0.05-20 ppb (ng/mL) for samples subjected to a 250 deg C microwave digestion at 40 bar pressure. Thank you, Looking forward to hearing from you.
Posted: 08/30/18 21:04:35
Neutralizing HF with triethanolamine
Dea sirs, Thank you for the great online guides and research papers. They are extremely informative. In part 6 of the ICP Operations Guide, Dr. Paul Gaines mentions the use of triethanolamine to neutralize HF. Can you or anybody else provide more detail? For example, how much TEOA should one use after digestion with HF/HNO3? Also, what is the addition of H4EDTA for and is it necessary? Thank you for any assistance.
Created: 08/30/18 21:05:18
Created By: "admin"
1 266
Neutralizing HF with triethanolamine
Dea sirs, Thank you for the great online guides and research papers. They are extremely informative. In part 6 of the ICP Operations Guide, Dr. Paul Gaines mentions the use of triethanolamine to neutralize HF. Can you or anybody else provide more detail? For example, how much TEOA should one use after digestion with HF/HNO3? Also, what is the addition of H4EDTA for and is it necessary? Thank you for any assistance.
Posted: 08/30/18 21:06:01