Chemical Stability and Compatibility - Mercury (Hg) stability in glass and HNO3

I ordered a 10 ppm Mercury in 10% HNO3 ICP-MS standard and it came in glass. I do not understand why it would be put it in glass and only HNO3 because mercury coats glass and is not stable in HNO3. I haven’t opened it yet, and I have never bought a mercury standard in glass. I have watched the concentration decrease in standards that were contained in glass because the mercury will stick to the glass. Could you please comment?

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admin Total posts: 529	Our experiences with Hg in glass containers when stabilized with HNO3 are the exact opposite of your observations, and we cannot explain your results based upon the data we have generated. The product referenced has a demonstrated chemical stability when packaged in glass of 4 years. Our research has found that storing low (<100 ppm) Hg standards in plastic with a HNO3 matrix generates a loss of Hg in solution, with adsorption to plastic surfaces the proposed mechanism. This loss of Hg in plastic has also been observed and discussed by the EPA with respect to water sampling, and is commonly observed for plastic tubing used in ICP sample introduction systems, as significant memory effects tend to occur. More information regarding Hg stability is available on our website athttps://www.inorganicventures.com/mercury-chemical-stability. Posted: 09/02/18 21:15:23

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admin Total posts: 529

Our experiences with Hg in glass containers when stabilized with HNO3 are the exact opposite of your observations, and we cannot explain your results based upon the data we have generated. The product referenced has a demonstrated chemical stability when packaged in glass of 4 years. Our research has found that storing low (<100 ppm) Hg standards in plastic with a HNO3 matrix generates a loss of Hg in solution, with adsorption to plastic surfaces the proposed mechanism. This loss of Hg in plastic has also been observed and discussed by the EPA with respect to water sampling, and is commonly observed for plastic tubing used in ICP sample introduction systems, as significant memory effects tend to occur. More information regarding Hg stability is available on our website athttps://www.inorganicventures.com/mercury-chemical-stability.

Posted: 09/02/18 21:15:23

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Chemical Stability and Compatibility - Mercury (Hg) stability in glass and HNO3

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