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peroxide and catalytic minerals

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  • Rob Kimmich
    Charles, can you explain a bit more about what the minerals would catalyze that would be toxic? Thanks. -Rob
    Message 1 of 1 , Apr 30 12:44 AM
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      Charles, can you explain a bit more about what the minerals would catalyze that would be toxic? Thanks.  -Rob

      On Sun, Apr 29, 2012 at 11:16 PM, charles suslavage <suslavage@...> wrote:
       

      Hi Rob,
      The problem is not with the hydrogen Peroxide but with the material that is being oxidized. You never know if there is catalytic minerals in the sample.
      Charles

      From: Rob Kimmich <kimmich46@...>
      To: diatom_forum@yahoogroups.com
      Sent: Sun, April 29, 2012 6:05:19 PM
      Subject: Re: [diatom_forum] Diatoms of the Arid Southwest

       

      Charles, actually I use it in a bathroom with a ceiling vent fan. Perhaps wrongly I have been assuming that peroxide breaks down to water and oxygen, oxidizing the organic material. It does have a peroxide smell while cooking. What would be the toxic part?  -Rob

      On Sun, Apr 29, 2012 at 5:25 PM, charles suslavage <suslavage@...> wrote:
       

      Hi Rob,
      Don't do that in the house! H2O2 fumes are toxic!!
      Charles


      From: Rob Kimmich <kimmich46@...>
      To: diatom_forum@yahoogroups.com
      Sent: Sun, April 29, 2012 2:38:38 PM
      Subject: Re: [diatom_forum] Diatoms of the Arid Southwest

       

      Dick,

      Maybe it's more than you need right now but H2O2 labeled 35% that I get at the health food store is producing satisfying results, at least for me. After the usual sieving I have been gently boiling samples for at least 3 hrs. Of course, there are multiple rounds of settling and swirling and diluting after. I am getting away with this in the house at the moment.

      -Rob

      On Sun, Apr 29, 2012 at 7:22 AM, Richard Carter <rcarter68502@...> wrote:
       

      David,

      Yes, I'll be quite happy to look at the slides from Texas, as long as you can put up with a fair bit of uncertainty in the ID's.  I'll probably be using "cf." a lot, but I suppose that's better than no ID at all.  Do use the plastic mailers (5-cell variety, not singles!) to send them -- I received a few more slides lately that were sandwiched in cardboard, all smashed.  If you don't have these mailers, let me know and I'll send you a couple.

      I also double posted a message during that interval, so I know exactly what you mean.

      I'm sorry to hear that you are considering "throwing in the towel" also.  It is indeed a hard decision to make!  Before I give up my slides and library I'll just be giving it a rest for a bit, to see how I feel a ways down the road.  I will be finishing up the New Mexico samples for sure.  I'm eager to get it done, as well as many Arizona samples that I've collected, but I simply can't do the cleaning with Rachel at home -- she gets really upset with boiling acid, even if it's in a far corner of the back yard.  I'll just have to get her out of the house more -- send her shopping, ha ha!  (The path that leads to bankruptcy, and residence in a cardboard box behind Walmart.....) 

      I have almost finished one sample from a lake in the White Mountains that I had high hopes for, as the sample contained a desmid indicative of softer, less alkaline water.  I was hoping to get some Eunotia spp., but no such luck.  Tons of diatoms, but mostly Epithemiaceae, lots of Cocconeis, and others of the "usual suspects".  The sample still needs to be screened of fine crud before I make permanent slides.  One of your samples will be finished after screening, also.

      Regards,

      Dick


      From: David Richman <tithonia65@...>
      To: diatom_forum@yahoogroups.com
      Sent: Sunday, April 29, 2012 6:38 AM
      Subject: [diatom_forum] Diatoms of the Arid Southwest

       
      Dick, et al.

      As I have not heard from you or anybody else in regard to my
      (unfortunately) double message (the forst one was not posted by Yahoo
      for hours and then showed up AFTER I reposted) I'm not sure that
      anybody got it.

      To sum up - Andy Potter should have the slides ready soon. Are you
      still willing to look at them? I have contacted the California
      Academy of Sciences and they will take the left-over material.
      Unfortunately the Lake Lucero sample had nothing in it, but I think
      the rest may well be interesting. There should be at least ten or so
      slides, mostly from West Texas.

      As I said in my delayed message, I may have to make a hard decision
      soon. With Mac gone and my options somewhat limited by circumstances I
      may be throwing in the towel. I've enjoyed this very much and my
      associations with various diatomists has been very fruitful. However
      I am getting very little done lately in this and I would rather the
      library and equipment be used than sit around.

      David Richman





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