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09/12/2014, 12:57 AM | #51 |
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09/12/2014, 01:11 AM | #52 | ||
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Many peer reviewed publications, might not even show LODs, accuracy, the machine actually used! Hence why I find it difficult to believe the numbers written in a lot of aquatic based blogs. Even if the references used were taken in the last 50 years! Still I think 1-3 ppb is low enough to flag up some kind of copper contamination?? |
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09/12/2014, 01:36 AM | #53 | |
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however i do admit to not factoring this in when cross checking salt samples for exsample as to which is the purest for our use human nature i guess! though i do understand your points, ultimatly we are hobbiests, and though not perfect, its the best we have i am not a triton user, i use my own 3 part which is the same thing only without a premium. I do not believe that runn8ng a tank based on the results of the icp, to tell you what potion of mainly chlorides to dose, or wether to water change is adviseable. it is also an expensive way af around the cost of 2/3rds of a bucket of salt.
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09/12/2014, 01:51 AM | #54 |
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for me is a positive thing that some industry or lab make this kind of test at low prices (here cost less then 50$ shipped in germany)
not for the precision or for calibrate perfectly water like said someone..onlt to see if some unbalance are present or some toxic metals .. also No3 and PO4 are perfectly checked.. |
09/12/2014, 04:08 AM | #55 | |
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I'd boost calcium by 100 ppm and alkalinity by a few dKH. The latter is very limiting in terms of understanding impurities, but if the alk is too high, calcium carbonate will precipitate, and potentially take impurities such as copper with it.
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09/12/2014, 04:08 AM | #56 | |
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09/12/2014, 04:31 AM | #57 | |
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09/12/2014, 11:53 AM | #58 | |
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Thank you Randy Regarding the impurities precipitation... Wouldn't it be the same to have the copper binded to something than have it dissolved in water? One guy at the audience at macna asked Ehsan Dashti if the composition of the sample wouldn't be altered due to bacterial consumption or some die-off on the one or two week shipping time frame, and he answered that it's just the same if there is something inside the vial dissolved or consumed by some bacteria, the same elements and amounts stay there... How true is that? |
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09/12/2014, 12:07 PM | #59 |
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I don't know how they treat samples to know if precipitates are redissolved or not. Solids or bacteria stuck on the inside of the container will not get tested if not dissolved before an aliquot is withdrawn from it.
I agree that inside a bacteria or not, as long as it is suspended and not filtered off, is not a concern.
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09/12/2014, 12:18 PM | #60 | |
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Great Randy thanks.. I will be sending many samples: 1. Water from the tank 2. Water + Calcium additive 3. Water + Alk additive 4. Water + Mg additive 5. Fresh mix of Instant Ocean + 0tds water |
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09/12/2014, 12:31 PM | #61 |
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would it not be easier to contact the supplier of thd chemicals and ask for a typical coa?
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09/12/2014, 12:45 PM | #62 |
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09/12/2014, 01:44 PM | #63 |
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in the early days no
everything has specification, coa are a little harder to find
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09/12/2014, 01:58 PM | #64 |
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09/12/2014, 03:23 PM | #65 | |
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09/18/2014, 10:05 PM | #66 |
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Just checked triton error correction guidelines but I cannot see nitrogen in there... Do anybody know if they actually test for nitrogen or nitrates?
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09/19/2014, 03:08 AM | #67 |
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nitrate is tested on hplc not icp
along with fluoride and chloride
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09/19/2014, 06:31 AM | #68 |
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Triton vs zeolit on 400l system !!
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09/19/2014, 06:34 AM | #69 | |
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Triton vs zeolit on 400l system !!
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Just received confirmation on this from triton directly... It is an additional test, costs the same and only tests for thise 3 things. |
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09/19/2014, 11:54 AM | #70 |
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a question for those who play with this kond of technology
why are these 3 elements not tested on icp like the rest? iodine is so why not other halogens also wonder if nitrate is testable? being honest i find the chloride reading of interest but from what i saw of hlpc results in the early days in the uk i could not trust the number nearly as much as sodium on icp. fluoride is probably of a bit more consequence in the early days i mentioned it was before icp was known to be available from triton, more was tested including calcium and magnesium and (probably if memory serves) potassium and strontium. I dont deny i was a little unimpressed by both the testing and the methods potential given this.
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09/20/2014, 08:49 AM | #71 |
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You cannot distinguish nitrate by ICP from any other nitrogen-containing chemical, and you need a special method/instrument to remove N2 gas from the air and sample.
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09/21/2014, 03:29 PM | #72 |
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I think I mentioned earlier the conversation I had with Ehsan about chloride and ICP. The same goes for fluorine. Apparently they cannot be raised in energy level enough to emit a clearly detectable "emission," for want of a better word. I imagine total nitrogen is testable because it is elemental. I'm pretty sure mitrate would be split in nitrogen and oxygen. It would be difficult to distinguish these accurately just from the air that is in the sample I imagine!
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09/21/2014, 03:30 PM | #73 |
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Oh there you go Randy already answered that one
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09/22/2014, 03:44 AM | #74 | |
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