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Topic: standard chemicals for UV spectrometer- very emergency!  (Read 4101 times)

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Offline braveking

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standard chemicals for UV spectrometer- very emergency!
« on: July 24, 2009, 06:04:55 AM »
HIIII,

As I know, there are standard chemicals for UV/AAS i.e: Pb, As, Cu...

But with ion: Fe2+, Fe3+, Cl -, SO4 2, NO2 -, NO3 -, NH4 +, S 2-, Cr 3+, Cr tong, As, Fe 2+, Fe 3+, COD .. Are there standard ion for analysing them in a water sample or crude oil sample? and Where I could buy or order them?

thanks and best regards,

Offline Mansouri

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Re: standard chemicals for UV spectrometer- very emergency!
« Reply #1 on: July 29, 2009, 03:19:05 PM »
Hi,
You must create a color complex compond with this Ions , then detect its landa max , and then create a calibration curve to detect your unknown sample conc.
have a fun ...
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Offline braveking

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Re: standard chemicals for UV spectrometer- very emergency!
« Reply #2 on: August 03, 2009, 09:58:41 PM »
hii

Would you mind telling more detail about procedure: mixture ion to produce complex compound?

Thans very much!

Offline Mansouri

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Re: standard chemicals for UV spectrometer- very emergency!
« Reply #3 on: August 05, 2009, 02:34:41 PM »
Hi,
You can use cyanide (CN) ions and so on, FeCN complexes in various concentrations of iron have various coolers,
now you have a range of concentrations and also a range of colors,
plot the calibration curve , add the same amount of CN ion to you sample ,a red color is appear , now determin it by UV , and calculate its concentration by use of calibration curve.
have fun  ;)
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