Boomer - calcium testing unit

[Marc Levenson]

Can you take a look at these and let me know if they are worth it or
not? A guy in our club was considering buying one, and I figured you'd
know the score.

http://www.hannainst.com/products/ion/93752.htm#Spec:
http://www.bio-world.com/MoreInfo.asp?ItemCode=061251

Thanks!

Marc


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[Pszemol]

"Marc Levenson" > wrote in message ...
> Can you take a look at these and let me know if they are worth it or
> not? A guy in our club was considering buying one, and I figured you'd
> know the score.
>
> http://www.hannainst.com/products/ion/93752.htm#Spec:
> http://www.bio-world.com/MoreInfo.asp?ItemCode=061251

"HI 93752 measures calcium concentration from 0 to 400 mg/L and magnesium from 0 to 150 mg/L"

Will you dilute sample 1:1 to get into the range for Calcium and 1:10 to get in range for Magnesium?

Will it work in sal****er at all? From the description I get it is designed for freshwater....

Interesting meters, but lets wait for Boomer :-)

[Boomer]

Marc & Pszemol

It MAYBE OK. This test does not follow the same rules for NaCl interference, like the
other ones we discussed, NO3, NO2 . HACH and La Motte do not make a spectro that goes this
high. Matter of fact, they do not even make a small hand held like these to measure Ca or
Mg at all. They limit theirs to only a few mg / l and that is on the really big spectro's.
I don't see any ions one needs to be worried about that would interfere. Obviously, it may
not do to well for Mg. There is the dilution factor but a dilution factor of 10-1 is
pushing it waaayyy .............to much. I will call them tomorrow for a talk :-) As I
tried to convey before . Some of these units can and will work in seawater quite well, as
there are no ion inferences to worry about, such as Phosphate, Si and Cu. and even DO. It
is an interesting toy :-) The PDF on it does say "in water and wastewater" no mention of
seawater.

Ok another L@@K at the PDF guys. Sorry, it is a no go :-(

Testing for Ca

Interferences;
...............................................con centration .........reading
Acidity (as CaCO3) above .....1000 mg/L ...........lower.............OK
Alkalinity (as CaCO3) above ..1000 mg/L ...........higher.............OK
Magnesium (Mg2+) above ......400 mg/L............. higher.............Seawater is 3 times
this

Testing for Mg

Interferences:
..............................................conc entration ..........reading
Acidity (as CaCO3) above .....1000 mg/L............ lower.........OK
Alkalinity (as CaCO3) above ...1000 mg/L.......... higher.........Ok
Calcium (Ca2+) above .............200 mg/L ............higher........Seawater is 2 times
this


So what does this say ? If you are testing for Ca the Mg in seawater is way to high. If
you are testing for Mg the Ca in seawater is way to high.
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"Marc Levenson" > wrote in message
...
: Can you take a look at these and let me know if they are worth it or
: not? A guy in our club was considering buying one, and I figured you'd
: know the score.
:
: http://www.hannainst.com/products/ion/93752.htm#Spec:
: http://www.bio-world.com/MoreInfo.asp?ItemCode=061251
:
: Thanks!
:
: Marc
:
:
: --
: Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
: Business Page: http://www.sparklingfloorservice.com
: Marine Hobbyist: http://www.melevsreef.com
:

[Marc Levenson]

Thanks Boomer, I'll pass along the info.

Marc


Boomer wrote:
> Marc & Pszemol
>
> It MAYBE OK. This test does not follow the same rules for NaCl interference, like the
> other ones we discussed, NO3, NO2 . HACH and La Motte do not make a spectro that goes this
> high. Matter of fact, they do not even make a small hand held like these to measure Ca or
> Mg at all. They limit theirs to only a few mg / l and that is on the really big spectro's.
> I don't see any ions one needs to be worried about that would interfere. Obviously, it may
> not do to well for Mg. There is the dilution factor but a dilution factor of 10-1 is
> pushing it waaayyy .............to much. I will call them tomorrow for a talk :-) As I
> tried to convey before . Some of these units can and will work in seawater quite well, as
> there are no ion inferences to worry about, such as Phosphate, Si and Cu. and even DO. It
> is an interesting toy :-) The PDF on it does say "in water and wastewater" no mention of
> seawater.
>
> Ok another L@@K at the PDF guys. Sorry, it is a no go :-(
>
> Testing for Ca
>
> Interferences;
> ..............................................conc entration .........reading
> Acidity (as CaCO3) above .....1000 mg/L ...........lower.............OK
> Alkalinity (as CaCO3) above ..1000 mg/L ...........higher.............OK
> Magnesium (Mg2+) above ......400 mg/L............. higher.............Seawater is 3 times
> this
>
> Testing for Mg
>
> Interferences:
> .............................................conce ntration ..........reading
> Acidity (as CaCO3) above .....1000 mg/L............ lower.........OK
> Alkalinity (as CaCO3) above ...1000 mg/L.......... higher.........Ok
> Calcium (Ca2+) above .............200 mg/L ............higher........Seawater is 2 times
> this
>
>
> So what does this say ? If you are testing for Ca the Mg in seawater is way to high. If
> you are testing for Mg the Ca in seawater is way to high.

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com

[Pszemol]

"Boomer" > wrote in message ...
> Testing for Ca
>
> Interferences;
> ..............................................conc entration .........reading
> Acidity (as CaCO3) above .....1000 mg/L ...........lower.............OK
> Alkalinity (as CaCO3) above ..1000 mg/L ...........higher.............OK
> Magnesium (Mg2+) above ......400 mg/L............. higher.............Seawater is 3 times
> this
>
> Testing for Mg
>
> Interferences:
> .............................................conce ntration ..........reading
> Acidity (as CaCO3) above .....1000 mg/L............ lower.........OK
> Alkalinity (as CaCO3) above ...1000 mg/L.......... higher.........Ok
> Calcium (Ca2+) above .............200 mg/L ............higher........Seawater is 2 times
> this
>
>
> So what does this say ? If you are testing for Ca the Mg in seawater is way to high.
> If you are testing for Mg the Ca in seawater is way to high.

Boomer, have you considered that we need to dilute seawater in order
to get in the range? This way we dilute interfering ions as well...
It makes it good for Mg measurements, but it is still not good for Ca.