Old Lady
,
Wednesday, 11th of August 2010 07:30:57 AM
Im wanting to test milk for freshness, so l have found the science about
Old Lady
how milk goes off and its PH level, what would be best to use, where l can
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test the PH scale in liquid but also use it twice or three times to test
Joined: Saturday, 22nd of May 2010, 20:49:06
the same substace?
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L.U.N.O
,
Thursday, 12th of August 2010 12:46:20 AM
With PH meter you can do that several times. There are small
L.U.N.O
hand PH meters. You can have calibrated sample solutions to calibrate your
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PH meter before doing tests.
Joined: Wednesday, 16th of June 2010, 23:02:53
But in milk PH testing is not approved as a quality testing paramter. Fat
Posts: 897
testing and density testing are easy diagnosis to know freshness and value
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of milk.
banannie
,
Friday, 13th of August 2010 10:21:40 AM
The pH meter helps to find the correct pH of any solution. You
banannie
can use either alkali or acid solutions to test pH scales.
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snow bunny
,
Saturday, 14th of August 2010 11:59:59 PM
parameter . this construction people have the using building
snow bunny
stucture doing that scale .
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mIsS sMiLeY!!
,
Sunday, 15th of August 2010 01:31:46 PM
You have two choices--pH paper or a pH meter. pH paper is only
mIsS sMiLeY!!
usable once, but you can cut it into tiny pieces for each test. A pH meter
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is infinitely usable, but often requires buffers (a solution that resists
Joined: Tuesday, 15th of June 2010, 20:58:18
pH change) at specific pH is for calibration (to make sure that it is
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reading the scale correctly).
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pH paper is very inexpensive, so I would recommend going with that.
pH paper comes in a variety of ranges. You will want something that will
measure in the 6-7 range (normal milk being about 6.7, with it becoming
more acidic when it spoils). A larger range isn't a problem--just make
sure that you can tell the color differences between those regions.
There are some homemade pH test kits that you can make (using red cabbage
dye, or things like that ), but they only test a very limited range of pH
is & are very inaccurate compared to pH paper.