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Old 24-08-2011, 08:42 AM   #1
kutekoi
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Default Where to buy PH 4 and 7 solution for PH Meter Calibration?

Dear sifus,

Using a Dymax P20 test pen which I suspect is out of calibration after long use.

Where can I buy the PH 4 and 7 solution in the east side of Singapore?

Many thanks in advance.

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Old 24-08-2011, 09:37 AM   #2
sfchoong
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C328 selling
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Old 24-08-2011, 10:31 AM   #3
RtG_faNaTic
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east side u can try out at sera center.. its located at macpherson road.. or seaview near jalan kayu there...
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Old 26-08-2011, 04:01 AM   #4
lizhien
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Seaview have. Look for ph7 buffer solution
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