MRC INE-PHS-3E - Common Problems and Solving

INE-PHS-3E 2016
11
Notes:
1:Tetrachloro-methane, trichloroethylent, furnaidine etc. can't be selected as
detergent, because they will dissolve polycarbonate resin, the shell of the electrode
is made of polycarbonate resin, glass bulb will easily be polluted if the shell is
dissolved. And the electrode will lose effectiveness. Combination electrode can't
be used to measure the above solution, either.
2: When using pH combination electrode, the most possible problem will be liquid
interface of out reference electrode, block in liquid interface is the main cause of
measuring error.
3: when measured solution is PH 10.00, please select buffer solution pH 10.01.
4: when measured solution is PH 4.50, please select buffer solution pH 4.01.
7 COMMON PROBLEMS AND SOLVING
Polluting substance detergent
Inorganic metal oxide below 1 mol/L weak acid
Organic fat or oil substance weak detergent (weak alkalinity)
Resin high polymer alcohol, acetone, ether
Protein blood cell sediment 5% stomach proteinase + 0.1 mol/L HCl solution
Pigment substance weak bleaching liquid, peroxy-hydrogen
If the users need to measure oxy-reduction potential (ORP) or measure relevant ion
electrode potential, please select to purchase electrode transducer and relevant ion
electrode.