General Lab Catalogue - Crison Instruments - #29

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strode please consult Before selecting an electron H s are
32
Applications for pH electrodes
30
Application Waters
With low conductivity Waste
Lab
electrode
Filling Electrode for Observations
electrolyte pH 25*
pH
CRISOLYT 50 52 Electrodes which allow a lot of contact between the
electrolyte and the sample are recommended.
CRISOLYT 50 52 Waste waters can contain elements which contaminate
the diaphragm, which is why CRISON recommends electrodes with a contamination-resistant diaphragm.
CRISOLYTA 50 40/ 50 50 Thistypeofsampledoesnotrequireaspecifictype
50 51 ofelectrode.
52 21 52 21
With average or high conductivity 52 02
Agriculture
Waters for irrigation Soils
Soils with low levels of salts Food
Soft drinks
Cocoa and derivatives
Meats, hams, delicatessen meats
Beers
Fruit and vegetables Milk
Butter, yoghourt and ice-cream Cheeses and bread dough Wines, musts and vinegars Juices and canned vegetables
Baths
Galvanising, curing and photographic use
CRISOLYTA 50 40 I Dependingonthetypeofsoil.e.g.soilwithfew CRISOLYTA 50 40/ 50 50 mineralsalts.theusermustchooseanelectrode CRISOLYT 50 52 I with a diaphragm giving a high level of contact.
52 00 52 02 52 21
CRISOLYTG 50 52 Theelectrodesrecommendedforthefoodindustry
CRISOLYT G 50 52 I require a special electrolyte, CRISOLYT G, because
— 50 53/ 50 54 thistypeofsamplenormallycontainshighlevelsof CRISOLYTG 50 52 I proteins.lnsomecasesanelectrodewithaclog-
— 50 53 / 50 54 resistant diaphragm may be necessary. In general, CRISOLYTG 50 52 alltheseelectrodesmustberegeneratedperiodically CRISOLYTG 50 52 I withanelectrode-cleaningsolutionwithpepsin.
— 50 53 / 50 54 Pointed-shaped membrane electrodes are CRISOLYT 50 52 I appropriatewherepuncturemeasurementsare CRISOLYTG 50 52 I taken.
I The main problem is the clogging of classical diaphragms
52 11 52 23
52 31 / 52 32 52 11
52 31 / 52 32 52 11
52 1 1 / 52 23 52 31 / 52 32 52 21 52 23
52 21 / 52 22 CRISOLYT
50 40 / 50 50 caused by the reaction between the electrolyte and
50 51 / 50 52 the sample. The use of electrodeswith clog-resistant diaphragm is recommended.
Biology
Gelled Agar
Small volume of sample
Colourings
Colourings and dyes
CRISOLYTA I Themainproblemisthevolumeofthesample.CRISON
CRISOLYTA I recommendselectrodeswith micro membranes.
52 07
52 08/ 52 09
CRISOLYT 50 52 Theuseofelectrodeswithclog-resistantdiaphragms
CRISOLYT ensuresthattheywill lastlonger. Itisveryimportant
I to clean the electrode after the measurement is I taken. For high orvariable temperatures, CRISON I recommends the 52 04.
52 04 52 21
Cosmetics
Emulsions, gels, creams and soaps
CRISOLYT 50 52 Thesewillnormallybeviscoussamples.orsamples
I withions which may react with the Ag+ ion.Asa result, electrodes with an Ag+- free electrolyte and I clog-resistant diaphragm are best.
I Hydrofluoric acid attacks glass. Electrodes with CRISOLYT I specificmembranesforthistypeofapplications
must be used, although without exceeding the limits I for the HF concentration.
CRISON recommends using an electrode with a diaphragm CRISOLYT A I which provides a high level of contact between the
CRISOLYT 50 52 I electrolyte and the sample.
In some cases a surface electrode, with a flat membrane, I must be used.
52 21
Hydrofluoric acid
Solutions with a content of HF, < 1 g/l
52 06
Gels
For electrophoresis Viscous solutions
52 07 52 21
Paper
Paper, cardboard and fibres. Paper pulp or paste
CRISOLYT A I The use of an electrode with a flat membrane
CRISOLYT 50 52 I makes direct measurement on paper easier. A drop
I of distilled water must be used to ensure contact.
52 07 52 21
Laboratory Catalogue 2004 1st Edition

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