Electrodes with plastic membranes

 

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Electrodes with plastic membranes - series 35

The electrodes have sensitive membranes, formed by a polymeric matrix, in which an active substance is anchored. The connection of the sensitive membrane to the coaxial cable is effected by means of liquid contact. The electrode body is made of plastics. The modern design of ion-selective electrodes with a PVC membrane enables very quick replacements of the complete electrode system mounted in exchangeable module. From the point-of-view of the chemical resistivity, the electrode body is highly resistant against the normally used organic solvents, mineral acids and bases. Exchangeable modules for this series are supplied separately.

Table of electrodes parameters

Electrode	Type number	Tempe- rature range [°C]	Max. elect. resist. [MOhm]	Conc. range [mol/l]	pH range  for direct potenciom.	ISA/pH electrolyte	Interference Ki,jpot
fluoroborate	05-35	0-40	1	10-1-10-6	4-10	NaH2 PO4 NH4F	F-=8.10-5, Cl-=2.10-4, Br-=2.10-3, I-=2.10-1, CH3COO-=9.10-1, ClO4-=9, SCN-=4, NO3-=2.10-2, HCO3-=2.10-4,  SO42-<10-5, H2PO4-<10-5, NO2-=9.10-4
nitrate	07-35	0-40	1	10-1-10-6	4-10	NaH2 PO4 Na2SO4	Cl-=5.10-3, Br-=8.10-1, I-=10, ClO3-=2, HCO3-=4.10-4, CH3COO-=6.10-4,  NO2-=4.10-2
ammonium	11-35	0-40	10	10-1-10-5	4-10	MgCl2	K+=1,3.10-1, Rb+=4,8.10-2, Cs+=4,2.10-3, Na+=3,2.10-3, H+=3,7.10-4
potassium	19-35	0-40	1	10-1-10-6	4-10	NaCl	Na+=2.10-4, NH4+=2.10-2, Rb+=2,1,  Cs+=10-1, Li+=8.10-5, H+=4.10-4
calcium	20-35	0-40	1	10-1-10-6	5-9	KCl	Ba2+= ~10-5, Mg2+=5.10-5, Sr2+=1,4⋅10-3, K+= ~10-6, Na+=5.10-5, Li+=5.10-3
barium	56-35	0-40	1	10-1-10-6	4-10	LiCl	Li+=4,7.10-4, Na+=10-3, K+=2.10-3, Rb+=7.10-4, Cs+=8.10-4, NH4+=2.10-4, Ca2+=8.10-4, Sr2+=2.10-1, Mg2+=10-6
perchlorate	81-35	0-40	1	10-1-10-6	4-10	NaH2 PO4 Na2SO4	Cl-=3.10-4, Br-=6.10-4, NO3-=2.10-3,  I-=2.10-2, F-=3.10-4

The modules with added designation M

The electrodes with plastic membranes of the series 35 are delivered in construction version with an exchangeable module. These modules are also delivered separately, so that the customer can replace only the module, in case the function of the electrode is getting worse. The modules are delivered individually, to all electrodes with plastic membranes, and are designated by a letter M in our price lists.

 

Monokrystaly, s.r.o, Přepeře 297, 512 61 Přepeře, Czech republic
Tel: +420 481 325 857, Tel/Fax: +420 481 313 200, Mobile: +420 775 325 857