Intracellular magnesium ion selective microelectrode based on a neutral carrier.
A magnesium ion selective microelectrode based on a synthetic neutral carrier is presented. The selectivity of Mg2+ over Na+, K+, H+, and Ca2+ is sufficient for assays of intracellular magnesium ion activities. The microelectrodes with an optimized membrane composition have a resistance of about 5 x 10(10) omega and a 90% response time of less than or equal to 3 s for a tip diameter around 1 microns. The lifetime of the microelectrode cell assembly is longer than 1 week and the emf drift after equilibration is less than or equal to 0.3 mV/h.
Hu
Z M
ZM
Bührer
T
T
Müller
M
M
Rusterholz
B
B
Rouilly
M
M
Simon
W
W
D000818:Animals; D006168:Guinea Pigs; D008274:Magnesium / Q000032:analysis*; D008839:Microelectrodes; D009132:Muscles / Q000032:analysis*; D011199:Potentiometry
D008274:Magnesium