Table 1.

Summary of electrode performance and comparison with PVC ISEs.

Experiment	Electrode type	Slope [mV/log]	Linear Range [log(K+)]	LOD [log(K+)]	Response Time [sec]
Comparison	PVC ISE	44.4±1.8	−5.5 ±0.1~ −1.3±0.3	−5.5±0.1	9±1.2
of Standard PVC ISE	350µm Teflon® aperture	35.1±4.4	−4.5±0.3 ~ −0.3±0.1	−4.4±0.3	16±1.5
to BLM	40 µm SU-8 aperture	20.1±0.6	−5.0±0.1 ~ −0.3±0.1	−5.3±0.1	14±3
ISEs	660 nm silicon aperture	15.8±0.1	−5.5±0.5 ~ −0.2±0.1	−5.3±0.3	20±3.4
	0.1% ionophore	7.00±0.1	−5.0±1.0 ~−0.5±0.3	−4.7±0.3	20±5.1
Comparison of	0.5% ionophore	18.8±1.7	−4.5±0.5 ~ −0.3±0.1	−4.5±0.2	20±4.7
BLM Ionophore	1.0% ionophore	20.1±0.6	−5.0±0.1 ~ −0.3±0.1	−5.3±0.1	14±3
Concentrations(a)	4.0% ionophore	18.9±0.9	−6.5±0.5 ~ −0.2±0.1	−6.5±0.1	15±2.7
	8.0% ionophore	19.1±1.1	−5.5±0.5 ~ −0.2±0.1	−6.2±0.2	16±2.5

^(a)With a SU-8 aperture of 40 µm in diameter.