Table 1

Comparison of the parameters of the used analysis methods
Parameter Titration F-ISE Cuvette test
Analyte HF HF Organic content
Measurement method Indirect Direct Direct
Measurement range >50 mmol L−1 0.05 to 50 mmol L−1 0.08 to 2.7 mmol L−1
Time for measurement 15 min 5 min 4 h
Time for calibration 5 mina 15 minb Only once
Suitable for acetic acid containing electrolytes? No Yes Yes
Relative error 3.3 % 1.5 % 2.1 %
Standard deviation 0.1 mol L−1(n = 10) 0.2 mol L−1(n = 10) 0.01 mol L−1(n = 20)
Inline analysis possible? Yes Yes No

aOnce a week. bDirectly before measurement.

Nehmann et al.

Nehmann et al. Nanoscale Research Letters 2012 7:398   doi:10.1186/1556-276X-7-398

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