Metrohm IC Net 2.3 Bedienungsanleitung PDF herunterladen (Seite 285)

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7.3 Method setup

IC Net 2.3

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Start delay Time delay before starting data acquisition

in min.

Detector name User-defined detector name.

Data acquisition source Measuring channel (read-only).

7.3.3 Filters

Tab Filters of Method setup window with parameters for noise filtra-

tion of raw data. Three different filtration algorithms are available

to reduce noise and increase apparent signal-to-noise ratio.

Spikes Spikes filter. The Spikes filter smoothes

the first and last points of the chroma-

togram and the points identified as spikes.

The spike is exchanged with half of the sum

of two neighboring signal values.

Slit Median Median filter. Performs filtration if non-zero

smoothing degree is entered. Smoothing

degree should be a natural number. The

values within the window are sorted by in-

creasing response level and the response

corresponding to the middle of the window

is replaced with the value in the middle of a

sorted array. This method affects chroma-

tographic peaks in minimal extent, im-

proves baseline and eliminates single-point

spikes. In this case the spike will be re-

placed with one of the neighboring points.

Slit Gaussian Gauss filter. Performs filtration if non-zero

smoothing degree is entered. The sum of

all window points with Gaussian weights

distribution is calculated and is used as a

new raw data value. The peaks become a

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