Performing A Radioactivity Leak Test (Wipe Test) - Agilent Technologies 6890 Series Service Manual

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Micro-cell Electron Capture Detector (µ-ECD)

Maintaining a µ-ECD detector

It is good practice to monitor the progress of the thermal cleaning by

plotting the µ-ECD signal. Over time, the signal baseline signal should

change as shown in Figure 341-18.

Baseline before cleaning

Figure 341-18

Check the ECD "output" value from the GC display. It should be lower

than the first reading.

Performing a radioactivity leak test (wipe test)

Micro-cell ECDs must be tested for radioactive leakage at least every 6 months.

Records of tests and results must be maintained for possible inspection by

the Nuclear Regulatory Commission and/or responsible state agency. More

frequent tests may be conducted when necessary.

The procedure used is the wipe test. A Wipe Test Kit (part no. 18713-60050)

is supplied with each new µ-ECD. Refer to the information card supplied in

the Wipe Test Kit for instructions on performing the wipe test.

Start of thermal cleaning

Agilent 6890 Gas Chromatograph Service Manual

Baseline after

6890a 6890 plus