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Simdis Trouble Shooting AC Analytical Controls February 2001.

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Presentation on theme: "Simdis Trouble Shooting AC Analytical Controls February 2001."— Presentation transcript:

1 Simdis Trouble Shooting AC Analytical Controls February 2001

2 Problem areas Contamination Leaks and column septum bleed Electronic / mechanical failure

3 Baseline symptoms Ghost peaks : Contamination by septum Solvent / wash bottles in auto sampler is contaminated Wrong syringe in auto sampler

4 Baseline drift Leak Carrier gas line Improper column installation Saturated filter Carrier gas purity Column contaminated with HB components

5 Poor peak shape Column overload Bad column – liner connection Broken column Old column

6 No peaks Auto sampler / syringe problems Incorrect signal assignment Flame out No carrier gas

7 Poor Separation Bad column – liner connection Check method instrument settings – Flow too high Contaminated calibration mixture Old column

8 Reference Off spec. Contaminated solvents causes a bad blank Detector nut leak Incorrect calibration table settings Septum leak Column overload

9 Low Calibration Peaks Preparation of calibrant mixture Hydrogen / air ration on FID Detector leak Restricted FID Wrong FID jet


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