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Configuring the GC/MS System for Pesticide Analysis Column and Temperature Settings The column oven parameters below are intended to be used as a starting point. Adjust them as required by your compounds and matrices. Table 13. Oven Temperature Program Parameters Setting Start 90 °C Hold Time 5 min Number of Ramps 3 Rate 1 25 °/min to 180 °C Rate 2 5.0 °/min to 280 °C Rate 3 10.0 °/min to 300 °C Hold Time No Parameter Table 14. Column and Temperature - MS Transfer Line Parameters Setting Temperature 250 °C Parameter Thermo Scientific Pesticide Analyzer Reference 39
Configuring the GC/MS System for Pesticide Analysis Table 15. Column Parameters Setting Supplier Type Dimensions Pre-column Parameter Thermo Fisher Scientific Thermo Scientific TRACE TR-Pesticide (PN 26RF142F) 30 m x 0.25 mm ID x 0.25 μm film with 5 m integrated guard column Tip Use the integrated guard column in the MS transfer line. The empty guard column in the transfer lines keeps the background low and guarantees optimum chromatographic integrity. 1 m x 0.53 mm ID (optional) for easy exchange with dirty matrix samples For matrix samples (e.g. from QuEChERS sample prep), use an empty pre-column of Siltec deactivated silica tubing (PN 260G401P). Connectors SilTite Mini-Unions (PN 073550) Tip Mini-unions of low thermal mass are a durable and easy to handle connection. Check for leaks regularly if glass quick fit pieces are used. 40 Pesticide Analyzer Reference Thermo Scientific
Page 1 and 2: Pesticide Analyzer Reference
Page 3 and 4: © 2009 Thermo Fisher Scientific In
Page 5 and 6: Contents 4 Pesticide Analyzer Refer
Page 7 and 8: Introduction Modern analytical meth
Page 9 and 10: About This Manual This manual also
Page 11 and 12: What is a Pesticide? Pesticide Chem
Page 13 and 14: What is a Pesticide? Table 2. Pesti
Page 23 and 24: Preparing Samples Preparing Samples
Page 25 and 26: Preparing Samples Extracting Sample
Page 27 and 28: Preparing Samples 5. Place the tube
Page 29 and 30: Preparing Samples Exchanging Solven
Page 31 and 32: Preparing Samples 5. Centrifuge the
Page 33 and 34: Setting Up a Method 9. Now you can
Page 35 and 36: Configuring the GC/MS System for Pe
Page 43: Configuring the GC/MS System for Pe
Page 53 and 54: List of Pesticide Compounds Table 2
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List of Pesticide Compounds Table 2
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List of Pesticide Compounds Table 2
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SRM Method Library Table 27. Compou
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References References 1. Anastassia
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