Table 1.
GC/MS conditions used for the analysis of organotin compounds.
| Instrument conditions | |
|---|---|
| Temperatures | |
| Injector temperature programme | 40° C, held for 1 min |
| Ramp 1 | 300° C at a rate of 600° C min−1, held for 1.9 min |
| Ramp 2 | 200° C at a rate of −10° C min−1, held for 1 min |
| Final | Inlet cooled to 40° C |
| Oven programme | 35° C for 1.5 min |
| Ramp 1 | 15° C min−1 to 300° C (hold 2 min) |
| MS interface | 280° C |
| Injection conditions | |
| Injector | PTV-LVI |
| Syringe volume Injection volume |
100 μL 50 μL |
| Injection speed | 1 μL s−1 |
| Flow rates | |
| Carrier gas | Helium |
| Injector mode | PTV solvent vent |
| Purge flow to split vent | 50 mL min−1 |
| Vent | 100 mL min−1 |
| Inlet pressure | 0.479 psi until 0.81 min |
| Gas saver | 20 mL min−1 after 2 min |
| Column flow rate | 2.5 mL min−1 |
| Columns | |
| Guard column | Non-polar Rxi® retention gap (1 m × 0.25 mm i.d.) |
| Analytical column | HP5-MS (30 m × 0.25 mm × 0.25 μm film thickness) |
| Mass spectrometer conditions | |
| Mode | Electron ionisation (70 eV) |
| Solvent delay | 8 min |
| EMV mode | Relative |
| Acquisition mode | Selected ion monitoring |
| Dwell time | 20 (ms per mass) |