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- Take a 5 cc headspace sample from every sediment core (non-basement), at the top of a section (try to be consistent). This sample is taken until the total depth objective is met. If doing multiple holes, you do not have to repeat the sampling if a headspace sample has already been taken at that depth but just continue after the prior hole's bottom depth.
- For cores with IW samples, always take the headspace sample adjacent to IW, best from the top of the section immediately below the IW sample. Note the core, section and interval of the headspace sample and write it on the Curator's logsheetheadspace vial. The interval will need to be entered into SampleMaster by the Curator/ALO.
- Make sure nobody sprays acetone on the catwalk before sampling is completed. Acetone will contaminate the sample.
- It is recommended to occasionally take a sample of the air on the core deck, so that any change in the headspace sample analysis can be correlated to changes in volatilized acetone.
- Inject a standard (corresponding to concentrations seen in the recent cores) every fifty injections or so, to check on the instrument calibration.
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