Sample Preparation
Neat Preparation
Neat samples were analyzed directly out of the vial or off of the sample, i.e., condoms.
- DART-HRMS: The closed end of a micro-capillary tube was dipped into the sample prior to instrument introduction.
- FT-IR: 2 uL of the sample was pipetted onto the ATR crystal for analysis.
Extract Preparation
Based on the individual needs of each instrument, the extracts were prepared accordingly:
- DART-HRMS: 10,000 ppm w/v extracts solutions of each sample was prepared in either methanol or hexane by weight for DART analysis.
- GC-MS: 10,000 ppm w/v stock solutions of each sample was prepared in either methanol or hexane and diluted to 1,000 ppm for GC-MS analysis. All 1,000 ppm extracts were prepared with a 10 ppm v/v tetrachlorethylene internal standard (IS).
- FT-IR: 80,000 ppm w/v extracts solutions of each sample was prepared in either methanol or hexane by weight for FTIR analysis.
|
|