The detection of trace organic substances in the environment requires use of highly purified solvents for all stages of analysis, starting with sample preparation.
The BDH Prolabo Pestinorm capillay GC grade solvents, including very high purity purge & trap grade methanol, have extremely low organic and halogenated derivatives, to prevent contamination.
Evaporation residue less than 5 ppm.
Impurities causing interfering peaks on gas chromatogram are not greater than :
- 5 ng/l of Lindane by electron capture detection
- 10 ng/ml of Octanol by flame ionization detection for capillary GC grade solvents
- 0.5 ppm of 2-Butanone by GC-MS detection for methanol purge & trap
Certificates of analysis are readily available on the VWR website