Todd Stuhr and Matthew Yong

In this experiment concentrations for selected pesticides sometimes found in oranges was determined via GCMS using a DB-5 column in a 6890N network GC system with GEOL JMS-600H electron impact MS with the use of HPS MX autoloader by 2 uL injection. A detection limit realized was 1 ppm (ideal expected at low ppb). Standards for the calibration were determined for: 50, 100, 200, 400 ppb. Orange peel sample concentrated by SPE (solid phase extraction) using primary-secondary amine (PSA) and was analyzed by double replication. Results were indeterminable. Expected concentration of organic oranges are below 100 ppb for the non-organic to be above.