McBurney attaches an aerograph
, a device that takes atmosperic readings, to a plane at U.
A Varian Aerograph
series 1400 electron-capture gas chromatograph with 63Nickel detector was used to identify and quantify pesticide residues.
Urinary filter paper spots were then cut into small pieces, shaken in 3 mL of water for 15 min at room temperature, and sonicated with an Aerograph
Ultrasonic Cleaner (Branson Instruments) for 5 min at room temperature.