Sample derivatization for this technique is the primary lab application of the silicon reagents (15[1])MSTFA and BSTFA. EPA lab procedures often use purge-and-trap to extract analytes (15[1])for this technique from an area called the “headspace.” In a compound technique frequently employed (-5[1])in forensic analysis, (15[1])a mass analyzer (15[1])replaces this technique’s (15[1])usual thermal conductivity (-5[1])or flame (15[2])(*) ionization (10[1]-5[1])detector. (10[5]-5[1])After sample (-5[2])injection, (10[1])the oven temperature in this technique is gradually ramped (-5[1])or "programmed" to space out retention times. Helium, argon, and nitrogen are frequent mobile phases or “carriers” in this specific technique, which elutes (10[2])compounds (-5[1])by (10[1])their boiling (10[1])point. For 10 (10[1]-5[1])points, (10[1])name this (10[2])form of (10[2])chromatography (-5[3])used to separate (10[2])volatile (10[2])compounds in a mixture. (10[2]-5[2])■END■