Solid-phase microextraction (SPME) with a 100-µm polydimethylsiloxane film fiber was applied to the determination of methadone and 2-ethylidine-3,3-diphenylpyrrolidine (EDDP) by GC-MS in human saliva and compared with liquid-liquid extraction. A shorter extraction time of 30 min with the fiber was obtained, speeding up the total analysis time. Linearity was found for SPME from 0.05 to 2.0 µg/mL (r = 0.9976 for methadone; r = 0.9988 for EDDP) with precision between 0.7 and 4.3% for saliva spiked with 0.2 and 1.5 µg/mL of methadone and EDDP. The limit of detection using SPME was 0.04 Ég/mL for methadone and 0.008 µg/mL for EDDP. Analytical recoveries of SPME and liquid-liquid extraction ranged from 98.8 to 103.6%. The use of deuterated internal standard by both methods have yielded comparable results. Thus, the SPME method is highly accurate, precise, and useful for determination of methadone and EDDP in saliva.
固相微萃取(
SPME)采用100微米聚二甲基
硅氧烷薄膜纤维用于人类唾液中
美沙酮和2-乙基氢化-
3,3-二苯基吡咯烷(EDDP)的GC-MS测定,并与液-液萃取进行了比较。使用纤维的萃取时间缩短至30分钟,加快了总分析时间。
SPME的线性范围为0.05至2.0 µg/mL(
美沙酮的r = 0.9976;EDDP的r = 0.9988),对于添加0.2和1.5 µg/mL
美沙酮和EDDP的唾液,其精密度在0.7%到4.3%之间。使用
SPME时,
美沙酮的检测限为0.04 µg/mL,EDDP的检测限为0.008 µg/mL。
SPME和液-液萃取的分析回收率范围为98.8%到103.6%。两种方法使用
氘代内标均获得了可比结果。因此,
SPME方法在
美沙酮和EDDP的唾液测定中具有很高的准确性、精密度和实用性。