1. Development of a simple one-pot extraction method for various drugs and metabolites of forensic interest in blood by modifying the QuEChERS method 
Shuntaro Matsuta, Keiko Nakanishi, Akihiro Miki, Kei Zaitsu, Noriaki Shima, Tooru Kamata, Hiroshi Nishioka, Munehiro Katagi, Michiaki Tatsuno, Kento Tsuboi, Hitoshi Tsuchihashi, Koichi Suzuki 
Forensic Science International 
Volume 232, Issue 1, Pages (October 2013)
DOI: /j.forsciint
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2. Fig. 1
GC–MS chromatograms obtained from a whole blood sample spiked with 8 drugs at 0.5μg/mL each, processed by the optimized method. AP, amphetamine; MA, methamphetamine; PB, Phenobarbital; FN, Flunitrazepam; ZP, zolpidem; BZ, brotizolam; PM, promethazine; and CP, chlorpromazine.
Forensic Science International  , 40-45DOI: ( /j.forsciint )
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3. Fig. 2
LC–MS chromatograms obtained from a whole blood sample spiked with 13 drugs and metabolites at 0.5μg/mL each, processed by the optimized method. AP, amphetamine; MA, methamphetamine; ZC, the carboxylate-form major metabolite of zolpidem; AF, 7-aminoflunitrazepam; PB, phenobarbital; HT, α-hydroxytriazolam; HB, α-hydroxybrotizolam; FN, flunitrazepam; ZP, zolpidem; TZ, triazolam; BZ, brotizolam; PM, promethazine; and CP, chlorpromazine.
Forensic Science International  , 40-45DOI: ( /j.forsciint )
Copyright © 2013 Elsevier Ireland Ltd Terms and Conditions

4. Fig. 3
Recoveries of the 13 drugs and metabolites by the modified QuEChERS method and liquid–liquid extraction (LLE). Dark-gray, the modified QuEChERS method; white, LLE with chloroform–isopropanol (3:1, v/v), at pH 4.5; and light-gray, LLE with chloroform–isopropanol (3:1, v/v) at pH 9. AP, amphetamine; MA, methamphetamine; ZC, the carboxylate-form major metabolite of zolpidem; AF, 7-aminoflunitrazepam; PB, phenobarbital; HT, α-hydroxytriazolam; HB, α-hydroxy-brotizolam; FN, flunitrazepam; ZP, zolpidem; TZ, triazolam; BZ, brotizolam; PM, promethazine; CP, chlorpromazine.
Forensic Science International  , 40-45DOI: ( /j.forsciint )
Copyright © 2013 Elsevier Ireland Ltd Terms and Conditions

5. Fig. 4
GC–MS chromatograms obtained from a forensic blood specimen, processed by the modified QuEChERS method.
Forensic Science International  , 40-45DOI: ( /j.forsciint )
Copyright © 2013 Elsevier Ireland Ltd Terms and Conditions

6. Fig. 5
LC–MS chromatograms obtained from a forensic blood specimen, processed by the modified QuEChERS method. AP, amphetamine; MA, methamphetamine.
Forensic Science International  , 40-45DOI: ( /j.forsciint )
Copyright © 2013 Elsevier Ireland Ltd Terms and Conditions