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Journal Articles

Isotopic Analogs as Internal Standards for Quantitative GC/MS Analysis—MolecularAbundance and Retention Time Difference as Interference Factors

WT Chang, Ph.D., J Smith, B.S., RH Liu, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. July 2002, 47(4): 1–9.
https://doi.org/10.1520/JFS15451J
Published Online: July 1, 2002
View Article titled, Isotopic Analogs as Internal Standards for Quantitative GC/MS Analysis—MolecularAbundance and Retention Time Difference as Interference Factors
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Journal Articles

13 C 4 -Secobarbital as the Internal Standard for the Quantitative Determination of Secobarbital—A Critical Evaluation

W-T Chang, Ph.D., D-L Lin, Ph.D., I-A Low, M.S., RH Liu, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. May 2000, 45(3): 659–664.
https://doi.org/10.1520/JFS14743J
Published Online: May 1, 2000
View Article titled, 13 C 4 -Secobarbital as the Internal Standard for the Quantitative Determination of Secobarbital—A Critical Evaluation
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Journal Articles

Separation of Enantiomeric Ephedrine and Pseudoephedrine—High Pressure Liquid Chromatography and Capillary Electrophoresis

RM Iwanicki, M.S., K Maier, M.S., JA Zlotnick, B.S., RH Liu, Ph.D., T-L Kuo, Ph.D., F Tagliaro, M.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. May 1999, 44(3): 470–474.
https://doi.org/10.1520/JFS14496J
Published Online: May 1, 1999
View Article titled, Separation of Enantiomeric Ephedrine and Pseudoephedrine—High Pressure Liquid Chromatography and Capillary Electrophoresis
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eBook Chapter

Study on the Limited Hardenability Steel

Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
https://doi.org/10.1520/STP12137S
ISBN-10: 0-8031-2421-X
ISBN: 978-0-8031-2421-9
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Journal Articles

Selecting an Appropriate Isotopic Internal Standard for Gas Chromatography/Mass Spectrometry Analysis of Drugs of Abuse—Pentobarbital Example

RH Liu, Ph.D., G Foster, B.S., EJ Cone, Ph.D., SD Kumar, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. November 1995, 40(6): 983–989.
https://doi.org/10.1520/JFS13868J
Published Online: November 1, 1995
View Article titled, Selecting an Appropriate Isotopic Internal Standard for Gas Chromatography/Mass Spectrometry Analysis of Drugs of Abuse—Pentobarbital Example
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Journal Articles

Improved Gas Chromatography/Mass Spectrometry Analysis of Barbiturates in Urine Using Centrifuge-Based Solid-Phase Extraction, Methylation, with d 5 -Pentobarbital as Internal Standard

RH Liu, Ph.D., AM McKeehan, B.A., C Edwards, M.S.F.S., G Foster, B.A., WD Bensley, B.S., JG Langner, B.S., AS Walia, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. November 1994, 39(6): 1504–1514.
https://doi.org/10.1520/JFS13737J
Published Online: November 1, 1994
View Article titled, Improved Gas Chromatography/Mass Spectrometry Analysis of Barbiturates in Urine Using Centrifuge-Based Solid-Phase Extraction, Methylation, with d 5 -Pentobarbital as Internal Standard
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Journal Articles

Graduate Education in ‘Conventional’ Criminalistics: A Proposal and Reactions

CA Lindquist, Ph.D., RH Liu, Ph.D., K Jenkins, M.S.F.S., L Yates, J.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. March 1994, 39(2): 412–417.
https://doi.org/10.1520/JFS13612J
Published Online: March 1, 1994
View Article titled, Graduate Education in ‘Conventional’ Criminalistics: A Proposal and Reactions
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Journal Articles

Evaluation of Enzyme Immunoassay Performance Characteristics—Phencyclidine Example

MJ Fyfe, Ph.D., P Chand, Ph.D., C McCutchen, B.S., JS Long, B.S., AS Walia, Ph.D., C Edwards, B.S., RH Liu, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Technical Notes
J. Forensic Sci.. January 1993, 38(1): 156–164.
https://doi.org/10.1520/JFS13389J
Published Online: January 1, 1993
View Article titled, Evaluation of Enzyme Immunoassay Performance Characteristics—Phencyclidine Example
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Journal Articles

Simultaneous Analysis of Amphetamine, Methamphetamine, and 3,4-Methylenedioxymethamphetamine (MDMA) in Urine Samples by Solid-Phase Extraction, Derivatization, and Gas Chromatography/Mass Spectrometry

BK Gan, B.S., D Baugh, M.S.F.S., RH Liu, Ph.D., AS Walia, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. September 1991, 36(5): 1331–1341.
https://doi.org/10.1520/JFS13155J
Published Online: September 1, 1991
View Article titled, Simultaneous Analysis of Amphetamine, Methamphetamine, and 3,4-Methylenedioxymethamphetamine (MDMA) in Urine Samples by Solid-Phase Extraction, Derivatization, and Gas Chromatography/Mass Spectrometry
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Journal Articles

Microcrystalloscopic Differentiation of 3,4-Methylenedioxyamphetamine and Related Amphetamine Derivatives

BJ Simpson, M.S.F.S., TP Simpson, M.S.F.S., RH Liu, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Technical Notes
J. Forensic Sci.. May 1991, 36(3): 908–914.
https://doi.org/10.1520/JFS13102J
Published Online: May 1, 1991
View Article titled, Microcrystalloscopic Differentiation of 3,4-Methylenedioxyamphetamine and Related Amphetamine Derivatives
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Journal Articles

Simultaneous Gas Chromatography/Mass Spectrometry Assay of Methadone and 2-Ethyl-1, 5-Dimethyl-3,3-Diphenylpyrrolidine (EDDP) in Urine

LD Baugh, M.S.F.S., RH Liu, Ph.D., AS Walia, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Technical Notes
J. Forensic Sci.. March 1991, 36(2): 548–555.
https://doi.org/10.1520/JFS13057J
Published Online: March 1, 1991
View Article titled, Simultaneous Gas Chromatography/Mass Spectrometry Assay of Methadone and 2-Ethyl-1, 5-Dimethyl-3,3-Diphenylpyrrolidine (EDDP) in Urine
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Journal Articles

Evaluation of Immunoassay Methods for the Screening of Cocaine Metabolites in Urine

LD Baugh, M.S.F.S., E Ellen Allen, M.S.F.S., RH Liu, Ph.D., JG Langner, B.S., JC Fentress, SC Chadha, LF Cook, M.A., AS Walia, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. January 1991, 36(1): 79–85.
https://doi.org/10.1520/JFS13008J
Published Online: January 1, 1991
View Article titled, Evaluation of Immunoassay Methods for the Screening of Cocaine Metabolites in Urine
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Journal Articles

Isotopic Analog as the Internal Standard for Quantitative Determination: Evaluation of Mass Spectra of Commonly Abused Drugs and Their Deuterated Analogs

YS Ho, Ph.D., RH Liu, Ph.D., AW Nichols, M.S., SD Kumar, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. January 1990, 35(1): 123–132.
https://doi.org/10.1520/JFS12809J
Published Online: January 1, 1990
View Article titled, Isotopic Analog as the Internal Standard for Quantitative Determination: Evaluation of Mass Spectra of Commonly Abused Drugs and Their Deuterated Analogs
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Journal Articles

Isotopic Analogue as the Internal Standard for Quantitative Determination of Benzoylecgonine: Concerns with Isotopic Purity and Concentration Level

RH Liu, Ph.D., L Diane Baugh, B.A., E Ellen Allen, M.S.F.S., SC Salud, B.S., JG Fentress, H Chadha, AS Walia, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. July 1989, 34(4): 986–990.
https://doi.org/10.1520/JFS12725J
Published Online: July 1, 1989
View Article titled, Isotopic Analogue as the Internal Standard for Quantitative Determination of Benzoylecgonine: Concerns with Isotopic Purity and Concentration Level
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Journal Articles

Research Experience and Future Criminalists

FP Smith, Ph.D., RH Liu, Ph.D., CA Lindquist, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. July 1988, 33(4): 1074–1080.
https://doi.org/10.1520/JFS12537J
Published Online: July 1, 1988
View Article titled, Research Experience and Future Criminalists
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Journal Articles

Detection of Cocaine Metabolite in Perspiration Stain, Menstrual Bloodstain, and Hair

FP Smith, Ph.D., RH Liu, Ph.D.
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Research-Article
J. Forensic Sci.. October 1986, 31(4): 1269–1273.
https://doi.org/10.1520/JFS11905J
Published Online: October 1, 1986
View Article titled, Detection of Cocaine Metabolite in Perspiration Stain, Menstrual Bloodstain, and Hair
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Journal Articles

Letters to the Editor

KG Marriott, CR Midkiff, EJ Neiburger, D.D.S., JI Thornton, RH Liu, MG Legendre
Journal: Journal of Forensic Sciences
Publisher: ASTM International
Article Type: Letters To The Editor
J. Forensic Sci.. April 1986, 31(2): 397–402.
https://doi.org/10.1520/JFS12268J
Published Online: April 1, 1986
View Article titled, Letters to the Editor
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