Forensic Science Division

[ Key Personnel | Key Instruments | Targets and Key Indicators ]
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Forensic Toxicology Sections

LC/MS Analysis
LC/MS Analysis

For effective casework management, the Forensic Toxicology Sections are split into Analytical Toxicology, Urinalysis, and Drink-Driving Units, each with its distinctive functions.

The Analytical toxicology Unit examines biological materials (mostly ante- or post-mortem specimens of human origin) such as blood, urine and liver, as well as related materials found at scenes for drugs or poisons. The findings assist the Coroners, Forensic Pathologists of the Department of Health, Clinical pathologists of the Hospital Authority and the Police Force in the investigation of criminal offences and suspicious deaths where drugs or poisons are implicated.

The Urinalysis Unit analyses urine samples submitted by methadone clinics of the Department of Health from drug addicts registered in the Methadone Maintenance Programme. It is also responsible for the analysis of opiate and non-opiate drugs of abuse in urine samples submitted by the Social Welfare Department, the Correctional Services Department, the Police Force and other drug rehabilitation centres, taken from young offenders placed under their monitoring programmes.

The Drink Driving Unit was set up in December 1995 as a result of changes to the Road Traffic Ordinance enacted at that time to make it an offence to drive with alcohol in breath, blood or urine exceeding the corresponding statutory limits. Effective from 1st October 1999, the Road Traffic Ordinance has been revised and tightened to make it an offence to drive with greater than 22 microgrammes (ug) of alcohol per 100 mL of breath, 50 milligrammes of alcohol per 100 mL of blood, or 67 milligrammes of alcohol per 100 mL of urine. Drivers found to have 22-37 ug/100 mL of breath alcohol as tested by police using approved breathalyser have the option of having their blood or urine samples analysed by the Unit for alcohol content instead of just accepting the breathalyser results.

The three units also provide expert advice to clients and courts on an as-need basis on issues of pharmacology and toxicology of drugs and alcohol.


Key Personnel

Forensic Toxicology A Section

Senior Chemist, Chemist and Forensic Analyst
(E-mail address)
Tel. No.
Dr. W C Cheng, Senior Chemist
(wccheng@govtlab.gov.hk)
2762-3827
Dr. L F Chan, Forensic Analyst
(lfchan@govtlab.gov.hk)
2762-3831
Ms. Augustina H T Hui, Forensic Analyst
(hthui@govtlab.gov.hk)
2762-3831

Dr. Vicky W M Lee, Chemist
(wmlee@govtlab.gov.hk)

2762-3821

Dr. W C Wong, Chemist
(wincwong@govtlab.gov.hk)

2762-3810

Forensic Toxicology B Section

Senior Chemist and Chemist
(E-mail address)
Tel. No.
Dr. N L Poon, Senior Chemist
(nlpoon@govtlab.gov.hk)
2762-3819
Ms. Florence S Y Chan, Chemist
(syfchan@govtlab.gov.hk)
2762-3823
Dr. W S Chan, Chemist
(wschan@govtlab.gov.hk)
2762-3820
Dr. Joyce L C Chim, Chemist
(joycechim@govtlab.gov.hk)
2762-3820
Dr. Wendy K M Fung, Chemist
(kmfung@govtlab.gov.hk)
2762-3823
Dr. W S Lee, Chemist
(wslee@govtlab.gov.hk)
2762-3822


Key Instruments

High performance liquid chromatography/mass spectrometry system
High performance
liquid chromatography/mass spectrometry system

The following instruments are used routinely by the Section:

  • High performance liquid chromatography/mass spectrometry system
  • Gas chromatography/mass
  • spectrometry system
  • Headspace gas chromatography system
  • Immunoassay system


Targets and Key Indicators

Key Performance Measures Relating to the Forensic Science Services

Targets

Targets are defined as the percentage of completed cases whose individual case-completion time does not exceed a specified number of working day(s)

Category@ Targets 2008
(Actual)
2009
(Actual)
2010
(Plan)
Analytical toxicology completed within 33 working days (%) 85 78 78 85
Drug urinalysis -        
Methadone clinics completed within 11 working days (%) 90 100 92 90
Judicial-confirmation (routine) completed within 22 working days (%)# 85 80 87 85
Judicial-confirmation (enhanced probation) completed within five working days (%)# 100 N.A. 100 100
Drink-driving completed within 11 working days (%) 90 93 88 90

@ From 2009 onwards, the targets are re-defined to be the percentage of completed cases whose individual case-completion time does not exceed a specified number of working day(s), instead of a targeted case-completion time (in working days) which is expected to be met in 80 per cent of the examined cases, in order to better reflect the work performance of the forensic services.
# From 2010 onwards, the previous target of “judicial confirmation” under “drug urinalysis” has been re-named to “judicial confirmation (routine)” for clarify. It refers to cases pertaining to the existing urinalysis service. A new target of “judicial confirmation (enhanced probation)” has been set for cases pertaining to the enhanced probation scheme which commenced in October 2009.

Key Indicators

Key indicators are the number of cases investigated

Number of Cases Investigated 2008
(Actual)
2009
(Actual)
2010
(Estimate)
Analytical toxicology 2,746 2,907 2,900
Drink-driving 123 112 120
Total 2,869 3,019 3,020

Number of Tests Investigated 2008
(Actual)
2009
(Actual)
2010
(Estimate)
Drug urinalysis -      
Methadone clinics# 15,944 13,119 14,000
Judicial-confirmation (routine)^# 26,114 30,896* 31,000
Judicial-confirmation (enhanced probation)* N.A. 134 19,000

# From 2009 onwards, the indicators of “drug urinalysis - methadone clinics and judicial confirmation (routine)” have been revised to base on the number of cases investigated for standardisation. They were previously based on the number of samples tested and the number of tests conducted, respectively.
^ From 2010 onwards, the previous indicator of “judicial-confirmation” under “drug urinalysis” has been re-named as “judicial-confirmation (routine)” for clarity.
* The judicial-confirmation category had 34,000 as the “2009 (Estimate)” in the Controlling Officer’s Report for 2009–10 Estimates, which had included a preliminary estimate of the additional requirement in supporting a pilot scheme which the Social Welfare Department will take forward to enhance probation service for convicted drug offenders. From 2010 onwards, a new indicator of “judicial confirmation (enhanced probation)” has been made to record this line of work indicator. The number of cases projected at the commencement of the scheme in October 2009 was 19,000 a year, although submission has not picked up yet. This situation will be closely monitored.

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