Our Work

Proficiency Testing Programmes

Proficiency testing (PT) is a valuable tool for the evaluation of the performance of testing laboratories. In general, PT disseminates the teacher-policeman dual role of assisting participating laboratories in demonstrating technical competence and identifying problems and opportunities for self-improvement. In fact, participation in PT programmes has been taken as one of the mandatory requirements for laboratory accreditation. Since 1987, Government Laboratory (GL) has organized PT programmes under the scope of food, environment, commodity products, pharmaceuticals and Chinese medicine testing.

As an initiative to honour our commitments as the reference laboratory for chemical measurements in Hong Kong and in collaboration with the Hong Kong Council for Testing and Certification in providing support to the testing and certification industry, GL will continue to organise PT programmes when needs arise.

Pharmaceutical samples

Pharmaceutical samples

GL was accredited as a proficiency testing scheme provider according to requirements of the international standards ISO/IEC 17043:2010. The PT programmes previously organized and those planned are summarized in the attached table for reference.

Accreditation Certificates

Accreditation Certificate
(Click to magnify)

Programme No. of Participants Completion Date
Food Safety Testing – Benzoic Acid in Fish Sauce
(APAC T113)
41 In progress
Food Safety Testing – Benzoic Acid in Fish Sauce
(GLHK PT 21-04)
9 In progress
Chinese Medicine Testing – Assay of Chinese Materia Medica
(GLHK PT 21-03)
11 Dec 2021
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 21-02)
9 Apr 2021
Food Safety Testing – Boric Acid in Food
(GLHK PT 21-01)
11 Apr 2021
Food Safety Testing – Inorganic Arsenic in Aquatic Product
(GLHK PT 20-03)
8 Apr 2021
Food Safety Testing – Toxic Metal/Metalloid Species in Powdered Rice
(APLAC T110)
63 Jul 2020
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 20-02)
10 May 2020
Food Safety Testing – Boric Acid in Food
(GLHK PT 20-01)
10 May 2020
Chinese Medicine Testing – Chemical Markers in Chinese Medicinal Oil
(GLHK PT 19-03)
12 Apr 2020
Chinese Medicine Testing – Assay of Chinese Materia Medica
(GLHK PT 18-04)
12 Oct 2019
Chinese Medicine Testing – Organochlorine pesticides in ginseng root
(APLAC T106)
51 Jul 2019
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 19-02)
10 Jun 2019
Food Safety Testing – Boric Acid in Food
(GLHK PT 19-01)
10 May 2019
Food Safety Testing – Inorganic Arsenic in Aquatic Product
(GLHK PT 18-03)
9 Feb 2019
Food Safety Testing – Elements in Food Supplement
(APLAC T107)
52 Sep 2018
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 18-02)
8 May 2018
Food Safety Testing – Boric Acid in Food
(GLHK PT 18-01)
9 May 2018
Forensic Science Testing – Chinese Handwriting and Signature Examination
(GLHK PT 17-04)
31 May 2018
Chinese Medicine Testing – Assay of Chinese Materia Medica
(GLHK PT 17-03)
14 Jan 2018
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 17-02)
7 Jun 2017
Food Safety Testing – Boric Acid in Food
(GLHK PT 17-01)
10 May 2017
Chinese Medicine Testing – Assay of Chinese Materia Medica
(GLHK PT 15-03)
14 Jan 2017
Food Safety Testing – Pesticides in Fruit Juice
(APLAC T102)
71 Dec 2016
Forensic Science Testing – Stamp Impressions Examination
(GLHK PT 16-03)
24 Nov 2016
Food Safety Testing – Determination of Elements (Calcium and Cadmium) in Drinking Water
(APLAC T095)
99 Jul 2016
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 16-02)
9 Jun 2016
Food Safety Testing – Boric Acid in Food
(GLHK PT 16-01)
10 May 2016
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 15-02)
10 Aug 2015
Chinese Medicine Testing – Assay of Chinese Materia Medica
(GLHK PT 14-03)
14 Jun 2015
Food Safety Testing – Boric Acid in Food
(GLHK PT 15-01)
8 Mar 2015
Forensic Science Testing – Chinese Handwriting and Signature Examination
(GLHK PT 14-01)
23 Aug 2014
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 14-02)
6 Jul 2014
Food Safety Testing – Measurement of Radioactive Contaminants in Food
(GLHK PT 13-04)
19 Jun 2014
Food Safety Testing – Boric Acid in Food
(GLHK PT 13-09)
8 Feb 2014
Food Safety Testing – Essential and toxic elements in seafood
(APMP PT 11-01)
14 Sep 2013
Food Safety Testing – Pesticides in tea
(APMP PT 11-02)
20 Sep 2013
Food Safety Testing – Propionic Acid in Flour Confectionery
(GLHK PT 13-03)
7 Aug 2013
Food Safety Testing – Essential and trace elements in seafood
(APLAC T082)
71 Aug 2013
Food Safety Testing – Organochlorine pesticides in green tea
(APLAC T081)
65 Oct 2013
Food Safety Testing – Boric acid in Food
(GLHK PT 12-04)
8 Feb 2013
Food Safety Testing – Measurement of Radioactive Contaminants in Food
(GLHK 1201)
19 Oct 2012
Food Safety Testing – Aflatoxin B1 in peanut oil
(GLHK 1101)
14 Dec 2011
Food Safety Testing – 137Cs in Milk Powder
(GL/2011/PT-5)
5 Jul 2011
Food Safety Testing – Essential and trace elements in bovine liver
(APLAC T077)
38 Jun 2011
Environmental Testing – PAH in sediment
(APLAC T078)
69 Apr 2011
Forensic Science Testing – Ketamine in hair
(GLHK 1001)
10 Apr 2011
Food Safety Testing – Heavy metals in crustacean seafood
(GLHK 1002)
68 Oct 2010
Food Safety Testing – Organochlorine pesticides in green tea
(HKGL 0903)
8 Mar 2010
Food Safety Testing – Sudan dyes in chilli powder
(HKGL 0904)
11 Jan 2010
Food Safety Testing – Melamine in milk
(APLAC T071)
76 Nov 2009
Food Safety Testing – Melamine in fish feed
(APLAC T069)
52 Aug 2009
Environmental Testing – Polycyclic aromatic hydrocarbons in sediment
(APLAC T068)
58 May 2009
Food Safety Testing – Melamine in milk
(HKGL 0803)
14 Nov 2008
Chinese Medicine Testing – Heavy metal in herb
(APLAC T065)
109 Oct 2008
Chinese Medicine Testing – Organochlorine pesticides in ginseng root
(APLAC T059)
55 Jun 2008
Food Safety Testing – Malachite green & leuco malachite green in eel
(APLAC T058)
48 Jan 2008
Food Safety Testing – Toxic elements in seawater shrimp
(APLAC T057)
102 Jul 2007
Chinese Medicine Testing – Organochlorine pesticide residues in herbal medicine
(APLAC T049)
70 May 2006
Commodity Testing – Antimony, barium, cadmium, chromium & lead in paints
(APLAC T039)
71 Mar 2006
Chinese Medicine Testing – Cadmium & lead in herbal medicine
(APLAC T043)
38 Nov 2005
Food Safety Testing – Detection of genetically modified papaya line 55 1 5 Mar 2005
Drug Testing – Chlorpheniramine & pseudoephedrine in cough syrup
(APLAC T038)
32 May 2004
Toy Safety Testing – Fabric flammability test
(APLAC T016)
52 Jun 2000
Commodity Testing – Barium, cadmium, chromium & lead in paint
(APLAC T013)
47 Mar 1999
Commodity Testing – Azo dyes in leather product 14 Oct 1997
Food Safety Testing – Benzoic acid in oyster sauce
(APLAC T004)
134 Jun 1997
Environment Testing – Point counting method for asbestos containing materials 5 Jan 1996
Commodity Testing – Gold assay 25 Mar 1995
Environmental Testing – Metals in water 10 Dec 1993
Commodity Testing – Barium, cadmium, chromium & lead in paint 24 Jul 1990
Commodity Testing – Total lead in paint 14 Mar 1987