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Test Code QBSAG Hepatitis B Surface Antigen (Quantitative)

Specimen Requirements

Specimen Type: Serum
Container/Tube: Gold Top (SSTII) / Red Top
Volume: 5.0mL / 6.0mL blood
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours

Sample Stability

** Preferred temperatures for storage prior to and during shipping to NUH **


Specimen type Serum
Ambient 7 days
Refrigerate 14 days
Frozen 28 days


Reference Interval

< 0.05 IU/mL: considered Non-reactive by the criteria of ALINITY HBsAg

≥ 0.05 IU/mL: considered Reactive by the criteria of ALINITY HBsAg

Days and Times Performed

Tuesday, TAT 2-8 days


Chemiluminescence Immunoassay

Service Code



last updated 26/02/2022

Unacceptable Condition

Haemolysis Gross reject
Icterus NA
Lipaemic NA
Others NA


Testing Laboratory

National University Hospital

Clinical Chemistry, 67724346

Useful For

Quantification of serum Hepatitis B surface antigen helps the management of patients with Chronic Hepatitis B infection.