Unity Health Toronto Laboratory Medicine

Test Catalogue

Complement - Total (CH50), Serum
Test Name Complement - Total (CH50), Serum
Specimen Type / Requirements Container Type = 1 Red Top or Gold Top Minimum Testing Volume = 0.5mL serum Tubes must fill to at least ½ or greater of its vacuum capacity
Specimen Handling Collection Instructions: Collect sample in red or gold top tube. Ensure to provide date and time of collection. . Laboratory Staff Instructions: Allow filled tube to clot at 22 – 37°C for 30-60 minutes. Centrifuge at room temperature and separate into a labelled aliquot tube. Store and send frozen to St Joseph’s Health Centre. Store at -80°C until testing. Rejection Criteria: Unlabeled or samples of none sufficient quantity. plasma, lipemic and grossly hemolyzed specimens are not suitable for analysis. Avoid freeze/thaw cycles. Stability: Stable at least 30 days when stored at -80°C. Thaw samples only once. Transportation: Send sample to core lab as soon as possible.
Required Documentation
Turnaround Time (TAT) 14 days	Test Utilization
Reference Value >=42 U/mL
Test Code LAB154	Methodology Turbidimetric Assay
Testing Location SJHC Biochemistry Lab	Other Information Last Updated: March 25, 2026

Complement - Total (CH50), Serum

Test Name

Complement - Total (CH50), Serum

Specimen Type / Requirements

Container Type = 1 Red Top or Gold Top

Minimum Testing Volume = 0.5mL serum

Tubes must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect sample in red or gold top tube. Ensure to provide date and time of collection. .

Laboratory Staff Instructions: Allow filled tube to clot at 22 – 37°C for 30-60 minutes. Centrifuge at room temperature and separate into a labelled aliquot tube. Store and send frozen to St Joseph’s Health Centre. Store at -80°C until testing.

Rejection Criteria: Unlabeled or samples of none sufficient quantity. plasma, lipemic and grossly hemolyzed specimens are not suitable for analysis. Avoid freeze/thaw cycles.

Stability: Stable at least 30 days when stored at -80°C. Thaw samples only once.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

14 days

Test Utilization

Reference Value

>=42 U/mL

Test Code

LAB154

Methodology

Turbidimetric Assay

Testing Location

SJHC Biochemistry Lab

Other Information

Last Updated: March 25, 2026