Cystatin C Assay Information

Technical Specifications

Method PETIA
Measurement range 0.4 – 7.8 mg/L
Sample Matrix Blood plasma or serum
Antibody type Avian
Calibrator type Multi level or autodilution
Standardization ERM-DA471/IFCC
Uncertainty 0.21 mg/L
Security zone* > 10 mg/L
Calibration curve stability* 4 weeks
On board stability* 9 weeks stored at 2-8°C

*Instrument specific. For further information and instrument specific performance specifications, please see individual application notes.


Cystatin C Products Available

The following items are available from Gentian:

(N.B. Not all products are available on all chemical analyzer platforms, please contact your local distributor to see what products are available for your platform)

Product code Product description Size
1101 Cystatin C  Assay kit 58 mL + 10 mL
1019 Cystatin C   Control Kit 2 x 1 mL
1026 Cystatin C   Control Kit 2 x 5 mL
1029 Cystatin C   Single Use Control Low 100 x 150µL
1030 Cystatin C   Single Use Control High 100 x 150µL
1051 Cystatin C   Calibrator Kit 6 x 1 mL
1012 Cystatin C   Calibrator 1 mL


Find your local distributor on the ordering page or by emailing


Tracability and Standardization

The Gentian cystatin C assay is calibrated against the world standard reference material ERM-DA471/IFCC using a published protein transfer protocol.

In 2010 the International Federation of Clinical Chemistry (IFCC) formed a working group to produce an international reference material (ERM- DA471/IFCC). The Gentian cystatin C assay was one of the methods selected to establish this world standard.  You can be at ease when using this assay knowing that it is has been repeatedly proven to be aligned with the world standards for cystatin C measurment.


Relevant News

Gentian is exhibiting at AACC in San Diego 30th July – 3rd August. Visit us at booth #531 or contact to schedule a meeting.

Read more

Gentian were inspected by FDA during 17-20th August 2015. The inspection was a success and was completed without any 483’s (non-conformances).

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One of our own R&D scientists recently took part in a collaboration lead by Prof. Anders Grubb (University Hospital, Lund, Sweden) researching a simple, internationally applicable equation for calculating eGFR from any standardised cystatin C results. The paper, titled ‘Study cohort used to produce an international cystatin C-based estimating equation for GFR in adults and children’ is available online now.