A mass spectrometry (MS) calibration standard

Order Number Product Package size Price (€)
PQ-CS-5370 QCAL – complete protein, lyophilized 25 µg € 95,-
PQ-CS-5371 QCAL – peptide mix lyophilized, digested 25 µg € 99,-

Order Information

You can place your QCAL order here or return the completed order form. You can also contact us directly through:


Phone: +49 (0)9405 96999 10

Or Fax: +49 (0)9405 96999 28

Our prices are net prices, i.e. they do not contain value added taxes or customs fees. These taxes have to be paid by the customer.
The ordered products are usually shipped 1-2 business days after receiving the order.
The costs of the delivery have to be paid by the customer. Please select your preferred shipping option
Destination Option Delivery time Shipping costs (€)
Germany DHL standard 2-3 days 5,-
Germany DHL express 1 day 10,-
EU DHL standard 4-12 days 10,-
International FEDEX international priority 3-7 days 25-55,- depends on destination

If you have questions about shipping please contact us.

Product Information

QCAL calibration standards for mass spectrometry
  • Assess and optimize instrument resolution
  • Test the linearity of signal detection
  • Assess peptide modification such as deamidation, methionine oxidation and modification of lysine residues
  • Compare proteomics data within and between laboratories
  • Evaluate peptide separation by reversed-phase chromatography

QCAL is a MS calibration standard that is built from 22 peptides, ranging from ~ 410- 3100 Da and is designed to provide standards for peptide separation by reversed-phase chromatography, to facilitate the assessment and optimisation of instrument resolution and to evaluate the linearity of signal detection in different MS instruments, including MALDI-ToF, ESI MS and FTICR. QCAL also includes peptides containing amino acid residues subject to modification (oxidation of methionine, deamidation of gln/asn) and modification of lysine residues by guanidination, allowing the routine monitoring of these processes. For more information, see the original publication.


25 µg or 479 pmol of QCAL (digested or undigested) equal 50 – 500 injections (1 – 10 pmol/injection).


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