MaxSignal® MQCA ELISA Test Kit

Catalog# Product Name Quantity US List Price
1140-02 MaxSignal® MQCA ELISA Test Kit 1 x 96 wells Inquire

These kits are available for purchase by email, fax or phone only. Please email your order to, fax it to 1-512-707-8122 or call 512-707-8993.



  • Low-cost, rapid sample preparation protocol offering high recovery rates
  • High sensitivity
  • Rapid assay protocol - Less than 1 hour to process 42 samples in duplicate
  • High reproducibility



Rapid Screening for Olaquindox


The MaxSignal® MQCA ELISA Test Kit is a competitive colorimetric ELISA assay for the quantitative analysis of MQCA. The plate wells are coated with anti-MQCA antibody. During analysis, sample is added along with the MQCA-horseradish peroxidase (MQCA-HRP) conjugate. If MQCA residue is present in the sample, it will compete for the MQCA antibody, thereby preventing the MQCA-HRP from binding to the antibody attached to the well. The resulting color intensity, after addition of the HRP substrate (TMB), has an inverse relationship with the concentration of MQCA residue in the sample.

MQCA (3-methyl-quinoxaline-2-carboxylic acid) is a metabolite of N-(2-hydroxyethyl)-3-methyl-2-quinoxaline-carboxamide-1,4-dioxide (Olaquindox). Olaquindox is a broad spectrum antibiotic that is used in animal feed for growth promotion, to improve feed efficiency and to increase the rate of weight gain. In 1991, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) recommended maximum residue limits (MRLs) of 30 and 5 µg/kg in liver and muscle tissues, respectively. In 1998, the European Commission (EC) banned the use of olaquindox in food animal production, together with four other feed additives. In 2005, it was banned for use as a veterinary drug by Chinese government regulatory agencies.

These kits are manufactured to the international quality standard ISO 9001:2008. ISO CI#: SARA-2009-CA-0114-A

Kit Specs

The MaxSignal MQCA ELISA Test Kit has the capacity for 96 determinations or testing of 42 samples in duplicate (assuming 12 wells for standards). Store the kit at 2 – 8°C.