Quaternary Ammonium Compounds

SAL have developed an extensively validated method for the two key quaternary ammonium compounds; didecyldimethylammonium chloride (DDAC) and benzalkonium chloride (BAC) in a wide range of fruits and vegetable.

Detection method: LC/MS/MS
Reporting limit : 0.01mg/kg

Didecyldimethylammonium Chloride (DDAC) and Benzalkonium Chloride (BAC)

In 2012, residue surveilllance monitoring in Europe identified unexpected residues of didecyldimethylammonium chloride (DDAC) and benzalkonium chloride (BAC) above the statutory Maximum Residue Levels (MRLs) in fresh produce. It is believed that the primary source of these residues was disinfectant use ??? mostly through treatment of equipment surfaces, as well as disinfection of water used for food washing and irrigation.

DDAC and BAC are quaternary ammonium compounds (QACs) used for disinfectant, biocide and plant protection purposes. Due to their classification as plant protection active substances, statutory MRLs apply to food and feed products under the terms of EC Regulation 396/2005. In the case of both DDAC and BAC all foods and feeds covered by Regulation 396/2005 are subject to a statutory MRL of 0.01 mg/kg. Based on the limited data available, the Member States agreed on guidelines and a temporary MRL of 0.5 ppm.

The European Food Safety Authority (EFSA) have proposed (September 2013) to revise the existing temporary guideline MRL for BAC and DDAC from 0.5 mg/kg to 0.1 mg/kg and set this as the statutory MRL.

SAL has developed extensive state-of-the-art accredited analytical laboratories dedicated to the most modern and specialist food testing services.

Our food laboratories are located in three of our five UK sites: Cambridge, Moy and Manchester.

Benefits of our analytical testing service include:

  • High quality results
  • Online LIMS
  • Rapid turnaround times
  • Dedicated project managers
  • Bespoke complimentary courier service
  • Reports supplied in a PDF format

To discuss our Quaternary Ammonium Compounds testing services in more detail, please call us on 01954 782791 or contact us online.