Animal feeding stuffs. Determination of OC-pesticides and PCBs by GC/MS

Animal feeding stuffs. Determination of OC-pesticides and PCBs by GC/MS

£186.00
£186.00
£93.00
Sold out

BS EN 15741:2009 Animal feeding stuffs. Determination of OC-pesticides and PCBs by GC/MS

BS EN 15741 specifies a gas chromatographic/mass spectrometric method for the determination of organochlorine pesticides (OC’s) and polychlorinated biphenyls (PCBs) in animal feeding stuffs and oil.

The method is applicable to animal feeding stuffs with a water content up to about 20 wt% and oil/fatty samples containing residues of one or more of the following OC’s and PCBs and some of their isomers and degradation products:

  • Aldrin
  • Dieldrin
  • Chlordane (= sum of Chlordane isomers and Oxychlordane)
  • DDT (= sum of isomers op'-DDT, pp'-DDT, pp'-TDE (pp'-DDD), and pp'-DDE)
  • Endosulfan (sum of α-/β-isomers and Endosulfan-sulphate)
  • Endrin
  • Heptachlor (= sum of Heptachlor and β-Heptachlorepoxide)
  • Hexachlorobenzene (HCB)
  • Hexachlorocyclohexane isomers α-HCH (α-BHC), β-HCH (β-BHC), γ-HCH (γ-BHC or lindane)
  • PCB 28, 52, 101, 138, 153 and 180 (“Indicator PCBs”) and PCB 198, 209.

The method is not yet applicable to Chlorocamphene (Toxaphene), a complex mixture of polychlorinated camphenes. Chlorocamphene has a very distinctive chromatographic profile and is easily recognisable by GC/ECD. Positive identification of the toxaphene isomers can be performed by negative chemical ionisation mass spectrometry (NCI-MS), electron impact tandem mass spectrometry (EI-MSxMS) or electron impact high resolution mass spectrometry (EI-HRMS) [1], which is not within the scope of this method.

The limit of quantification for the mentioned organochlorine pesticides and PCBs is 5 ng/g in general. However, 10 ng/g applies for Heptachlor Aldrin, Endrin, Dieldrin, and Endosulfan (α-, β- and sulphate). Individual laboratories are responsible to ensure that the equipment they used will achieve these limits of quantifications

Contents of BS EN 15741:

  • Foreword
  • Scope
  • Normative references
  • Terms and definitions
  • Principle
  • Reagents and materials
  • Apparatus
  • Sampling
  • Preparation of test sample
  • Procedure
  • Calculation and expression of results
  • Precision
  • Test report
  • Important considerations
  • Results of interlaboratory tests
  • Description of PTV injection system (in case this is available).
  • Bibliography