Environment Testing >> Laboratory Services >> Pesticides Residue Testing

Pesticide Residue Testing

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Eurofins New Zealand pesticide division is IANZ Accredited and has the largest testing scope available with over 550 compounds

Pesticides are chemicals used in agriculture to protect crops against insects, fungi, weeds and other pests. In addition to their use in agriculture, pesticides are also used to protect public health in controlling the vectors of tropical diseases, such as mosquitoes.

But pesticides are also potentially toxic to humans. Pesticide residue refers to the pesticides that may remain on or in food after pesticide formulations are applied to food crops. The levels of these residues in foods are often stipulated by regulatory bodies in many countries.

New Zealand Ministry for Primary Industries (MPI), Codex, and other Regulatory Body’s Maximum Residue Limits (MRLs) are based on Good Agricultural Practice data and foods derived from commodities that comply with the respective Codex, or other Regulatory Body, MRLs are intended to be toxicologically acceptable.

  • Leafy Vegetables
  • Root Vegetables
  • General Foods: Sauces, Nuts, Eggs, Processed Foods
  • Drinking Water
  • Stone Fruits
  • Berries
  • Small Fruits
  • Citrus Fruits
  • Dried or Processed Fruits
  • Non-alcoholic Beverages and Juices
  • Oil Seeds
  • Cereals
  • Dairy Products: Milk Powders, Cheese, Infant Formula

 

The analytical testing of food products is defined by international convention, published in a document called the Codex Alimentarius. This is published by the Food and Agriculture Organisation of the United Nations World Health Organisation. This 183 page document has been summarised in the table below which represents the food matrices that Eurofins is able to test:

Codex Commodity Group

Common Properties

Commodity Class

Representative Species

I.

High water and chlorophyll content

Leafy vegetables

Brassica leafy vegetables

Legume vegetables

Spinach, lettuce, broccoli, cabbage, kale, parsley, green beans

II.

High water and low or no chlorophyll content

Pome fruits

Stone fruits

Berries

Small fruits

Fruiting vegetables

Root vegetables

Apple, pear

Peach, cherry

Strawberry

Grape

Tomato, bell pepper, melon

Mushroom, potato, carrot

III.

High acid content

Citrus fruits

Lemon, orange, kiwifruit

IV.

High sugar content

Dried or processed fruit

Raisins, dates, fruit jams, fruit juices

V.

High oil or fat

Oil seeds

Avocado, sunflower seeds, olives, walnut, pecan nut, pistachios

VI.

Dry materials

Cereals

Cereal products

Wheat flour, rice, maize, grains, wheat flour, wheat bran

Products of Animal Origin

Dairy origin

Milk

Processed Milk

Whole milk, skimmed milk, WMP, SMP, butter milk, butter, cheese, infant formula, WPC

Acid Herbicides

In recent years the older style of volatile and non-polar residue compounds have been replaced by more polar, thermo-labile, less volatile, easily degradable compounds.  Acid  herbicides fall  into  this  class  and are  found  in wide  use around the world because of their  relative cheapness  and  effectiveness  as  broad-leaf  weed  killers  in  grain  crops. 

Acid herbicides readily dissolve in water due to their polarity having half-lives  in soil  and  water  ranging  from  weeks  to  months  depending  on  the  prevailing environmental conditions such as pH and light intensity.

Testing for these compounds is a requirement under many resource consents, for drinking water compliance and for compliance with Ministry for Primary Industries export requirements. Eurofins can test your samples in these matrices as well as soil and sludge.

Acid Herbicides

New Zealand Drinking Water Standard (NZDWS)

MPI Exports

Test Code

Detection Limit

NZDWS Limit

Test Code

RLP Limit

2,4-D

W-AH001

<0.0005 mg/L

0.04 mg/L

LS-AH001

0.04 mg/L

2,4-DB

W-AH004

<0.005 mg/L

0.1 mg/L

LS-AH002

0.1 mg/L

2, 4, 5-T

W-AH007

<0.0005 mg/L

0.01 mg/L

LS-AH003

0.01 mg/L

Acifluorfen

W-AH010

<0.0005 mg/L

No Limit Listed

Not required to be tested

Bentazone

W-AH013

<0.0005 mg/L

No Limit Listed

Not required to be tested

Bromoxynil

W-AH016

<0.0005 mg/L

No Limit Listed

Not required to be tested

Dicamba

W-AH019

<0.005 mg/L

No Limit Listed

Not required to be tested

Dichlorprop

W-AH022

<0.0005 mg/L

0.1 mg/L

LS-AH004

0.1 mg/L

Dinoseb

W-AH025

<0.0005 mg/L

No Limit Listed

Not required to be tested

Fenoprop

W-AH028

<0.0005 mg/L

0.01 mg/L

LS-AH005

0.01 mg/L

MCPA

W-AH031

<0.0005 mg/L

0.002 mg/L

LS-AH006

0.002 mg/L

MCPB

W-AH034

<0.005 mg/L

No Limit Listed

Not required to be tested

Mecoprop

W-AH037

<0.0005 mg/L

0.01 mg/L

LS-AH007

0.01 mg/L

Pentachlorophenol

W-AH040

<0.0005 mg/L

0.009 mg/L

LS-AH008

0.009 mg/L

Picloram

W-AH043

<0.005 mg/L

0.02 mg/L

LS-AH009

0.02 mg/L

Triclopyr

W-AH046

<0.0005 mg/L

0.1 mg/L

LS-AH010

0.1 mg/L

Please contact us for more information