P2127-RT

Dithiocarbamates and dithianon

The proficiency test evaluates the performances of laboratories with respect to their ability to quantify dithiocarbamates as CS2 resp. dithianon. 

The test materials are prepared of organic pears and spinach. The raw material is free from incurred residues (< 0.01 mg/kg) of dithiocarbamates and dithianon (pear only). The pears resp. spinach are homogenised and spiked thereafter. Liquid nitrogen is used throughout the whole process of preparation, spiking and bottling of the test material to keep the material in deep-frozen condition. The test material consists of a powdery ice. Therefore, sub-samples can be taken without thawing the test samples.
The sophisticated process of test material preparation at very low temperatures avoids a degradation of temperature sensitive parameters like thiram and thus the loss of CS2.

The quantification of dithianon is offered as an additional module in this ring test. A test material of pears is prepared as described above related to the dithiocarbamates. 

Reporting limits of 0.01 mg/kg are required related to dithiocarbamates as well as related to dithianon.

Parameters

Test material pear

dithiocarbamates, expressed as CS2

Test material pear

dithianon

Test material lettuce

dithiocarbamates, expressed as CS2

Expected time schedule

Please register before:
01 July 2021
Dispatch of samples:
19 October 2021
Deadline for reporting results:
29 October 2021

Costs of P2127-RT

Ring test and material Amount Price per unit
Dithiocarbamates and dithianon 550 €
Basic price
Organisation, preparation of the homogenates, shipment, evaluation.
included
Test material pear
Pear homogenate, spiked with dithiocarbamates.
80 g 150 €
Test material pear
Pear homogenate, spiked with dithianon.
80 g 150 €
Test material lettuce
Lettuce homogenate, spiked with dithiocarbamates.
80 g 150 €
Blank material pears
Pear homogenate, unspiked.
40 g 70 €
Blank material
Spinach homogenate, unspiked.
40 g 70 €

Note: PROOF-ACS reserves the right to cancel tests in case of less than ten participants.