Proficiency testing programs

PTS 24 : Mineral fertilizing materials

Details of the program

PTS created in 2004

ISO/IEC 17043 accredited by COFRAC

90 registered laboratories from 35 countries

Schedule

Sending date	Registration deadline	Code	Matrix	Weight
2025/10/15	2025/09/30	0124	Liquid fertilizer	500 mL
15/10/2025 00:00:00
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2025/11/14	2025/10/30	3724	Basic mineral soil improver	500 g
14/11/2025 00:00:00
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2025/12/12	2025/11/27	3224	Ashes	500 g
12/12/2025 00:00:00
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2026/01/15	2025/12/31	1924	NPK + SO3	500 g
15/01/2026 00:00:00
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2026/02/13	2026/01/29	2924	Natural phosphate	500 g
13/02/2026 00:00:00
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2026/03/13	2026/02/26	3024	Complex nitrogen fertilizer	500 g
13/03/2026 00:00:00
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13/03/2026 00:00:00
2026/04/15	2026/03/31	3424	Mineral fertilizer	500 g
15/04/2026 00:00:00
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15/04/2026 00:00:00
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2026/06/10	2026/05/26	0724	Kieserite	500 g
10/06/2026 00:00:00
10/06/2026 00:00:00
10/06/2026 00:00:00
10/06/2026 00:00:00
10/06/2026 00:00:00

Specificity of the circuit

The analytical criteria are given for information only and may vary depending on the composition of the raw material chosen.

Shipment information

Samples sent by express carrier

DAP Incoterm

Delivery of samples in Europe + USA at D+1

Other countries between D+2 and D+5

Samples marked with are sent frozen / refrigerated

Matrices and analytes may be changed or removed for technical or scientific reasons.
Some samples are sent frozen / refrigerated