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prEN 18258 Viešoji apklausa

Komentavimo iki data 2025-12-30

Dirvožemio gerinimo medžiagos ir auginimo terpės. Gyvsidabrio kiekio nustatymas

Soil improvers and growing media - Determination of mercury in aqua regia soil extracts with cold-vapour atomic spectrometry or cold-vapour atomic fluorescence spectrometry

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prEN 13654-1 Viešoji apklausa

Komentavimo iki data 2025-12-30

Dirvožemio gerinimo medžiagos ir auginimo terpės. Azoto kiekio nustatymas. 1 dalis. Modifikuotas Kjeldalio metodas

This European Standard specifies a method for the determination of nitrogen in soil improvers and growing media. The Kjeldahl method determines ammonium-N, nitrate-N, nitrite-N and organic N content of soil improvers and growing media. Nitrogen in N-N-linkages, N-O-linkages and some heterocyclics (especially pyridine) is only partially determined. [6], [7], [8] The method is not applicable to liming materials and preformed materials such as mineral wool slabs and foam slabs. NOTE The requirements of the standard may differ from the national legal requirements for the declaration of the products concerned.

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prEN 18253 Viešoji apklausa

Komentavimo iki data 2025-12-16

Dirvožemio gerinimo medžiagos ir auginimo terpės. Visuminio organinės anglies kiekio nustatymas sausai deginant

This document specifies a method for the determination of total organic carbon (TOC) in soil improvers and growing media containing more than 1 g carbon per kg of dry matter (0,1 %). NOTE Samples with a low dry matter content can have an influence on the achievable limit of quantification as defined in the scope (i.e. 1 g carbon per kg of dry matter).

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prEN 18256 Viešoji apklausa

Komentavimo iki data 2025-12-16

Degazuotasis substratas. Likutinio biodujų potencialo nustatymas

This document specifies a method for the determination of the residual biogas potential in digestate in an anaerobic environment.

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prEN 18255 Viešoji apklausa

Komentavimo iki data 2025-12-16

Dirvožemio gerinimo medžiagos ir auginimo terpės. Organinio azoto kiekio nustatymas

This document specifies a method for the determination of the organic nitrogen content in organic soil improvers.

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prEN 18254 Viešoji apklausa

Komentavimo iki data 2025-12-16

Dirvožemio gerinimo medžiagos ir auginimo terpės. Neorganinio arseno kiekio nustatymas

This document specifies a method for extraction, separation, and determination of inorganic arsenic (iAs) in growing media and soil improvers using anion-exchange high performance liquid chromatography (HPLC) or ion chromatography (IC) coupled to ICP-MS. This document is applicable to the fertilizing product blends where a blend is a mix of two or more fertilising products belonging to the categories of fertilizers, liming material, soil improvers, growing media, inhibitors and plant biostimulants, and where soil improvers and/or growing media are the components with the highest percentage in the blend by mass or volume, or in the case of products in liquid form by dry mass. If the soil improvers and/or growing media are not the components with the highest percentage in the blend, the document relevant to the component with the highest percentage in the blend applies. In case a blend is composed of fertilising products mixed in equal quantities, the user of the document decides which standard to apply. NOTE A soil improver consists of a single bulky (volume-building) component or a mix of bulky (volume-building) components (for example peat, wood fibres, coconut coir, compost, expanded perlite).

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prEN 13040-1 Viešoji apklausa

Komentavimo iki data 2025-12-16

Dirvožemio gerinimo medžiagos ir auginimo terpės. Mėginių paruošimas. 1 dalis. Mėginių paruošimas cheminiams ir fizikiniams tyrimams, sausųjų medžiagų kiekio, drėgnio ir laboratorijoje tankinamos medžiagos piltinio tankio nustatymas

This document specifies a routine method for preparing a sample of organic soil improver, inorganic soil improver, growing medium, compost or digestate prior to chemical analysis and physical testing. The procedures described herein apply only to those samples that are supplied to a laboratory in the form in which they will be used for their intended purpose and to samples with a manufacturer’s guidance for reconstitution. NOTE 1 The determination of the laboratory bulk density is given in Annex A. NOTE 2 The results of an interlaboratory trial to determine moisture content are given in Annex B. NOTE 3 The results of an interlaboratory trial to determine laboratory bulk density are given in Annex B.

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prEN 13039 Viešoji apklausa

Komentavimo iki data 2025-12-09

Dirvožemio gerinimo medžiagos ir auginimo terpės. Organinių medžiagų ir pelenų kiekio nustatymas

This document specifies a routine method for determining the organic matter and the ash content of soil improvers and growing media. NOTE The loss on ignition (LOI) is often used as an estimate for the content of organic matter in the sample. Inorganic substances or decomposition products (e.g. H2O, CO2, SO2, O2) are released or absorbed and some inorganic substances are volatile under the reaction conditions. Thus, a conversion to the organic carbon content is not possible.

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prEN 13037 Viešoji apklausa

Komentavimo iki data 2025-12-09

Dirvožemio gerinimo medžiagos ir auginimo terpės. pH nustatymas

This document specifies an instrumental method for the routine determination of pH in a suspension of soil improvers or growing media.

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prEN 16319 Viešoji apklausa

Komentavimo iki data 2025-12-02

Neorganinės trąšos ir kalkinimo medžiagos. Tam tikrų elementų nustatymas. Kadmio, chromo, vario, švino, nikelio ir cinko nustatymas induktyviai susietos plazmos atominės emisijos spektrometrijos metodu (ICP‐AES), ištirpinus karališkajame vandenyje

This document specifies a method for the determination of the content of cadmium, chromium, copper, lead, nickel and zinc in fertilizers and liming materials using inductively coupled plasma-atomic emission spectrometry (ICP-AES) after aqua regia dissolution. Limits of quantification are dependent on the sample matrix as well as on the instrument, but can roughly be expected to be 0,3 mg/kg for Cd and 1 mg/kg for Cr, Cu, Ni, Pb and Zn. This document is applicable to the fertilizing products blends where a blend is a mix of at least two of the following components: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants and where the following category: inorganic fertilizers and liming materials is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass. If inorganic fertilizers and liming materials is not the highest % in the blend, the European Standard for the highest % of the blend applies. In case a fertilizing product blend is composed of components in equal quantity, the user decides which standard to apply. NOTE 1 The term fertilizer is used throughout this document and needs to be taken to include liming materials unless otherwise indicated. NOTE 2 Dissolution by aqua regia is equivalent to digestion and extract and digest are equivalent terms in this sense for the purposes of this standard.

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