FACILITY

ANALYTICAL CHEMISTRY UNIT

Crop, soil and water analysis - the Analytical Chemistry Unit (ACU) provides a specialist agricultural analysis service; specialising in the elemental analysis of crop, soil and environmental waters, for researchers at Rothamsted Research, collaborators and external clients.

OUR SERVICES

Specialising in the preparation and analysis of soil, crop and environmental samples our laboratories offer a wide range of services. For the preparation of dry sample materials, our facilities include sample weighing, acid digestion and extraction procedures. A suite of specialist laboratories equipped with the most advanced instrumentation available; provide high level performance in terms of speed, accuracy, precision, and reliability.

All procedures are primarily aimed at researchers or clients looking for a high-quality service, where precision and accuracy is essential. All samples are weighed not scooped and are performed by a team of highly skilled, experienced analysts.

All procedures adhere to strict Quality Assurance (QA) protocols; the facility follows the Joint Code of Practice (JCoPR) and participates in the WEPAL International Soil Exchange (ISE) and International Plant Exchange (IPE) programmes.

Sample preparation (drying and milling) is carried out in a separate sample preparation facility, but please contact us if this is also required.

If you don’t find what you are looking for in the list below, or your sample material is not listed, please contact us to discuss your specific requirements and for information on service charges. A full quotation for your work is available on request.

About the facility

Extraction and digestion services

Procedure

Determination

Sample

Nitric/perchloric digestion

Total cations: major + trace elements

Crop (milled)

Aqua regia digestion

Total cations: major + trace elements

Soil (milled)

Microwave digestion

Boron, ICP-MS analysis

Crop (milled)

Ammonium nitrate extraction

Exchangeable cations: available K Ca Mg Na

Soil (2mm)

Sodium bicarbonate extraction

Available P (Olsen P)

Soil (2mm)

Mehlich III extraction

Plant available: major + trace elements

Soil (2mm)

Potassium chloride extraction

Available nitrate and ammonium

Soil (fresh)

Cold water extraction

Nitrate and chloride

Crop (milled)

Sample Analysis Services

Instrumental Procedure

Determination

Sample

ICP-OES

Major + trace elements: (>50ppb in solution) Al B Ca Cd Co Cr Cu Fe K Mg Mn Mo Na Ni P Pb S Ti Zn

Water + crop/soil extracts + digests

ICP-MS

Trace elements: (<50ppb in solution)

As Cd Co Cr Cu Mn Mo Ni Pb Se Ti Zn

Water + crop/soil extracts + digests

Skalar San++ anion colourimetric continuous flow analysis

Available NO3-N NH4-N NO2-N PO4-P Cl

+ Total soluble nitrogen (UV oxidation)

Water + soil/crop/FYM extracts + digests

Leco Dumas combustion analysis

Total nitrogen and carbon

Crop/soil (milled)

Skalar Primacs acid addition inorganic carbon analysis

Inorganic carbon

Soil (milled)

Total organic carbon UV oxidation

TOC (as NPOC)

Water + soil extracts

pH and EC

pH in water, pH + EC

Soil (2mm)

Dry matter (oven)

Dry matter weights

Soil

Loss on ignition (muffle furnace)

Loss on ignition

Soil

CONTACT THE ANALYTICAL CHEMISTRY UNIT


Analytical Chemistry Unit (Harpenden Laboratory)   
Computational and Analytical Sciences Department
Rothamsted Research
Harpenden
Herts
AL5 2JQ

Tel: +44 (0) 1582 938648
Email: analytical.chemistry.h@rothamsted.ac.uk