Whatman™ Filters for Water, Air and Soil Testing
Demo of Glass microfiber filters, 934-AH™ RTU, Whatman Chemical Analysis
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Syringe Filters, Anotop™, Whatman Application: Highlight 1: |
Syringe Filters, Puradisc™ Aqua 30, Whatman |
HPLC/UHPLC and Other Analytical Techniques
HPLC/UHPLC, and other analytical techniques
To protect your instruments and your sample, use the following filters:
Demo of Whatman GD/X™ syringe filter
Demo of Whatman Mini-UniPrep™
Microbiological Analysis
Microorganisms in a water sample are collected using a microfiltration membrane filter.
The membrane can be transferred onto a microbiological culture medium for further identification and/or quantification of microorganisms. The appropriate membrane filter choice will depend on the methodology being followed.
Membrane Filters, Mixed Cellulose Ester, Whatman |
Membrane Filters, MicroPlus and ME, Whatman |
Membrane Filters, Polyamide Membrane, Whatman Application: |
Membrane Filters, Nuclepore™ Black, Whatman Application: |
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VWR can provide you a complete product range of consumables, equipments and reagents for Environmental analysis. Use the search tool in our home page or contact your sales representative.
Whatman™ Filters for Air Testing
Air quality monitoring is getting more and more important because of the presence of high amount of air pollutants in the ambient air. The sources of emission can be natural or caused by industries, agriculture or transport traffic. Ultrafine particles (UFPs) have become a key area of interest in environmental monitoring and related studies as they have been shown to have potentially significant impacts on air quality and health.
Heavy metals, organics and inorganics chemicals such as ozone, volatile organic carbons, SO2, NO2, CO, benzoate, or asbestos has to be monitored too.
Whatman™ can support you with dedicated filters for particulate monitoring both manual and automated; for sampling in normal or aggressive enviroments; for radioactivity, metals or asbestos testing.
Make your choice between 13 different types of Whatman™ filters for air sample testing:
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Request Whatman filter samples for AIR
Particulate Analysis
Manual sampling in normal environments
Manual sampling in aggressive environments
Automated sampling
Glass Microfibre Filters with Binder, Grade GF 10, Whatman Application: Highlight 1: |
Sampling for radioactivity and metal analysis
Filters for the determination of metals in ambient particulate
Membrane Filters, Mixed Cellulose Ester, Whatman Application: Highlight 1: |
Chemical Analysis
Air pollution monitoring from stacks, flues and aerosols requires a filter that can whithstand chemically harsh environments and high temperatures. High-purity is also required for this application.
Filters for heavy metals analysis
Filters for other organic or inorganic chemicals
Asbestos Analysis
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VWR can provide you a complete product range of consumables, equipments and reagents for Environmental analysis. Use the search tool in our home page or contact your sales representative.
Whatman™ Filters for Soil Testing
From an environmental point of view, soil is a primary element of the ecosystem, together with water, air and living organisms, and therefore needs to be protected and preserved by possible degradation phenomena. On the other hand, the use of fertilizers for agricultural activity is a powerful means of increasing the productivity of the soils and therefore yields of crops.
Soil sample analysis requires that chemical compounds are first extracted from their matrix using pH and heat modulation and concentrated. Nitrogen, pesticides, phosporous, retained solids and clarified solutions, pH have to be determined in soil samples. Whatman™ can provide you the right product for each testing.
Request Whatman filter samples for SOIL
Kjeldal nitrogen analysis
Kjeldal nitrogen analysis
Soil nitrogen content is typically done with Kjeldal techniques, which involve the sampling of an exact amount of soil before transfer to a digestion tube. For this aplication you need to use the Whatman™ low nitrogen content weighing boats and then filter the sample with qualitative paper.
Qualitative Filter Papers, Standard Grades, Grade 4 and 4V, Whatman Application: |
Kjeldahl Weighing Boats, Whatman Application: |
Soxhlet Extraction
Prior to analysis by, for example, gas chromatography (GC), soils may be prepared using Soxhlet extraction or microwave digestion. Extraction thimbles are widely used for this technique. To remove fine particles and protect your GC instrument use specific syringe filters.
Spectrophotometry and Chromatography
Most trace element tests are based on extracting soil and measuring the concentration of trace elements in the soil-free liquid phase using for example inductively coupled plasma atomic emission spectrometry (ICP-AES). The sample then generally needs to be filtered through a qualitative filter paper or glass fiber filter to make sure it will not clog nebulizers or interfere with injection into the analysis instrument. If digested with acqua regia, the sample may be filtered through an ashless filter paper.
Demo of Whatman GD/X™ syringe filter
Demo of Whatman Mini-UniPrep™
Colorimetry for Phosphorous Analysis
Through soil phosphorus testing, the amount of phosphorus fertilizer required to achieve maximum plant growth can be determined. To determine the soil phosphorus content, the soil is extracted with a chemical solution and the phosphorus content in the extract is measured by colorimetry. Filtration of the extract through a qualitative filter paper is generally needed before analysis. If an automated method is used for determining phosphorus concentration, acid-resistant filter paper may be needed.
Quantitative Filter Papers, Ashless Grades, Grade 41, Whatman |
pH analysis
The pH of soil is vital for how well it holds minerals. Some plants have very particular pH requirements. There are many different ways of measuring soil pH. Litmus/pH paper is a quick and inexpensive method to test soil pH when a pH-meter is unavailable or when highly precise values are not necessary. When preparing your soil sample, use a weighing paper to weigh the soil before adding water. Filter papers can be used to remove unnecessary particles from the suspension.
Whatman™ filters for sample clarification and solids retention
Various test methods require that liquid components of a solution be separated from suspended solids prior to analysis. GE offers a wide choice of cellulose filter papers with different levels of flow rate, loading capacity, and chemical resistance to support these applications.
Related Items
VWR can provide you a complete product range of consumables, equipments and reagents for Environmental analysis. Use the search tool in our home page or contact your sales representative.