A plastic sample bags are an essential part of a breath sampling device. The sample container chosen depends on the application, but it must be impermeable and robust for storage.
Tedlar bags are the most often used and are an excellent choice for most breath samples. However, due to the diffusion of contaminants from the bag walls, they can bleed background substances.
In a wide range of applications, reliable analytical methodologies are needed to assess the quality of biogas or biomethane. This requires sampling and subsequent transfer to the laboratory.
Sampling bags or on sorbent tubes are two common methods for collecting biogas samples. However, short-term storage stability is a concern when using either of these techniques, and when sampling onto an adsorbent, the flow rate needs to be stable during the sample transfer.
To overcome these limitations, we designed a novel gas sampling system that uses industry-standard polypropylene fittings to combine the valve and septum into one convenient fitting. The device uses a syringe port with a replaceable septum to allow for easy connection and handling.
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Sampling tubes are sealed glass tubes that generally contain two sections of adsorbent material to monitor levels of organic vapors and gases. They are commonly used for air and gas sampling.
When collecting gas samples, flow rates should be low. This ensures that the sampling tube is not clogged with gas during the sample.
Typical flow rates for VOC samples are 50 ml/min (air) or 100 ml/min. Higher flow rates may be necessary to collect biogas and biomethane.
A study compared the effects of Grimm and Tygon tubing on particle charging efficiency with an aerosol sampler. The study reported that new Grimm tubing tended to overestimate the concentration of particles with a high molecular mass, whereas older tubes caused a reduction in particle charging efficiency.
Gas sampling bags are an easy, economical way to collect and transfer air samples from a collection point to a laboratory or test instrument. Their non-permeable, opaque, and chemically inert properties ensure the integrity of your sample and avoid contamination.
Tedlar bags are the most common type of gas sampling bag, and they are excellent for part per billion (ppb) to part per million (ppm) VOC and permanent gas analysis. However, they may bleed background chemicals such as dimethylacetamide and phenol.
ALTEF gas sampling bags offer an alternative to Tedlar that produces very low VOC and sulfur background levels. These bags are made from a durable polyvinylidene fluoride (PVDF) film and contain no additives, fillers, or pigments.
The gas sample bags are available in a range of sizes and feature a hose connection to fit 3/16" ID tubing with a replaceable septum. An on/off valve function with a cap stop limits the amount of gas collected and prevents leaks.
Tedlar gas sampling bags are made of Polyvinyl Fluoride (PVF) film, which is a patented product by Du Pont. The PFV film is a tough, durable, and chemically inert film that is applicable to a wide range of applications.
These bags are commonly used for hot stack or industrial chimney sample collection. They have high resistance to heat and can withstand temperatures between 150 and 170 degrees C.
Generally, these bags have a thickness of 2 mil and are available in various capacity options. They can be customized to fit any size or application requirements.
Our bags include a combo valve with a hose connection and a syringe port with a replaceable septum. The valve has a screw cap and a 3/16" OD stem for use with most 1/4" OD plastic and fluoropolymer tubing.
These bags are an excellent alternative to Tedlaru00ae film for most VOC and sulfur compound samples. They are stable for up to 24 hours and can collect aliphatic and aromatic organic compounds, chlorinated solvents, and alcohols.
Hunan Vegas Biotech, a 10-year-old producer of laboratory equipment, is now a well-known company. Our factory for 3m sample bag covers an area of 16,000 m2 and has a 100,000-level production workshop to purify.
There are 27 people on the R&D team at the factory. It also houses over 180 mold sets. This allows for a rich knowledge of customizing services to meet the needs of different customers.
Our main clients are universities, hospitals, biomedical companies, medical testing institutions, and hospitals. Our products such as whirl pak sample bags are sold in 80 countries, which include Europe, North America, Asia, Latin America, Australia, and the Middle East.
All of our lab equipment is either plastic or vitrified. They include storage, handling of liquids, sterile sampling bags, the Microbiology and Cell Culture Series, Sample Processing Series, and biological reagents.
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