A grid membrane is actually a sterilized microbial limit test disc membrane with a grid pattern. By utilizing different pore sizes, it enriches specified bacteria for cultivation, enabling the counting and detection of these bacteria.
The housing of the Blueco filtration and sterilization filters is made of medical-grade polypropylene, produced via one-time injection molding. It features high-pressure resistance and ensures no product leakage. Each filter comes individually packaged and is gamma-irradiated for sterility; it is free of DNA/RNA enzymes, pyrogens, and endotoxins. These filters are primarily used for sample filtration in HPLC and GC analyses, removal of protein precipitates from cell reagents, dissolution assays, food analysis, biofuel analysis, environmental monitoring, and other applications. Filter materials include CA, Ny, PVDF, PES, PTFE, and MCE, with diameters available in 13mm, 25mm, and 30mm, and pore sizes of 0.22μm and 0.45μm.
The Blueco filtration sample vials are made from high-quality borosilicate glass and meet ASTM Type I Class A and USP Type I standards. The design and manufacturing of the vial caps and septa ensure excellent sealing performance and seamless compatibility with instruments from manufacturers such as Agilent, Shimadzu, Waters, and Thermo Scientific. Our production facility implements comprehensive quality control throughout the entire process. We also conduct chromatographic performance tests on silicone rubber septa to guarantee the highest purity standards, eliminate impurity contamination, and prevent potential analytical errors. Commonly used specifications include chromatography injection vials, headspace vials, and storage vials ranging from 2 to 40 ml.
In membrane separation technology, microporous membranes are the most widely used type of membrane. They are simple and quick to use and are extensively applied in numerous fields, including scientific research, food testing, chemical engineering, nanotechnology, energy, and environmental protection. The unique pore structure of disc-shaped membranes creates a natural physical barrier that allows particles or microorganisms to be retained on the membrane surface, endowing them with excellent particle-retention capabilities.
Nylon needle filters are widely used in various analytical processes. Hydrophilic nylon membranes are suitable for filtering both aqueous and organic solvents, making them ideal for sample preparation in applications such as high-performance liquid chromatography and gas chromatography. They feature high flow rates, low extractables, and excellent mechanical strength.
PTFE (Polytetrafluoroethylene) Needle Filter
PTFE (polytetrafluoroethylene) needle filters are available in hydrophilic and hydrophobic versions. They can be used to filter highly chemically corrosive organic solvents, aqueous solutions, and gases, and are resistant to most strong acids and alkaline solutions.
PES (Polyethersulfone) Needle Filter
PES (polyethersulfone) needle filters are widely used in laboratory filtration applications for media, culture solutions, serum solutions, growth hormones, nutrient solutions, and other special-purpose solutions that require particular handling.
CA (Cellulose Acetate) Needle Filter
CA (cellulose acetate) needle filters are suitable for filtering aqueous solutions. Cellulose acetate membranes feature high flow rates, thermal stability, and low adsorption.
PP (Polypropylene) Needle Filter
PP (polypropylene) needle filters are naturally hydrophobic filtration media characterized by high throughput and high dirt-holding capacity, making them suitable for routine filtration of organic solvents with relatively high particle content.
MCE (Mixed Cellulose) Needle Filter
The MCE mixed-cellulose ester syringe filter is naturally hydrophilic and is used for filtering aqueous solvents, removing particulates, and performing biochemical analyses (protein retention). It is suitable for preparing HPLC samples and filtering solvents.
RC (Regenerated Cellulose) Needle Filter
RC (regenerated cellulose) is made from natural cellulose through a series of chemical and physical processes to form a film. RC films exhibit excellent hydrophilicity and strong chemical stability.
PVDF (Polyvinylidene Fluoride) Needle Filter
PVDF (polyvinylidene fluoride) membranes exhibit lower protein binding rates compared to cellulose nitrate and polytetrafluoroethylene filters. They possess excellent chemical compatibility, are compatible with a wide range of organic solvents, and offer broad applicability. Additionally, they demonstrate good resistance to oxidation and heat, making them suitable for sample preparation and solvent filtration in applications such as HPLC and GC.
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