Within numerous applications there may be a need for a filter that can withstand high temperatures. Typically this is the case when filters are being used for air sampling with acidic gases, stacks, flues and aerosols. The most common filter material for these applications are Quartz Fiber Filters.
Quartz Fiber Filters
Quartz Fiber Filters can withstand temperatures up to 900 Degrees C, proving them to have a higher resistance than glass microfiber filters which are also commonly used in high temperature applications. These filters are heat treated to reduce trace organics, and come binder-free. Their ability to pass large volumes of air at effective rates make them a superb choice for air monitoring, sampling and PM10 analysis. Quartz filters also reflect very low metal content, and superior chemical purity.
Glass Fiber Filters
Glass Fiber filters are manufactured from 100% borosilicate glass. They can withstand temperatures between 180 - 500 Degrees C, and prove to have very efficient flow rates along with a high loading capacity. Although an option for high temperature filtration, Glass Fiber Filters are offered in various grades determined by pore size and they can be suitable for a multitude of laboratory applications. They can also be supplied with a binder, or binder free.
Grade A Glass Fiber (1.6um)
Grade A Glass Fiber Filters are seen within applications where gravimetric determination of air particulate or radioimmunoassay’s are applicable. They can be utilized in water pollution monitoring applications as well as stack sampling, and work effectively for clarification of buffer and reagent solutions as well as general laboratory filtration.
Grade B Glass Fiber (1.0um)
Grade B Glass Fiber Filters are produced mainly for use with waste water analysis and are also more commonly seen being used as a pre-filter for membranes. These filters are designed to be more wet strengthened than other grades and show increased loading capacities giving them the ability to filter much larger volumes.
Grade C Glass Fiber (1.2um)
Applications where Grade C Glass Fiber filters may be utilized are: Total suspended solids analysis, cell harvesting, industrial water analysis and binding assays. This filter is the standard in most parts of the world for the collection of suspended solids in natural, potable and industrial waste water.
Grade D Glass Fiber (2.7um)
Grade D Glass Fiber is a much thicker fiber filter than other glass fiber grades, this allows them to have a very high loading capacity and prove effective for use as a pre-filter. These filters can be used along with Grade B Glass Fiber Filters to provide more protection in liquid scintillation applications where high loading capacities are necessary.
Grade F Glass Fiber (0.7um)
Grade F Glass Fiber is typically utilized in applications where the filtration of precipitated proteins and biochemical solutions are required. They are also frequently seen being used for DNA binding and purifying.
If you are still struggling to find the appropriate filters for your application Tisch Scientific offers free product samples for testing prior to purchase. In order to request samples simply click the green, “Request a Sample,” button on any product page. Or click here. We will promptly send you samples within a business day.