Whatman Grade No. 1 Filter Paper Whatman. 1 Filter Paper 1001-150 is most commonly used for the preconcentration of gases and liquids containing water. Practically any liquid may be preconcentrated and then allowed to flow through this Whatman Grade No. 1 Filter paper. The paper is unaffected by nearly all liquids including water resulting in the paper being nearly transparent. In addition this paper can also be employed for the preconcentration of gases and liquids resulting from the distillation of a compound resulting in a discernible change in color. Grading of this paper relates to its porosity or filterability and depends on the degree of filtration required to obtain the required result. Whatman Grade No. 1 Filter Paper 1001-150 is whatman's general purpose filter paper and is intended for general laboratory use. Whatman Grade No. 1 Filter Paper 1001-150 is particularly useful in the preconcentration stage of many distillation procedures in order to retain the greater part of the filtrate and eliminate the pre-concentration process. Whatman Grade No. 1 Filter Paper 1001-150 comes in a pack of 100. Specifications for Whatman Grade No. 1 Filter Paper Whatman 1001-150 : Size cm: 15.0 dia. Whatman No.: 1001-150 Unit: Pack of 100 Porosity: Medium Flow Rate: Medium Particle Retention: 11 m (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Whatman products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Filters with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Whatman Filters. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Whatman Grade No. 1 Filter Paper Whatman 1001-150/ 28450-150 we carry a full complement of Filters as well as other product offerings from Whatman. We also carry a full line of Whatman accessories to help meet your laboratory and scientific needs. For a complete selection of Whatman Filters please visit our Whatman page. For more brand name Filters please visit our Filters store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Whatman Grade No. 1 Filter Paper Whatman 1001-150