Ahlstrom Filtration Grade 392 Low Ash Quantitative Filter Paper, 5.5 cm dia

Ahlstrom manufactures a series of extremely high purity, acid washed filter papers designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra-pure, reverse-osmosis water and are further treated with dilute acid to remove any remaining organic and inorganic impurities. All quantitative grades are manufactured in a strictly controlled environment that ensures high uniformity and high purity from filter to filter. These hardened low ash grades have an intermediate ash content between standard qualitative grades and ashless grades. They are suitable for routine gravimetric analysis and typical preparation of samples for use in analysis involving instrumental techniques. This grade has a medium flow rate and good particle retention and can be used for a wide variety of applications that require a lower ash content than standard qualitative grades, including gravimetric analysis of components in heavy industry.

• Quantitative analysis
• Acid-wash treated
• High wet-strength
• Consistent performance
• Bulk packaging