LARK® Quantitative Filter Paper, Ashless, Grade 42

GRADE 42 A world standard for critical gravimetric analysis with the finest particle retention of all cellulose filter papers. Typical analytical precipitates include barium sulfate, meta stannic acid, and finely precipitated calcium carbonate.

Filtration Speed- Slow Retention-crystalline, collects fine precipitates such as SrSo, BaSo, HgCrCo, and colloidal dispersion. Used for critical gravimetric analysis also. Particle retention up to 2.5um, alpha-cellulose content>98%.GRADE 42 Filtration Speed – Slow Retention-crystalline, particle retention up to 2.5 µm, alpha-cellulose content >98%, used in typical analytical preciprates include SrSo4 , BaSo4 , HgCrCo4 and colloidal dispersion, gravimetric analysis.