Macherey-Nagel Filter Papers, folded, grade MN 619 G 1/4, 450 mm, 100 pcs.

Slow, phosphate-free filter paper for soil analysis. Typical measurements: orthophosphate: <0.005 mg/L (DIN EN ISO 6878); Total nitrogen bounded: <0.5 mg/L (DIN EN 12260); Calcium: <0.5 mg/L (EN ISO 11885); Magnesium: <0.5 mg/L (EN ISO 11885).