Borosil Filter Paper | Buy Quantitative Filter Papers & Ashless Filter Paper

Ashless filters (avg ash content 0.004 %) for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.

Acid-washed and rinsed with water to neutralise it
Free of minerals and metallic ions,hence ideal for the detection of metallic ions

Specification:

Grade	Sample	Speed	Retention rate* [µm]	Filtration Herzberg (s)	Thickness (mm)	Weight [g/m²]
B58940	Fine crystalline precipitates	Medium	2-4	450	0.17	84
B58941	Coarse and gelatinous precipitates	Fast	12-25	50	0.19	79
B58942	Very fine crystalline precipitates	Slow	lt;2	750**	0.16	84
B58943	Coarse precipitates	Medium Fast	4-12	140	0.18	85
B58944	Fine crystalline precipitates	Slow thin	2	900	0.15	74

* Approximate values, ** Measured with 100mm water column instead of 50 mm