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英国whatman沃特曼Filtration aids助滤剂详细介绍：
Filtration aids 助滤剂
The range of Whatman filtration aids are available in three forms and pack sizes.
ASLESS POWDER - Cellulose powder with an ash content of 0.015% and suitable for use as a filter bed
ASHLESS FLOC - Bulky mass of dry dispersed cellulose fibres which assist coagulation by forming a more flocculent suspension.  Ash content is 0.015% by weight.
ASHLESS CLIPPINGS - These are offcuts for maceration to make a pure filter pulp, which settles under suction in a funnel to form a thick, highly retentive filter bed.