Filter in sample drawing device

Details Filter in sample drawing device Filter in sample drawing device

1975-02-05

1976-06-29

Hart, Charles N.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Check valve

210411, 210449, 210459, B01D 3500

Patent

active

039666069

ABSTRACT:
The present invention relates to a double leaf filter head for drawing clear samples from a liquid to be analysed. The filter head is of especial use in drawing samples of phoshoric acid whose SO.sub.4 .sup.-.sup.- ion content is to be analysed by turbidimetric methods.

REFERENCES:
patent: 3193103 (1965-07-01), Snyder
patent: 3712795 (1973-01-01), Hamshere et al.

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