Chemistry: physical processes – Physical processes – Crystallization
Patent
1976-02-26
1977-10-11
Wolk, Morris O.
Chemistry: physical processes
Physical processes
Crystallization
23253R, 23259, 734256, 356181, G01N 110, G01N 2100, G01N 3318
Patent
active
040532828
ABSTRACT:
A portion of a colorimetric liquid analyzer including a glass tube cell, a plunger mounted for reciprocation in the cell and having a passage to the cell, and a long liquid sample supply tube running from a body of liquid to be tested to the plunger passage. A "T" connector is provided in the tube and a pair of on-off valves which, together with the plunger, act to pump fixed volumes of fluid into and out of the cell. Means are provided to pump substantial air bubbles into the tube near its intake end, and the air bubbles are separated from the liquid through a vertical section of the T-connector so that only liquid is pumped into the cell. Preferably, acid is also added to the tube at its intake end to help dissolve particulate matter while the air bubbles continuously sweep the tube clean.
REFERENCES:
patent: 2079474 (1937-05-01), Walsh
patent: 2797149 (1957-06-01), Skeggs
patent: 3186235 (1965-06-01), Ferrari
patent: 3334018 (1967-08-01), Smythe
patent: 3401591 (1968-09-01), Anthon
patent: 3524366 (1970-08-01), Hrdina
patent: 3572998 (1971-03-01), Anthon
patent: 3692490 (1972-09-01), Hall
patent: 3826615 (1974-07-01), Smythe et al.
patent: 3921439 (1975-11-01), Burns
Buck Michael D.
Hach Clifford C.
Hach Chemical Company
Turk Arnold
Wolk Morris O.
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