Compact apparatus for measuring a liquid component in a liquid s

Details Compact apparatus for measuring a liquid component in a liquid s Compact apparatus for measuring a liquid component in a liquid s

1997-09-03

1999-10-05

Warden, Robert

Chemistry: electrical and wave energy

Apparatus

Electrolytic

422102, 422104, G01N 2726

Patent

active

059617993

ABSTRACT:
In a liquid component measuring apparatus including a measuring cell (11) which measures a specific component of a predetermined amount of liquid sample by diluting, as diluted liquid sample, the predetermined amount of liquid sample with a buffer solution having a pH buffer capacity and a support electrolyte, the measuring cell includes a metering section (12) having an upper part tapered upward and having a metering space therein. A sample injection port (19) is formed at a top of the upper part. A buffer injection port (18) supplies the buffer solution to the metering space so that the metering space is completely filled with the buffer solution. Disposed around the metering section, a reservoir (13) temporarily reserves, as a reserved buffer solution, the buffer solution which overflows from the sample injection port when the buffer solution is supplied to the metering space by the buffer injection port to be completely filled into the metering space and when the predetermined amount of liquid sample is introduced into the metering space from the buffer injection port so that the metering space is filled with the diluted liquid sample. Disposed in the metering space, a stirrer (17) stirs the diluted liquid sample. Disposed in the metering space, a sensor (15) senses the specific component in the diluted liquid sample. A buffer discharge port (14) discharges the reserved buffer solution from the reservoir into outside of the measuring cell.

REFERENCES:
patent: 3701716 (1972-10-01), Deuringer et al.
patent: 4073713 (1978-02-01), Newman
patent: 4894137 (1990-01-01), Takizawa et al.
patent: 5264103 (1993-11-01), Yoshioka et al.
patent: 5429726 (1995-07-01), Johnson et al.
patent: 5507935 (1996-04-01), Coleman et al.
patent: 5651869 (1997-07-01), Yoshioka et al.

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