Apparatus having automatic calibration for determining hydrogen

Details Apparatus having automatic calibration for determining hydrogen Apparatus having automatic calibration for determining hydrogen

1981-08-06

1984-01-24

Marantz, Sidney

Chemistry: molecular biology and microbiology

Measuring or testing process involving enzymes or...

Involving oxidoreductase

204403, 435 28, 435291, G01N 2730, G01N 3110, G01N 3500

Patent

active

044277725

ABSTRACT:
Apparatus for determining a concentration of hydrogen peroxide in an aqueous solution featuring (A) a sampling system, (B) a reaction system, (C) an oxygen concentration determining system, (D) an automatic calibration system and (E) a sequence circuit system. One cycle of determination consists of three operating stages. In the first stage, a zero point adjustment and a span adjustment are established to properly calibrate the sensitivity of an oxygen detector, air saturated water or a fresh sample being used as the standard. In the second stage, a sample is introduced and hydrogen peroxide in the sample is decomposed with a hydrogen peroxide decomposing agent. The concentration of oxygen dissolved in the sample is then determined by means of the oxygen detector. In the third stage, the reaction vessel is washed with fresh water or a fresh sample after the discharging of the used sample. Determinations are repeated at a predetermined time interval under the control of the sequence circuit system. Preferably, an oxygen probe is used as the oxygen detector and a catalase solution is used as the hydrogen peroxide decomposing agent.

REFERENCES:
patent: 3838034 (1974-09-01), Groves

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