Arrangements for preparative route leading to water analysis

Details Arrangements for preparative route leading to water analysis Arrangements for preparative route leading to water analysis

1987-09-25

1990-11-06

Wax, Robert A.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

422 78, B01L 302

Patent

active

049684850

ABSTRACT:
The disclosure is concerned with arrangements which are disposed on a preparative route leading to water analysis from extraction of water samples. Specifically, an injection unit for injecting water samples into a combustion chamber is improved, wherein a slide block type is employed, but conventional trouble of accumulation of involatile matters around injection site is avoided by change of designs with a slide block and an injection pipe. Next, a micro syringe unit for extraction, measurement of water samples is improved by arranging two syringes connected in branch, wherein a second syringe is intended to feed a quantity of water to dilute a target sample water which will be extracted to a first syringe and in operation, the second dilution water will be influenced to the target first water on route leading to the first syringe. Third, a calibration unit is introduced to mix a reference water sample which has been known of its volume and its concentration into a target water sample to be analyzed. The arrangement includes intervention of a four port two way valve to make communications to both the routes for the sample water and the reference, wherein in operation the reference water is flown to fill one passage in the two way valve while the sample water is flown to fill another passage therein, and then these two passages within the valve are exchanged mechanically to displace the sample water with the reference. Introduction of such calibration will give more correct results of water analyses.

REFERENCES:
patent: 3296435 (1967-01-01), Teal et al.
patent: 3672841 (1972-06-01), Freeman et al.
patent: 4619902 (1986-10-01), Bernard

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