Process and apparatus for testing for substances in liquids

Details Process and apparatus for testing for substances in liquids Process and apparatus for testing for substances in liquids

1994-06-08

1995-08-29

Alexander, Lyle A.

Chemistry: analytical and immunological testing

Metal or metal containing

Zn, cd, hg, sc, y, or actinides, or lanthanides

436 77, 436169, 422 61, G01N 3320

Patent

active

054459656

ABSTRACT:
A method and apparatus for the detection of nutrients and contaminants in a liquid sample. The sample is added to a container which is then capped with a cap assembly which contains crushable reagent containers. As the cap is tightened, the crushable capsules release reagent which reacts with the substance to be detected, causing a detectable color change. The level of the substance in the sample correlates with the color change which can be quantitated by reading the reaction product in a spectrophotometer, or by comparing to known standards. The method is especially suitable for the detection of heavy metal contaminants such as lead, in drinking water.

REFERENCES:
patent: 3477822 (1969-11-01), Hamilton
patent: 3480398 (1969-11-01), Hamilton
patent: 3582283 (1970-03-01), Mirasol
patent: 3713779 (1973-01-01), Sirago et al.
patent: 3715189 (1973-02-01), Nighohossian et al.
patent: 3940448 (1960-06-01), Furlong
A.O.A.C. Official Methods of Analysis Book, pp. 460-468 (1984).

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