Colorimetric detector for ozone and method of preparation

Details Colorimetric detector for ozone and method of preparation Colorimetric detector for ozone and method of preparation

1989-01-17

1989-08-22

Richman, Barry S.

Food or edible material: processes, compositions, and products

Product with added inedible feature other than that which...

Feature is casing

427384, 427395, 436166, G01N 3300

Patent

active

048596078

ABSTRACT:
3-Methyl-2-benzothiazolinone acetone azine and 2-phenylphenol in 1:4 molar solid mixture reacts specifically with ozone at concentrations of environmental interest to produce a red-violet color. The response is proportional, but not rectilinearly, to ozone concentration at constant exposure time and to time of exposure at constant ozone concentration. The reagent is intended for use with visual comparison standards in passive monitoring devices. No interference was observed from atmospheric oxygen, nitrogen dioxide, sulfur dioxide, or bromine or iodine vapor. Chlorine produced a light yellow color.

REFERENCES:
patent: 3397966 (1968-08-01), Plantz
patent: 4260679 (1981-04-01), Tsudal et al.
patent: 4820632 (1989-04-01), Frey et al.
Lambert, J. L.; Paukstells, J. V.; "3-Methyl-2-benzothiazolinone Acetone Azine with 2-Phenylphenol as a Solid Passive Monitoring Reagent for Ozone", Environ. Sci. Technol., 1989, vol. 23, No. 2, pp. 241-243.

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