Ethylene oxide monitoring device
First Claim
1. An ethylene oxide monitoring device comprising a reactive coating sensitive to ethylene oxide on an impermeable substrate, the reactive coating including a layer of activated alumina particles, coated with p-nitrobenzyl pyridine and ammonium chloride, adapted to instantly produce a color intensity change directly related to the exposure of the reactive coating to ethylene oxide upon addition of a developer, the color intensity change indicating an exposure sensitivity less than one ppm for an eight hour time weighted average.
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Accused Products
Abstract
Monitoring exposure to ethylene oxide using a dosimeter or monitoring device avoids using devices that collect a sample for future testing or devices that must be sent away for lab analysis. The device comprises a reactive coating including a layer of activated alumina particles coated with p-nitrobenzyl pyridine and ammonium chloride, and is adapted to instantly produce a color intensity change directly related to the dosage of the reactive coating to ethylene oxide upon the addition of a developer.
54 Citations
43 Claims
- 1. An ethylene oxide monitoring device comprising a reactive coating sensitive to ethylene oxide on an impermeable substrate, the reactive coating including a layer of activated alumina particles, coated with p-nitrobenzyl pyridine and ammonium chloride, adapted to instantly produce a color intensity change directly related to the exposure of the reactive coating to ethylene oxide upon addition of a developer, the color intensity change indicating an exposure sensitivity less than one ppm for an eight hour time weighted average.
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18. The monitoring device according to Cl.iam 17 wherein the p-nitrobenzyl pyridine is in about 1-2% acetone solution.
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26. A method of determining time weighted average ethylene oxide dosage, comprising the steps of:
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exposing a reactive coating sensitive to ethylene oxide to the atmosphere, the reactive coating including a layer of activated alumina particles coated with p-nitrobenzyl pryidine and ammonium chloride, adapted to instantly produce a color intensity change directly related to the exposure of the reactive coating to ethylene oxide upon addition of a developer, the color intensity change indicating an exposure sensitivity less than one ppm for an eight hour time weighted average; adding the developer to the reactive coating after exposure; and comparing the color intensity of the reactive coating with a color comparison means to determine if time weighted average ethylene oxide dosage is above a predetermined level. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification