Chemical detector
First Claim
1. Apparatus for chemical detection, comprising:
- a cap for coupling with a sample vial containing a sample which includes at least one chemical to be detected;
a reagent vial included in the cap, the reagent vial containing a liquid reagent and including a membrane which retains the liquid reagent above the membrane, wherein said membrane is permeable to the chemical to be detected; and
means, coupled to the cap, for moving the reagent vial between a first position and a second position, the chemical being prevented from permeating the membrane and entering the reagent vial when the reagent vial is in the first position, the chemical being allowed to permeate the membrane and enter the reagent vial when the reagent vial is in the second position.
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Accused Products
Abstract
Apparatus for chemical detection includes a cap for coupling with a sample vial containing a sample. The sample includes at least one chemical to be detected. The cap includes a reagent vial which contains a liquid reagent. The reagent vial includes a membrane which substantially retains the liquid reagent and which is substantially permeable to the chemical to be detected. The reagent vial can be opened to allow the chemical to permeate and enter the reagent vial and closed to substantially prevent the chemical from permeating the membrane and entering the reagent vial. In some embodiments, the reagent vial is opened and closed by movement of the reagent vial. In some other embodiments, the reagent vial remains stationary while a device moves to open and close the stationary reagent vial.
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Citations
62 Claims
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1. Apparatus for chemical detection, comprising:
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a cap for coupling with a sample vial containing a sample which includes at least one chemical to be detected; a reagent vial included in the cap, the reagent vial containing a liquid reagent and including a membrane which retains the liquid reagent above the membrane, wherein said membrane is permeable to the chemical to be detected; and means, coupled to the cap, for moving the reagent vial between a first position and a second position, the chemical being prevented from permeating the membrane and entering the reagent vial when the reagent vial is in the first position, the chemical being allowed to permeate the membrane and enter the reagent vial when the reagent vial is in the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 60)
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22. Apparatus for chemical detection, comprising:
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a cap for coupling with a sample vial containing a sample, the cap defining a passage through which pass vapors from the sample, the vapors including at least one chemical to be detected; a reagent vial included in the cap, the reagent vial containing a liquid reagent which is reactable with the chemical to form a reaction product having at least one detectable property related to the concentration of the chemical, and the reagent vial including a membrane which retains the liquid reagent and the reaction product above the membrane and within the reagent vial, wherein said membrane is permeable to the chemical to be detected; and means, coupled to the cap, for moving the reagent vial between a first position and a second position, the reagent vial being disposed from the passage when in the first position such that the vapors are prevented from impinging upon the membrane, the reagent vial being aligned with the passage when in the second position such that the vapors are allowed to diffuse into contact with the membrane. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 61)
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39. Apparatus for chemical detection, comprising:
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a cap for coupling with a sample vial containing a sample which includes at least one chemical to be detected; a reagent vial includes in the cap, the reagent vial containing a liquid reagent and including a membrane which retains the liquid reagent above the membrane, wherein said membrane is permeable to the chemical to be detected; and movable means coupled to the cap and being movable between a first position and a second position, the chemical being allowed to permeate the membrane and enter the reagent vial when the movable means is in the second position, the chemical being prevented from permeating the membrane and entering the reagent vial when the movable means is in the first position. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 62)
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Specification