Abstract:
A kit for determining if a shock treatment is required for a water source may comprise a test strip having at least two chemically treated test areas. One of the areas is responsive in color to a concentration of free chlorine in the water and another test area is responsive in color to a concentration of total chlorine in the water. A chlorine indicator scale may be provided on a substrate, such as a label, and comprises a plurality of pairs of colored indicia and each pair of colored indicia representing a color pattern indicating a concentration, or range of concentrations, of total chlorine and free chlorine in the water. An alphanumeric designation may be provided adjacent to each pair of indicia indicating whether a shock treatment is required for the water source based on a color pattern the associated indicia pattern.
Abstract:
A chemical indicator or ink, and methods for manufacture thereof, comprises at least one carbon dioxide-sensitive reactive dye which is capable of detecting changes in carbon dioxide concentration in a fluid under fluid and/or gas phase pressure of carbon dioxide above approximately (1) bar. The present chemical indicators or inks are useful in the monitoring of relatively high carbon dioxide pressure environments, such as in carbonated drinks. The present invention also relates to containers for holding a carbonated liquid, and closures therefore, comprising a carbon dioxide indicator or a carbon dioxide-sensitive ink, wherein the carbon dioxide indicator and/or the ink comprises at least one carbon dioxide-sensitive reactive dye which is capable of detecting changes in carbon dioxide concentration in a fluid under fluid and/or gas phase pressure of carbon dioxide above approximately (1) bar.
Abstract:
An ink composition and method by which dissolved ozone which can be contained in a liquid to be examined can be more easily detected/determined with higher certainty. The method, which is for detecting dissolved ozone contained in a liquid to be examined, comprises (1) a step in which an ink composition for dissolved-ozone detection comprising at least one water-soluble dye selected among anthraquinone dyes, azo dyes, methine dyes, oxazine dyes, triarylmethane dyes, and xanthene dyes and water is dropped into the liquid to be examined and (2) a step in which the ink composition dropped is examined for a color change.
Abstract:
The present invention refers to a process of disinfection- sterilisation through exposure to gaseous ozone and to a related apparatus for the actuation of the process comprising: an electric ozone generator (3); means (4) suitable for forcing a flow of air through the ozone generator; a treatment chamber (1) having an inlet connected to the outlet of the ozone generator and a vent outlet; a first filter (2) housed in the vent outlet containing a filtering material suitable for abating and/ or reconverting the ozone into oxygen, for venting into the atmosphere a flow of air free of ozone of flow rate substantially equal to that forced into the chamber; a conduit (5) outside the chamber, wherein at least one fan is housed through which the gaseous content inside the chamber is circulated; a second and a third filter (7,8) both containing a filtering material suitable for abating and/ or reconverting the ozone contained in the circulating gaseous flow into oxygen, which are housed in the conduit respectively upstream and downstream of the fan; means for separately activating and stopping the electric ozone generator (3) and the circulation fan (6).
Abstract:
A composition and method of determining the remaining service life in an impregnated adsorbent composition. Composition is an indicating absorbent composition that contains both an impregnated adsorbent component and a reactive indicator. The indicating absorbent composition is used for air purification in the same manner that any impregnated adsorbent filtration medium is used, except that it contains an internal means for determining its remaining service life. The reactive indicator is designed to undergo a color change or loss of color intensity upon contact with noxious or hazardous contaminants, wherein the indicating absorbent composition removes contaminants from a contaminated air stream, thereby affording an optical means of determining the indicating absorbent composition remaining service life. In one embodiment, the color change is in the visible spectrum, such that a simple colorimetric comparison of the reactive indicator and a standardized or calibrated color chart is used to ascertain the remaining service life of the indicating absorbent composition.
Abstract:
A method for identifying the redox activity of a subject compound is disclosed. The method can be performed aerobically and can include forming a mixture comprising a free-radical precursor and a compound to be tested, and converting the free-radical precursor into a free-radical anion and a free-radical cation. After the free radical cation and the free radical anion have been formed, the relative redox activity of the subject compound may cause a difference in the rate of photo-bleaching of the mixture and/or the rate of superoxide generation. These differences can be quantified and used to identify the redox activity of the subject compound. This sensitive technique for measuring redox activity can be used to screen compounds for various biological applications. Drugs also can be developed based on the relationship between redox activity and biological activity for particular biological applications.