Water testing capsule using water soluble film membranes

• US 5,756,049 A
• Filed: 10/25/1996
• Issued: 05/26/1998
• Est. Priority Date: 10/25/1996
• Status: Expired due to Term

• Current Assignee: Hach Company (Veralto Corp.)
• Original Assignee: Hach Company (Veralto Corp.)
• Inventors: Brayton, Scott V.
• Primary Examiner(s): ALEXANDER, LYLE
• Application Number:
  US08/740,225
• Time in Patent Office: 578 Days
• Field of Search: 422/55-58, 422/61, 422/102, 436/163, 436/101, 436/103, 436/84, 436/110, 436/113, 436/39
• US Class Current: 422/430
• CPC Class Codes: B01L 2400/0677 phase change valves; Meltable, freezing, dissolvable plugs; Destructible barriers
• CPC Class Codes: B01L 3/50825 Closing or opening means, corks, bungs closures for containers B65D; means for removing stoppers B67B7/02
• CPC Class Codes: B01L 3/5085 for multiple samples, e.g. microtitration plates
• CPC Class Codes: B65D 71/403 formed by folding several blanks
• CPC Class Codes: B65D 81/3205 Separate rigid or semi-rigid containers joined to each other at their external surfaces B65D81/3288 takes precedence
• CPC Class Codes: G01N 33/18 Water
• CPC Class Codes: Y10S 436/808 Automated or kit
• CPC Class Codes: Y10S 436/81 Tube, bottle, or dipstick
• CPC Class Codes: Y10T 436/255 including use of a solid sorbent, semipermeable membrane, or liquid extraction
• CPC Class Codes: Y10T 436/2575 Volumetric liquid transfer

Abstract

A capsule package and a touch-free method for water analysis. It allows for addition of dry ingredients and aqueous test reagent without any human intervention, and therefore substantially decreases the possibility for analysis error. Furthermore, it eliminates physical contact between the operator and the chemical reagent, thereby enhancing safety. Importantly, the packaging system allows for film protection of a water soluble membrane so that it is damage free prior to use.

Claims

1. A capsule package for touch-free water analysis, comprising:

a sheet of capsule holding material having at least one aperture formed in said sheet;

at least one capsule container extending through said aperture of said holding material;

said capsule container having one sealed end and one open mouth end;

a moisture and gas impermeable barrier sheet covering at least a portion of said holding material and the mouth end of said capsule container to seal the mouth end of said capsule container;

said capsule containing a water test reagent and having a water soluble barrier membrane across said open mouth end of said capsule; and

whereby said capsule container may be pulled free of said capsule package and used in a reagent touch-free water analysis.

2. The capsule package of claim 1 wherein the water soluble barrier membrane is polyvinyl alcohol.

3. The capsule package of claim 1 wherein the sheet of capsule holding material is cardboard.

4. The capsule package of claim 1 wherein the moisture and gas impermeable barrier is a foil covering sheet.

5. The capsule package of claim 1 wherein the capsule has at least two water soluble membranes to separate the capsule into more than one compartment.

6. The capsule package of claim 1 wherein the test reagent is selected from the group consisting of test reagents for water analysis. Examples include chlorine testing, iron testing, phosphate testing, pH testing, ammonia testing and nitrate testing.

7. The apparatus of claim 1 wherein said barrier sheet is secured to said holding material such that when the capsule container is pulled free from the capsule package, the mouth end of the capsule container becomes unsealed.

8. The apparatus of claim 7 wherein said barrier sheet is secured to said holding material by an adhesive.

9. The apparatus of claim 1, further comprising a lip formed on the capsule container proximate the open mouth end, wherein said lip has a diameter larger than a diameter of the aperture formed in the sheet of holding material.

10. A capsule package for touch-free water analysis comprising:

a sheet of capsule holding material;

a plurality of apertures formed in said capsule holding material;

a plurality of capsule containers, each extending at least partially through one of said apertures in said capsule holding material;

at least one barrier sheet secured to the capsule holding material and disposed over at least one of said apertures of said capsule holding material and covering a portion of at least one of said capsule containers;

each of said capsule containers containing a water test reagent and having a water soluble barrier membrane containing said water test reagent within said capsule container; and

wherein each of said capsule containers can be pulled from the sheet of capsule holding material and from the barrier sheet and used in a reagent touch-free water analysis.

11. The apparatus of claim 10, wherein each of said capsule containers includes an open end, wherein the barrier sheet seals the open end of the capsule containers while the capsule containers are extended through the apertures in the capsule holding material.