Lactose test apparatus

• US 7,182,844 B1
• Filed: 05/23/2003
• Issued: 02/27/2007
• Est. Priority Date: 05/28/2002
• Status: Expired due to Fees

• Current Assignee: Michael Mallary
• Original Assignee: Michael Mallary
• Inventors: Mallary, Michael
• Primary Examiner(s): NOGUEROLA, ALEXANDER STEPHAN
• Application Number:
  US10/444,657
• Time in Patent Office: 1,376 Days
• Field of Search: 20440301-40315, 205/777.5, 205/778, 422/56, 422/57, 422/82.05, 422/82.06, 435/14, 435/25, 435/4
• US Class Current: 204/403.01
• CPC Class Codes: G01N 21/78 producing a change of colour

Abstract

A test for the presence of lactose in a sample, in which the test comprises a) treating the sample with lactase enzyme thus converting the lactose into glucose and galactose b) testing the sample for the presence of glucose using any one of a variety of prior art tests for the presence of glucose.

Claims

1. A lactose test apparatus comprising:

(a) a test cell containing a glucose indicator;

(b) a means to add an agent that converts lactose to glucose to the said test cell; and

(c) an apparatus to measure glucose concentration in said test cell before and after said addition of said lactose converting agent to said test cell.

2. The lactose test apparatus of claim 1, in which said glucose indicator alters the optical absorption properties of said test cell in the presence of glucose.

3. The lactose test apparatus of claim 2, in which said apparatus to measure glucose concentration of claim 1 further comprises:

(a) a light source illuminating said test cell;

(b) a means to measure the reflected light intensity from said test cell; and

(c) a means to display the difference between the magnitudes of said reflected light intensity before and after adding an agent that converts lactose to glucose to said test cell.

4. The lactose test apparatus of claim 3, further comprising a means to display the initial magnitude of said reflected light intensity.

5. The lactose test apparatus of claim 1, in which said glucose indicator alters the electrolytic properties of said test cell in the presence of glucose and the said apparatus to measure glucose concentration further comprises:

(a) a pair of electrodes in said test cell;

(b) a means to apply an electrical potential between said electrodes;

(c) a means to measure the electrolytic current of said test cell; and

(d) a means to display the magnitude of said electrolytic current.

6. The lactose test apparatus of claim 5, further comprising a means to display the difference between the magnitudes of the electrolytic currents in said test cell of claim 1 between the initial value of said electrolytic current and the final value of said electrolytic current after the said addition of said agent that converts lactose to glucose in said test cell.

7. A lactose test apparatus comprising:

(a) a test cell containing a glucose indicator in which said glucose indicator alters the optical absorption properties of said test cell in the presence of glucose; and

(b) a test cell containing an agent that converts lactose to glucose and the same said glucose indicator.

8. A lactose test apparatus comprising:

(a) a test cell containing a glucose indicator in which said glucose indicator alters the optical absorption properties of said test cell in the presence of glucose; and

(b) a means to add an agent that converts lactose to glucose to the said test cell.

9. The lactose test apparatus of claim 8, in which said test cells further comprise a means to exclude solids from the optical detection surface of said test cell.

10. A lactose test apparatus of comprising:

(a) a first test cell containing a glucose indicator in which said glucose indicator alters the optical absorption properties of said test cell in the presence of glucose;

(b) a second test cell containing an agent that converts lactose to glucose and the same said glucose indicator; and

(c) an apparatus to measure glucose concentration in said test cells.

11. The lactose test apparatus of claim 10, in which said apparatus to measure glucose concentration further comprises:

(a) a light source illuminating said test cells;

(b) a means to measure the reflected light intensity from each of said test cells; and

(c) a means to display the magnitudes of said reflected light intensities.

12. The lactose test apparatus of claim 10, in which said apparatus to measure glucose concentration further comprises:

(a) a light source illuminating said test cells;

(b) a means to measure the reflected light intensity from each of said test cells; and

(c) a means to display the difference between the magnitudes of said reflected light intensities.

13. The lactose test apparatus of claim 12, further comprising a means to display the magnitude of the electrolytic current in said first test cell of claim 10.

14. The lactose test apparatus of claim 10, in which said test cells further comprise a means to exclude solids from the optical detection surface of said test cells.

15. A lactose test apparatus comprising:

(a) a first test cell containing a glucose indicator in which said glucose indicator alters the electrolytic properties of said test cell in the presence of glucose;

(b) a second test cell containing an agent that converts lactose to glucose and the same said glucose indicator;

(c) an apparatus to measure glucose concentration in said test cells and the said apparatus to measure glucose concentration further comprises;

(d) a pair of electrodes in each of said test cells;

(e) a means to apply an electrical potential between each of said electrode pairs;

(f) a means to measure the electrolytic current in each of said test cells; and

(g) a means to display the magnitude of said electrolytic currents.

16. A lactose test apparatus comprising:

(a) a first test cell containing a glucose indicator in which said glucose indicator alters the electrolytic properties of said test cell in the presence of glucose;

(b) a second test cell containing an agent that converts lactose to glucose and the same said glucose indicator;

(c) an apparatus to measure glucose concentration in said test cells and said apparatus to measure glucose concentration further comprises;

(d) a pair of electrodes in each of said test cells;

(e) a means to apply an electrical potential between each of said electrode pairs;

(f) a means to measure the electrolytic current in each of said test cells; and

(g) a means to display the difference in magnitude of said electrolytic currents.

17. The lactose test apparatus of claim 16, further comprising a means to display the magnitude of the electrolytic current in said first test cell.

18. A lactose test apparatus comprising:

(a) a test cell containing a glucose indicator which alters the optical absorption properties of said test cell in the presence of glucose;

(b) an agent that converts lactose to glucose; and

(c) a means to exclude solids from the optical detection surface of said test cell.

19. A lactose test apparatus comprising:

(a) a test cell containing a glucose indicator which alters the optical absorption properties of said test cell in the presence of glucose;

(b) an agent that converts lactose to glucose; and

(c) a means to exclude solids from the optical detection surface of said test cells.

20. A lactose test apparatus comprising:

(a) a test cell containing a glucose indicator which alters the optical absorption properties of said test cell in the presence of glucose;

(b) an agent that converts lactose to glucose; and

(c) a means to exclude solids from the optical detection surface of said test cell.

21. A lactose test apparatus comprising:

(a) a test cell containing a glucose indicator which alters the optical absorption properties of said test cell in the presence of glucose,

(b) a means to add an agent that converts lactose to glucose to the said test cell;

(c) an apparatus to measure glucose concentration in said test cell before and after said addition of said lactose converting agent to said test cell; and

(d) a means to exclude solids from the optical-detection surface of said test cell.