Titration apparatus using a syringe

• US 6,301,980 B1
• Filed: 06/30/2000
• Issued: 10/16/2001
• Est. Priority Date: 12/18/1998
• Status: Expired due to Fees

• Current Assignee: The Munderloh 2006 Revocable Trust
• Original Assignee: Neil Munderloh
• Inventors: Munderloh, Neil
• Primary Examiner(s): RAEVIS, ROBERT R
• Application Number:
  US09/607,621
• Time in Patent Office: 473 Days
• Field of Search: 738/641.3, 738/641.6, 738/648.1, 738/648.7, 738/642.1, 366/140, 422/75-77, 422/100
• US Class Current: 73/864.21
• CPC Class Codes: G01N 31/16 using titration
• CPC Class Codes: G01N 31/162 Determining the equivalent point by means of a discontinuity

Abstract

A titration apparatus includes a syringe and a stirring arrangement located within the syringe for mixing of its content. A single narrow bore for drawing and discharging of liquids and an arrangement for measuring volume of liquids are also provided. The stirring arrangement is located within the syringe.

Claims

1. A titration apparatus, comprising:

a syringe comprising a syringe barrel and a plunger inserted within said syringe barrel;

a variable sealed space within said syringe formed by said syringe barrel and said plunger, for receiving an unknown liquid sample and a liquid titrant;

a single narrow bore needle attached to said syringe barrel through which said sample and said titrant can be drawn into or discharged from said variable sealed space;

a magnetic stirring bar located within said syringe for mixing said sample and said titrant within said variable sealed space;

a magnetic driving means within said syringe for driving of said magnetic stirring bar; and

volume measuring means located on said syringe for measuring volumes of said unknown sample and said titrant drawn into said syringe.

2. The titration apparatus in accordance with claim 1, wherein said magnetic stirring bar is located within said variable sealed space and said magnetic driving means is located within said plunger.

3. The titration apparatus in accordance with claim 1, which further comprises a titration sensor attached to or within said syringe.

4. The titration apparatus in accordance with claim 3, wherein said titration sensor is a pH sensor.

5. The titration apparatus in accordance with claim 3, wherein said titration sensor is attached to said syringe barrel.

6. The titration apparatus in accordance with claim 3, wherein said titration sensor is situated within said plunger.

7. The titration apparatus in accordance with claim 1, wherein said volume measuring means comprises a scale and further comprises a vernier.

8. The titration apparatus in accordance with claim 1, wherein said syringe further comprises a digital readout.

9. The titration apparatus in accordance with claim 1, wherein said syringe further comprises a thumb wheel for fine movement control.

10. The titration apparatus in accordance with claim 1, wherein said magnetic stirring bar is located within said variable sealed space and said magnetic driving means is located within said syringe barrel.

11. The titration apparatus in accordance with claim 1, wherein said magnetic driving means comprises at least one movable drive magnet energized by an electrical motor.

12. The titration apparatus in accordance with claim 11, wherein said drive magnet is situated within said syringe barrel.

13. The titration apparatus in accordance with claim 11, wherein said drive magnet is situated within said plunger.

14. The titration apparatus in accordance with claim 1, wherein said magnetic driving means comprises a plurality of NS switched electromagnets.

15. The titration apparatus in accordance with claim 1, wherein said syringe further comprises a displacement sensor.

16. A titration apparatus, comprising:

a syringe comprising a syringe barrel and a plunger inserted within said syringe barrel;

a variable sealed space within said syringe formed by said syringe barrel and said plunger, for receiving an unknown liquid sample and a liquid titrant;

a single bore needle attached to said syringe barrel through which said sample and said titrant can be drawn into or discharged from said variable sealed space;

stirring means located within said syringe for mixing said sample and said titrant within said variable sealed space; and

volume measuring means located on said syringe for measuring volumes of said unknown sample and said titrant drawn into said syringe.

17. The titration apparatus in accordance with claim 16, which further comprises a titration sensor attached to or within said syringe.

18. The titration apparatus in accordance with claim 16, wherein said syringe further comprises a displacement sensor.

19. The titration apparatus in accordance with claim 16, wherein said syringe further comprises a thumb wheel for fine movement control.

20. A titration apparatus, comprising:

a syringe comprising a syringe barrel and a plunger inserted within said syringe barrel;

a variable sealed space within said syringe formed by said syringe barrel and said plunger, for receiving an unknown liquid sample and a liquid titrant;

a single narrow bore needle attached to said syringe barrel through which said sample and said titrant can be drawn into or discharged from said variable sealed space;

a magnetic stirring bar located within said variable sealed space for mixing said sample and said titrant within said variable sealed space;

a magnetic driving means located within said syringe barrel or within said plunger for driving said magnetic stirring bar;

volume measuring means located on said syringe for measuring volumes of said unknown sample and said titrant drawn into said syringe; and

a titration sensor attached to or within said syringe.