Low slope ph electrode with charge transfer component

Abstract

An aspect provides a low slope electrode device, including: a low slope measuring electrode for placement in an external sample solution, said low slope measuring electrode comprising: an electrode disposed within a glass container including an internal buffer solution and at least partially enclosing the electrode of the low slope measuring electrode, the glass container having two pH sensitive regions; an external buffer container including an external buffer solution and at least partially enclosing one of the two pH sensitive regions; and a separating element that separates the two pH sensitive regions; wherein: a first pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external sample solution; a second pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external buffer solution; the separating element, the first pH sensitive region, and the second pH sensitive region establish a charge flow circuit through the internal buffer solution, the external buffer solution, and the external sample solution; and the charge flow circuit acts as a voltage divider for the low slope measuring electrode. Other aspects are described and claimed.

What is claimed is: 
     
         1 . A low slope electrode device, comprising:
 a low slope measuring electrode for placement in an external sample solution, said low slope measuring electrode comprising:
 an electrode pairing, wherein a first electrode of the electrode pairing is operatively coupled to a second electrode of the electrode pairing; 
 a glass container including an internal buffer solution and at least partially enclosing the first electrode of the electrode pairing, the glass container having two pH sensitive regions; 
 an external buffer container including an external buffer solution and at least partially enclosing the second electrode of the electrode pairing; and 
   a separating element that separates the two pH sensitive regions;   wherein:   a first pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external sample solution;   a second pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external buffer solution;   the separating element, the first pH sensitive region, and the second pH sensitive region establish a charge flow circuit through the internal buffer solution, the external buffer solution, and the external sample solution; and   the charge flow circuit acts as a voltage divider for the first electrode and the second electrode of the electrode pairing of the low slope measuring electrode.   
     
     
         2 . The low slope electrode device of  claim 1 , further comprising at least one additional electrode. 
     
     
         3 . The low slope electrode device of  claim 2 , wherein the at least one additional electrode comprises a reference electrode. 
     
     
         4 . The low slope electrode device of  claim 2 , wherein the at least one additional electrode comprises a measuring electrode. 
     
     
         5 . The low slope electrode device of  claim 4 , wherein the measuring electrode has a pH sensitivity of about 59 mV/pH unit. 
     
     
         6 . The low slope electrode device of  claim 5 , wherein the electrode pairing of the low slope measuring electrode has a pH sensitivity of about ½ the sensitivity of the measuring electrode. 
     
     
         7 . The low slope electrode device of  claim 1 , wherein the first pH sensitive region of the glass container and the second pH sensitive region of the glass container are separated by insulating glass. 
     
     
         8 . The low slope electrode device of  claim 1 , wherein the first pH sensitive region of the glass container and the second pH sensitive region of the glass container are formed of pH glass. 
     
     
         9 . A system, comprising:
 a low slope measuring electrode for placement in an external sample solution, said low slope measuring electrode comprising:
 an electrode pairing, wherein a first electrode of the electrode pairing is operatively coupled to a second electrode of the electrode pairing; 
 a glass container including an internal buffer solution and at least partially enclosing the first electrode of the electrode pairing, the glass container having two pH sensitive regions; 
 an external buffer container including an external buffer solution and at least partially enclosing the second electrode of the electrode pairing; and 
   a separating element that separates the two pH sensitive regions;   wherein:   a first pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external sample solution;   a second pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external buffer solution;   the separating element, the first pH sensitive region, and the second pH sensitive region establish a charge flow circuit through the internal buffer solution, the external buffer solution, and the external sample solution; and   the charge flow circuit acts as a voltage divider for the first electrode and the second electrode of the electrode pairing of the low slope measuring electrode;   at least one other measuring electrode; and   a processor configured to utilize signals derived from the low slope measuring electrode and the at least one other measuring electrode device to produce a pH measurement output.   
     
     
         10 . The system of  claim 9 , wherein the at least one other measuring electrode has a pH sensitivity of about 59 mV/pH unit. 
     
     
         11 . The system of  claim 10 , wherein the electrode pairing of the low slope measuring electrode has a pH sensitivity of about ½ the sensitivity of the at least one other measuring electrode. 
     
     
         12 . The system of  claim 11 , wherein the at least one other measuring electrode comprises two measuring electrodes each having a pH sensitivity of about 59 mV/pH unit. 
     
     
         13 . The system of  claim 12 , wherein:
 one of the two measuring electrodes comprises a fill buffer of about pH 4; and   another of the two measuring electrodes comprises a fill buffer of about pH 7.   
     
     
         14 . The system of  claim 13 , wherein the two measuring electrodes act as a measuring pair. 
     
     
         15 . A low slope electrode device, comprising:
 a low slope measuring electrode for placement in an external sample solution, said low slope measuring electrode comprising:
 an electrode disposed within a glass container including an internal buffer solution and at least partially enclosing the electrode of the low slope measuring electrode, the glass container having two pH sensitive regions; 
 an external buffer container including an external buffer solution and at least partially enclosing one of the two pH sensitive regions; and 
   a separating element that separates the two pH sensitive regions;   wherein:   a first pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external sample solution;   a second pH sensitive region of the glass container permits charge flow between the internal buffer solution and the external buffer solution;   the separating element, the first pH sensitive region, and the second pH sensitive region establish a charge flow circuit through the internal buffer solution, the external buffer solution, and the external sample solution; and   the charge flow circuit acts as a voltage divider for the low slope measuring electrode.