METHOD TO PRECISELY DETERMINE CHEMICAL SUBSTANCE CONTAINED IN SAMPLE SOLUTION AT EXTREMELY LOW DENSITY OF 1×10-8M OR LESS

摘要

PROBLEM TO BE SOLVED: To provide a method to precisely determine chemical substances contained in a sample solution at an extremely low density of 1×10^-8M or less.;SOLUTION: The method determines precisely chemical substances contained in a sample solution 16 at an extremely low density of 1×10^-8M or less by using a measurement system including: an antipole 13, a first reference electrode 12, a first working electrode 11a, a second working electrode 11b, a second reference electrode 14 and an electrode 15 covered with gel. The electrode 15 covered with gel is electrically equivalent to the second working electrode 11b. The electrode 15 covered with gel includes an electrode main body 31 and a gel 34. The gel 34 covers the surface of the electrode main body 31. The gel 34 contains reference electrolyte and ionic liquid but contains no water. The ionic liquid is hydrophobic and non-volatile. The ionic liquid includes cation and anion. The reference electrolyte includes the cation and halide ion.;COPYRIGHT: (C)2014,JPO&INPIT