초록 ▼

A calibration method and apparatus for use in measuring the concentrations of components of a fluid is provided. The measurements are determined from the intensity of radiation over a selected range of radiation wavelengths using peak-to-trough calculations. The peak-to-trough calculations are simpl

A calibration method and apparatus for use in measuring the concentrations of components of a fluid is provided. The measurements are determined from the intensity of radiation over a selected range of radiation wavelengths using peak-to-trough calculations. The peak-to-trough calculations are simplified by compensating for radiation absorption by the apparatus. The invention also allows absorption characteristics of an interfering fluid component to be accurately determined and negated thereby facilitating analysis of the fluid.

대표청구항 ▼

A method for substantially negating a measured effect of an interfering component of a sample fluid, comprising the steps of: (a) introducing said interfering component into a chamber; (b) passing radiation through said chamber; (c) flowing into said chamber a diluting fluid; (d) measuring the amoun

A method for substantially negating a measured effect of an interfering component of a sample fluid, comprising the steps of: (a) introducing said interfering component into a chamber; (b) passing radiation through said chamber; (c) flowing into said chamber a diluting fluid; (d) measuring the amount of radiation which passes through said component at a plurality of points in a first wavelength range, wherein said interfering component and at least one other component of the sample fluid to be measured absorb radiation, and at a plurality of points in a second wavelength range, wherein substantially only said interfering component absorbs radiation, at a plurality of times as said component is progressively diluted; (e) measuring the amount of radiation which passes through said sample fluid at a plurality of points in said first range and at a plurality of points in said second range; (f) matching said measured amounts of radiation which pass through said sample fluid in said second range to amounts determined from said measured amounts of radiation which pass through said interfering component in said second range; and (g) determining, responsive to said step of matching, a difference between corresponding measured amounts of radiation which pass through said sample fluid in said first range and determined amounts of radiation which pass through said interfering component in said first range.