Patent ID: 8748191
Filing Date: 2014-06-10
Classification: G01N,Y10T

Abstract:
1. A stop-flow analytical system, comprising: a sample pump coupled with a sample input port that allows the sample pump to be coupled to a working source of a use composition having concentrations of one or more substances; a first reagent pump coupled with a first reagent input port that allows the first reagent pump to be coupled with a source of a first reagent; a diluent pump coupled with a diluent input port that allows the diluent pump to be coupled with a source of a diluent; a pre-mixer coupled to the sample pump and the diluent pump, the pre-mixer configured to mix together a finite sample of the use composition delivered by the sample pump and a finite volume of the diluent delivered by the diluent pump, resulting in a diluted sample; a mixer coupled to the first reagent pump and the pre-mixer, the mixer configured to mix together a finite volume of the first reagent delivered by the first reagent pump and the diluted sample received from the pre-mixer, resulting in a sample mixture; an optical sensor coupled to the mixer, the optical sensor comprising an optical cell that receives the sample mixture from the mixer, the optical sensor configured to obtain response data from the sample mixture indicative of the concentrations of the one or more substances within the use composition; a stop-flow mechanism coupled to the optical sensor and configured to stop the flow of the sample mixture while the sample mixture is within the optical cell of the optical sensor; and a rinse bypass line coupling the diluent input port to the mixer while bypassing the pre-mixer.