Electrochemical detection of silica species
First Claim
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1. A method comprising:
- applying a voltage to a buffering solution, which comprises a molybdenum-chloranilate complex and is free of inorganic silica species;
measuring a first current associated with the molybdenum-chloranilate complex in absence of the inorganic silica species;
adding the inorganic silica species into the buffering solution;
measuring a second current associated with the molybdenum-chloranilate complex in the presence of the added inorganic silica species; and
obtaining a difference between the first current and the second current to identify a concentration of the added inorganic silica species in the buffering solution,wherein measuring the first and second currents comprises using a working electrode comprising bismuth.
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Abstract
A systems and apparatus for measuring non-electroactive materials in liquids using electrochemical detection. A first electrical activity of a electroactive material is detected in absence of a target non-electroactive material (Step 120). A second electrical activity of the electroactive material is detected in presence of the target non-electroactive material (Step 130). A difference between the first and second electrical activities is obtained, and based on the obtained difference, a concentration of the target non-electroactive material is identified (Step 140).
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Citations
19 Claims
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1. A method comprising:
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applying a voltage to a buffering solution, which comprises a molybdenum-chloranilate complex and is free of inorganic silica species; measuring a first current associated with the molybdenum-chloranilate complex in absence of the inorganic silica species; adding the inorganic silica species into the buffering solution; measuring a second current associated with the molybdenum-chloranilate complex in the presence of the added inorganic silica species; and obtaining a difference between the first current and the second current to identify a concentration of the added inorganic silica species in the buffering solution, wherein measuring the first and second currents comprises using a working electrode comprising bismuth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for measuring non-electroactive materials in liquids, the apparatus comprising:
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A. a detection device comprising i. a container configured to at least partially hold a buffering solution in the container, the buffering solution comprising a molybdenum-chloranilate complex; and ii. an electrically conductive member comprising bismuth at least partially submerged in the buffering solution, wherein the container, the buffering solution and the electrically conductive member are configured to measure a first current corresponding to the molybdenum-chloranilate complex in the absence of an inorganic silica species and a second current corresponding to the molybdenum-chloranilate complex in the presence of the inorganic silica species; and B. a data processing device configured to receive the measured first and second currents from the detection device and to obtain a difference between the first current and the second current to identify a concentration of the inorganic silica species. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An apparatus for measuring inorganic silica species in a liquid stream or sample using electrochemical detection, the apparatus comprising:
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a flow-through detection device configured to continuously detect an inorganic silica species in a liquid stream or sample; and a data processing device, wherein the flow-through detection device comprises; i. a container having an inlet port and an outlet port, the inlet port configured to receive a liquid stream or sample comprising a buffering solution and a molybdenum-chloranilate complex that will flow through the device; and ii. a bismuth-based electrode at least partially submerged in the buffering solution, wherein the container, the buffering solution, and the bismuth-based electrode are configured to measure a first current corresponding to the molybdenum-chloranilate complex in the absence of an inorganic silica species and a second current corresponding to the molybdenum-chloranilate complex in the presence of the inorganic silica species, and wherein the data processing device is configured to receive the measured first and second currents from the detection device and to obtain a difference between the first current and the second current to identify a concentration of the inorganic silica species. - View Dependent Claims (18, 19)
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Specification