Single Reagent Mixture for Total Organic Carbon Analysis
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Solution Overview
Problem
Current UV/Persulfate Total Organic Carbon (TOC) analyzers require separate steps and reagents, leading to complex workflows and high reagent costs due to the need for multiple reagents, including acids and oxidants, which are expensive and difficult to handle.
Innovation Solution
Combining all reagents into a single, inexpensive reagent mixture that includes an acid and an oxidizer, allowing for simultaneous acidification and oxidation of carbon in a UV/Persulfate analysis, simplifying the measurement process and reducing reagent workflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate reagents (acid and oxidant) are used in current UV/Persulfate TOC analyzers, then the oxidation of organic carbon can be achieved, but the reagent workflow becomes complex and reagent costs increase
Solution Approach 1:
The patent combines separate acid and oxidant reagents into a single integrated reagent solution. This single reagent performs both acidification (to remove inorganic carbon) and oxidation (to convert organic carbon to CO2) functions, eliminating the need for separate reagent handling steps and reducing workflow complexity while maintaining measurement reliability
2Measurement precision
If multiple reagents are used for TOC analysis, then complete carbon conversion can be achieved, but reagent handling difficulty and costs increase
Solution Approach 1:
The invention merges multiple reagent functions into one solution that can be easily handled and dispensed. The single reagent contains both acidifying and oxidizing components, allowing complete carbon conversion (both inorganic and organic) to be achieved through a simplified handling process that reduces user burden and operational complexity
3Measurement precision
If separate acid and oxidant reagents are used, then inorganic and organic carbon can be separately processed, but the analysis steps become numerous and time-consuming
Solution Approach 1:
The patent combines separate processing steps for inorganic and organic carbon into a single integrated analysis step using one reagent. The reagent simultaneously acidifies to release inorganic carbon as CO2 and oxidizes organic carbon to CO2, allowing both carbon types to be processed concurrently rather than sequentially, thereby improving analysis speed while maintaining precision
Solution Approach 2:
The single reagent enables continuous action where acidification and oxidation occur simultaneously in one step rather than requiring sequential separate steps. This continuous processing eliminates idle time between reagent additions and processing steps, increasing overall productivity while maintaining the precision needed to differentiate and measure both inorganic and organic carbon
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces reagent costs and simplifies the measurement process by allowing all reagents to be combined into a single solution, streamlining the analysis and providing accurate TOC measurements with a single blank subtraction, thereby enhancing operational efficiency and reducing handling complexities.
Implementation Method 1
An acid reagent is first added to react with the inorganic carbon compound in the sample to generate CO2
Implementation Method 2
A chemical oxidant is then added to oxidize the organic carbon present in the sample to CO2, generally with the aid of ultraviolet radiation
Data Source
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AI summary
A method for determining the total organic carbon in a sample (22) which includes mixing the sample with a reagent (32) containing at least one acid effective for reacting with inorganic carbon-containing materials in the sample, and at least one oxidizing agent effective for oxidizing organic carbon-containing materials in the sample in the presence of ultraviolet radiation, and detecting the carbon dioxide generated, is described. The at least one acid may include phosphoric acid, while the oxidizing agent may include sodium persulfate. The sample is first injected into a reaction chamber (16), which is continuously flushed with carbon dioxide free gas with no UV light present, and CO2 generated from any inorganic carbon in the sample as carbonates is flowed through the detector, and may be recorded. Subsequent to this step, UV light is passed through the reaction chamber and CO2 generated from the reaction of the at least one oxidizing agent with the organic material in the solution in the presence of ultraviolet radiation, is flowed through the detector (20), after the reaction chamber is sparged using a carbon dioxide free gas, and recorded.