TOC Measurement Acid Addition Check via Conductivity Change
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Solution Overview
Problem
Existing total organic carbon (TOC) measurement methods struggle to confirm whether an acid has been properly added to the sample, leading to potential measurement inaccuracies due to the small amount of acid used, which is difficult to verify.
Innovation Solution
A method and device that measure conductivity changes in the sample before and after acid addition, using a conductivity cell and controller to determine if the acid has been introduced correctly by comparing conductivity differences with a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a small amount of acid is added to the sample to convert IC into carbon dioxide, then the TOC measurement can be performed, but it becomes difficult to confirm whether the acid has been added normally
Solution Approach 1:
The patent uses conductivity measurement as an intermediary indicator to detect acid addition. Instead of directly detecting the acid itself, the system measures the electrical conductivity of the sample before and after acid addition. The change in conductivity serves as a mediator that indicates whether the acid has been properly added, solving the problem of difficult direct detection.
Solution Approach 2:
The system implements feedback by measuring conductivity after acid addition and comparing it with the conductivity before addition. This feedback mechanism allows the system to confirm whether the acid has been added normally by detecting the expected change in conductivity, enabling verification of the acid addition process.
2Productivity
If acid addition is not verified, then the measurement process can proceed quickly, but measurement accuracy may be compromised
Solution Approach 1:
The patent applies preliminary action by measuring the conductivity of the sample before acid addition and establishing a baseline. This preliminary measurement enables subsequent verification of acid addition without significantly delaying the overall measurement process, as the conductivity check is performed rapidly as part of the standard procedure.
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
Enables accurate determination of acid addition to the sample, ensuring reliable TOC measurement by detecting conductivity changes, thereby preventing measurement errors.
Implementation Method 1
the conductivity of the sample is measured after the introduction of the acid into the sample
Data Source
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AI summary
Provided are a total organic carbon measurement method and a total organic carbon measurement device capable of determining whether or not an acid has been added to a sample. An acid is introduced into a reaction unit in which the sample is placed from a reservoir in which the acid is reserved (step S103). The conductivity of the sample into which the acid has been introduced is measured (step S105). The introduction of the acid from the reservoir into the reaction unit is detected on the basis of a change in the conductivity of the sample (step S107).