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US 12,480,928 B2Granted
Total organic carbon measurement method and total organic carbon measurement device
AssigneeShimadzu Corporation
InventorsMasahito Yahata, Yoshiaki Nieda
Life of this patent
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Abstract
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).
Claims8
A total organic-carbon measurement method comprising:
- introducing an acid from a reservoir in which the acid is reserved into a reaction unit in which a sample is placed;
- measuring conductivity of the sample before the acid is introduced:
- measuring conductivity of the sample into which the acid is introduced;
- calculating a difference in the conductivity of the sample before and after the introduction of the acid;
- detecting the introduction of the acid from the reservoir into the reaction unit on a basis of the difference in the conductivity of the sample;
- and
- combusting the sample after the introduction of the acid and after aeration treatment, and measuring an amount of a generated carbon-based substance in a gas phase to obtain the total organic carbon in the sample.
4 more elements
A total organic carbon measurement comprising:
- introducing an acid from a reservoir in which the acid is reserved into a reaction unit in which a sample is placed;
- measuring conductivity of the sample before the acid is introduced;
- measuring conductivity of the sample into which the acid is introduced;
- calculating a difference in the conductivity of the sample before and after the introduction of the acid;
- detecting the introduction of the acid from the reservoir into the reaction unit on a basis of the difference in the conductivity of the sample;
- measuring an amount of total carbon contained in the sample by combusting the sample before the introduction of the acid and measuring an amount of a generated carbon-based substance in a gas phase;
- measuring an amount of a carbon-based substance in a gas phase generated by performing aeration treatment on the sample after the introduction of the acid;
- and
- subtracting the amount of the carbon-based substance in the gas phase after aeration treatment from the amount of the total carbon to obtain the total organic carbon in the sample.
6 more elements
A total organic-carbon measurement device, comprising:
- a reaction unit in which a sample is placed;
- an addition unit configured to introduce an acid into the reaction unit from a reservoir in which the acid is reserved;
- a first conductivity measurement unit that measures conductivity of the sample into which the acid is introduced;
- a second conductivity measurement unit that measures conductivity of the sample before the introduction of the acid;
- and an arithmetic unit that calculates a difference in the conductivity of the sample before and after the introduction of the acid;
- and
- a determination unit that determines the introduction of the acid from the reservoir into the reaction unit on a basis of the difference in the conductivity of the sample;
- and
- a carbon-based substance measurement unit that combusts the sample after the introduction of the acid and after aeration treatment, and measures an amount of a generated carbon-based substance in a gas phase to obtain the total organic carbon in the sample.
6 more elements
A total organic carbon measurement device, comprising:
- a reaction unit in which a sample is placed;
- an addition unit configured to introduce an acid into the reaction unit from a reservoir in which the acid is reserved;
- a first conductivity measurement unit that measures conductivity of the sample into which the acid is introduced;
- a second conductivity measurement unit that measures conductivity of the sample before the introduction of the acid;
- and
- an arithmetic unit that calculates a difference in the conductivity of the sample before and after the introduction of the acid;
- characterized in that the total organic carbon measurement device further comprises:
- a determination unit that determines the introduction of the acid from the reservoir into the reaction unit on a basis of the difference in the conductivity of the sample;
- a total carbon measurement unit that measures an amount of total carbon contained in the sample by combusting the sample before the introduction of the acid and measuring an amount of a generated carbon-based substance in a gas phase;
- and
- a carbon-based substance measurement unit that measures an amount of a carbon-based substance in a gas phase generated by performing aeration treatment on the sample after the introduction of the acid;
- wherein the arithmetic unit subtracts the amount of the carbon-based substance in the gas phase after aeration treatment from the amount of the total carbon to obtain the total organic carbon in the sample.
9 more elements
Dependencies are inferred from the claim text.