ICP Spectrometer Spatial-Temporal Emission Tracking
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Solution Overview
Problem
Existing inductively coupled plasma spectrometric systems face challenges in accurately measuring the effects of a target sample due to difficulties in specifying sample positions and separating noise effects from contamination and gas components in the emission intensity distribution.
Innovation Solution
An inductively coupled plasma spectrometric system that includes a spectrometer to resolve light into wavelength components, a detection device to detect spatial light distribution, and a measuring device to capture this distribution at intervals shorter than the sample's passage time, allowing for precise measurement of the sample's emission state and separation of noise effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spectrophotometric analyzer detects spatial distribution of emission intensities in plasma, then the distribution of emission intensities at every position in the plasma can be obtained, but the positions of the target sample cannot be specified and noise effects from contamination and gas components cannot be removed
Solution Approach 1:
The plasma emission spectrum is segmented by wavelength, and the plasma region is segmented by spatial position. A two-dimensional detector array resolves the emission spectrum into wavelength components along one axis and spatial positions along the other axis, enabling simultaneous measurement of spectral distribution and spatial distribution. This segmentation allows identification of sample positions based on their characteristic emission spectra and spatial locations.
Solution Approach 2:
The detection system transitions from one-dimensional spatial detection to two-dimensional detection by adding the wavelength dimension. The two-dimensional detector array simultaneously captures spatial distribution and spectral information, creating a three-dimensional data space (x, y, λ) where (x, y) represents spatial position and λ represents wavelength. This dimensional expansion enables precise sample position identification through spectral-fingerprint matching.
2Productivity
If continuous monitoring of plasma emission is performed, then the overall emission state can be tracked, but the temporal resolution required to separate sample effects from background noise is insufficient
Solution Approach 1:
The two-dimensional detector array continuously monitors the plasma emission state without interruption, maintaining constant observation of the entire plasma region across all wavelengths simultaneously. This continuous action ensures no sample events are missed while efficiently utilizing the detector's full capability at every moment.
Solution Approach 2:
The system performs periodic sampling of the plasma emission state at time intervals short enough to capture transient sample effects. By acquiring spectra at regular, frequent intervals, the system resolves the temporal dynamics of sample introduction, vaporization, atomization, and emission, separating these rapid processes from the slower background plasma emission.
3Measurement precision
If the measurement time is longer than the sample passage time, then more signal can be accumulated, but the sample position changes during measurement making it impossible to extract pure sample effects
Solution Approach 1:
The system预先 identifies the sample's spatial trajectory and temporal progression through the plasma based on characteristic emission patterns. By tracking the sample's position as a function of time using the two-dimensional spectral-spatial data, the system can extract emission signals specifically from the sample's path, separating them from background plasma emission even when measurement duration exceeds sample passage time.
Solution Approach 2:
The system uses the detected spatial distribution of emission intensities as feedback to identify and track sample positions in real-time. This feedback mechanism allows dynamic adjustment of the analysis window to follow the sample through the plasma, continuously extracting pure sample emission signals from the total emission spectrum by spatially and temporally correlating with the sample's movement.
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 configuration enhances analytical accuracy by capturing both temporal and spatial changes in the plasma emission state, enabling better identification of elemental components and improving the separation of sample effects from noise.
Implementation Method 1
a spectrometer configured to resolve light emitted in a measurement region set in the plasma into a plurality of wavelength components
Implementation Method 2
a detection device configured to detect a spatial distribution of the resolved light
Implementation Method 3
an inductively coupled plasma (ICP) atomic emission spectrometer that uses plasma as an atomization source or an ionization source
Data Source
AI summary
Provided is an inductively coupled plasma spectrometric system for measuring an emission state of plasma into which a measurement target sample is fed, the inductively coupled plasma spectrometric system including: a spectrometer configured to resolve light emitted in a measurement region set in the plasma into a plurality of wavelength components; a detection device configured to detect a spatial distribution of the resolved light; and a measuring device configured to measure the detected spatial distribution at every measurement unit time, the measurement unit time being at least shorter than time required for the sample to pass through the measurement region.