Aerosol LIBS Brine Sampling for Accurate Lithium Detection
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Solution Overview
Problem
Laboratory tests for determining lithium concentration in lithium brine are costly and time-consuming, and direct laser-induced breakdown spectroscopy (LIBS) analysis of liquid brine samples leads to splashing and bubble formation, reducing data quality and increasing test duration.
Innovation Solution
Generating an aerosol stream of the brine sample and directing a laser beam at the stream to create a plasma, which is analyzed to accurately detect lithium concentration using a handheld LIBS device, allowing higher laser pulse frequencies and improved data reproducibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a handheld LIBS analyzer is used to directly test a liquid brine sample, then the concentration detection can be performed on-site, but the plasma causes splashing and bubbles that dirty the analyzer optical components and reduce data quality
Solution Approach 1:
An aerosol generation system is introduced as an intermediary between the liquid brine sample and the LIBS analyzer. The system nebulizes the liquid sample into an aerosol stream, which then serves as the target for laser irradiation. This intermediary transformation eliminates direct contact between the liquid and analyzer optics, preventing contamination while maintaining on-site detection capability
Solution Approach 2:
The physical state of the sample is changed from liquid to aerosol (suspension of liquid droplets in gas). This parameter change allows the sample to be analyzed by LIBS without the harmful effects of liquid splashing and bubble formation, thereby improving measurement precision while preserving portability
2Ease of operation
If direct LIBS analysis of liquid brine is performed, then on-site testing is enabled, but bubble formation reduces laser pulse frequency to less than 10 Hz resulting in poor data quality
Solution Approach 1:
The aerosol generation system acts as a mediator that transforms liquid brine into a gas-phase aerosol stream. This intermediary form eliminates bubble formation issues that limit laser pulse frequency in direct liquid analysis, enabling higher productivity while maintaining the portable on-site testing capability
Solution Approach 2:
The aerosol generation system operates continuously to provide a steady stream of nebulized sample, allowing periodic laser pulses at higher frequencies (e.g., 10-20 Hz or higher) to be delivered without the bubble interference that plagues direct liquid analysis. This periodic action at optimized frequency intervals improves data collection efficiency
3Measurement precision
If laboratory-based inductively coupled plasma testing is used, then accurate lithium concentration measurement is achieved, but the process is costly and time-consuming
Solution Approach 1:
The complex mechanical and thermal system of inductively coupled plasma in laboratory settings is replaced with a simpler, portable laser-induced breakdown spectroscopy system. The handheld LIBS analyzer uses pulsed laser ablation followed by spectral analysis, eliminating the need for complex plasma generation equipment while achieving comparable measurement accuracy for lithium concentration
Solution Approach 2:
The aerosol generation system performs preliminary sample preparation by nebulizing the liquid brine into a fine aerosol stream directly at the measurement site. This preliminary action eliminates the need for complex laboratory sample preparation steps, enabling rapid on-site analysis that is both accurate and time-efficient
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
The method enables rapid, accurate, and cost-effective on-site detection of lithium and other elements in brines, reducing contamination of the analyzer optics and enabling faster data collection with improved accuracy.
Implementation Method 1
an aerosol generator is used to generate an aerosol stream of the sampled brine
Implementation Method 2
direct laser-induced breakdown spectroscopy (LIBS) analysis of liquid brine samples leads to splashing and bubble formation
Implementation Method 3
directing a laser beam at the stream to create a plasma
Data Source
AI summary
A method of and system for detecting the concentration of a target element in a brine wherein the brine is sampled into a container and an aerosol generator is used to generate an aerosol stream of the sampled brine in the container. The aerosol stream may be directed to a collection system. A handheld LIB S device directs a laser beam to the aerosol stream at a location between the aerosol generator and the collection system to generate a plasma. The plasma is analyzed to detect intensity data for a reference element based on the generated plasma and to detect the intensity data of a target element based on the generated plasma. The concentration of the target element in the brine is calculated based on the reference element intensity data and the target element intensity data.