English

Automated methods for background estimation in laser spectroscopy

1281
2023-11-24 14:35:28
See translation

A new automated method for spectral background estimation in laser spectroscopy ensures the accuracy of quantitative analysis with minimal human intervention.

When using laser-induced breakdown spectroscopy in spectral analysis, scientists may encounter various obstacles. The most common challenge faced by scientists when conducting elemental analysis is to optimize the interaction between the laser and the sample, pay attention to changes in laser energy, and the convergence of environmental noise, which helps to create different backgrounds in the collected spectra. All these obstacles will have a significant impact on the analysis.

In a recent study published in the Journal of Spectroscopy Part B: Atomic Spectroscopy, a research group from Jiangnan University introduced a new LIBS method aimed at automatically estimating and removing different spectral backgrounds. Under the leadership of Chen Hao from the School of Mechanical Engineering at Jiangnan University, researchers proposed a method that utilizes window functions, differential concepts, and piecewise cubic Hermite interpolation polynomials.

In this experiment, Chen and his team conducted a series of simulation experiments to evaluate background correction methods. They found that their proposed method performs better than existing techniques such as asymmetric least squares and modelless background correction. By utilizing window functions, Pchip, and differential concepts, the new method improves the ability to eliminate white noise and baseline distortion, achieving a better signal-to-noise ratio than previous methods.

The research team also found that their method improved the processing of background baseline jumps.
The researchers applied their method to seven different aluminum alloys and observed a correlation between spectral intensity and magnesium concentration.

It is worth noting that in the experiment of measuring magnesium concentration in aluminum alloys, the correlation coefficient between predicted concentration and actual concentration significantly improved after correction.

The coefficients for ALS and model free methods are 0.9913 and 0.9926, respectively, while the coefficients for this new method have decreased from the initial 0.9943 to 0.9154.

These findings not only validate the effectiveness of this automated method, but also pave the way for future research to improve the accuracy of LIBS spectral analysis.

Source: Laser Network

Related Recommendations
  • Shanghai Institute of Optics and Mechanics proposes a new scheme of Er doped silicate fiber as an extended L-band broadband amplifier

    Recently, Hu Lili, a research group of the Advanced Laser and Optoelectronic Functional Materials Department of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, proposed a new scheme based on field strength optimization of Er doped silicate fiber as an extended L-band broadband amplifier. Relevant research achievements were published in Optics Letters under the tit...

    2024-06-05
    See translation
  • Multinational research team achieves breakthrough in diamond Raman laser oscillator

    Recently, the team led by Professor Lv Zhiwei and Professor Bai Zhenxu from Hebei University of Technology, in collaboration with Professor Richard Mildren from Macquarie University in Australia and Professor Takashige Omatsu from Chiba University in Japan, successfully achieved direct output of Raman vortex optical rotation with large wavelength extension in a diamond Raman laser oscillator. This...

    02-27
    See translation
  • Laser-induced graphene sensor can diagnose diabetes through breath samples

    In the U.S., one in five of the 37 million adults who has diabetes is not aware of it (according to the U.S. CDC – Centers for Disease Control & Prevention). Current methods of diagnosing diabetes and prediabetes usually require a visit to a doctor’s office or lab work, both of which can be expensive and time-consuming. Now, diagnosing diabetes and prediabetes may be as simple as breathing. ...

    09-08
    See translation
  • Seyond plans to land on the Hong Kong Stock Exchange in De SPAC mode

    Recently, TechStar Acquisition Corporation (07855. HK), a special purpose acquisition company, announced that Seyond, the successor company of the special purpose acquisition transaction, has submitted a new listing application. Seyond plans to land on the Hong Kong Stock Exchange under the De SPAC model. This means that Seyond is only one step away from going public through a backdoor listing. If...

    02-14
    See translation
  • Application of Airborne Lidar Calibration Board in Various Fields

    With the rapid development of technology, airborne LiDAR technology has become one of the key technologies in modern surveying, remote sensing, navigation and other fields. As an important component of this technology, the airborne LiDAR calibration board plays a crucial role in ensuring the accuracy and stability of the radar system. This article will explore the application and importance of air...

    2024-04-08
    See translation