Comparative Study of Elemental Nutrients in Organic and Conventional Vegetables Using Laser-Induced Breakdown...

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Agricultural Science

Background:

• Organic and conventional farming practices can influence the nutritional content of vegetables.
• Accurate elemental analysis is crucial for understanding vegetable quality and nutritional value.

Purpose of the Study:

• To compare the elemental composition of major nutrient elements in organic versus conventional cauliflower and broccoli using Laser-Induced Breakdown Spectroscopy (LIBS).
• To investigate the distribution and concentration of elements within different parts of these vegetables.

Main Methods:

• Utilized Laser-Induced Breakdown Spectroscopy (LIBS) for elemental analysis of cauliflower and broccoli samples.
• Acquired LIBS spectra at optimized laser energy, gate delay, and gate width.
• Performed univariate (elemental line intensity and ratios) and multivariate (Principal Component Analysis - PCA) analyses for data interpretation.

Main Results:

• LIBS successfully identified and quantified major nutrient elements in both organic and conventional vegetables.
• Significant differences in elemental profiles were observed between organic and conventional samples.
• Elemental distribution varied across different parts of the cauliflower and broccoli.

Conclusions:

• LIBS is a viable technique for differentiating organic and conventional vegetables based on their elemental composition.
• The study highlights potential nutritional variations influenced by agricultural practices.
• Further research can explore the impact of these elemental differences on overall vegetable quality.