The graph shows SERS spectrum of 50ppm Paraquat also known as Methyl Viologen. This salt is one of the most widely used herbicides.
Laser wavelength: 633 nm
Laser power: 0.15mW
Integration time: 0.1 seconds
Raman Spectrometer: Raman Portable Device
Lens magnification: 50x
Sampling method: immersion
The substrate used: S-Silver (interchangeably, you can use one of our substrates)