Citric Acid

Citric acid is a weak organic acid that has the molecular formula C6H8O7. It occurs naturally in citrus fruits. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in the metabolism of all aerobic organisms. [Wikipedia]

The graph shows the SERS spectrum of 10^-3 M aqueous solution of citric acid on S-Silver hydrophilic substrate.

Laser wavelength: 785 nm
Laser power: 20 mW
Integration time: 4 seconds
Raman Spectrometer: B&WTEK
Lens magnification: 50x
Sampling method: immersion
The substrate used: S-Silver hydrophilic (interchangeably, you can use one of our substrates)