Sold out
Roll over or click image to zoom in
Portable differential Raman spectrometer SERDS
$0.00
customers are viewing this product
Main feature
⬤ The dual-light-source differential technology can automatically identify the differential characteristic
⬤ signals of Raman spectra and effectively filter out interfering peaks (such as environmental light peaks and PL peaks) to retain the pure Raman peaks.
⬤ Using dual laser co-optical path technology greatly simplifies the operational difficulty.
⬤ Greatly improve the overall detection sensitivity and signal-to-noise ratio of the system to capture small signal differences.
⬤ The technique of transmitting light direction collection can realize the direct detection of.
Technical index
|
Center wavelength of light source
|
Wave length1:(784.5±0.5)nm Wave length 2:(785.5±0.5)nm
|
|
Linewidth of light source
|
＜0.05nm
|
|
Spectral range (wave number)
|
(80-3600) cm⁻¹
|
|
Signal-to-noise ratio
|
≥950 ：1
|
|
Full band maximum resolution
|
＜5cm⁻¹
|
|
Communication interface
|
Wifi USB Bluetooth
|
|
Power source
|
Rechargeable lithium battery, lasting 6 hours
|
|
result
|
Provide test results, spectrum analysis, photo forensics and other storage forms, and support export
|
Differential Raman principle
The shifted differential Raman spectroscopy (SERDS) utilizes the unique frequency-shifting property of Raman spectroscopy, which is different from traditional Raman that only uses one laser source. Instead, it employs two light sources with very similar wavelengths to illuminate the sample, resulting in minimal changes in fluorescence and noise signals. As the Raman spectral feature peaks appear at positions that are fixed relative to the excitation light source's spectrum, the Raman feature peaks will move when the excitation light frequency is shifted. By subtracting the common parts in a differential manner, it is possible to accurately subtract fluorescence and noise, thus leaving behind a pure Raman spectral signal. This makes differential Raman technology not only effective in measuring high fluo rescent substances, but also capable of accurately restoring Raman signals from substances with weak Raman signals.
Raman spectroscopy and fluorescence interference
In the test of high fluorescence samples, the fluorescence interference is easy to cause the Raman signal to be masked Common fluorescent substances: aromatic hydrocarbon substances, high fluorescent drugs, drug excipients doping, biological samples, colored samples, fuel oil products, etc.
High fluorescent drug detection
The main component of the drug itself has high fluorescence properties of drugs, such as heroin,
fentanyl, barbiturates, etc.
High fluorescence caused by drug excipients, color and other factors, such as ecstasy, hemp, etc.
Application example: Detection of seized heroin samples
The concentration of heroin in 160 samples was quantified by standard method GB/T 29635-2013, and its concentration ranged from 5% to 89%. The seized samples contained phenacetin, dihydropropylline, theophylline, paracetamol, piracetam, nicotinamide, caffeine and
other excipients.
Top: Common Raman spectrum
Medium:OrdinaryRamanspectrafor baselineprocessing
Medium:OrdinaryRamanspectrafor baselineprocessing
Bottom:DifferentialRamanspectrum
Heroin standard
Seized Heroin samples (52% concentration)
⬤ Heroin qualitative detection recognition rate up to 95%! (The recognition rate of ordinary Raman detec-tion is less than 25%)
⬤ The high fluorescence interference was overcome effectively and the Raman characteristic peak of heroin was restored
⬤ Optimize the signal-to-noise ratio, improve the detection sensitivity, and avoid the interference of packaging materials
⬤ In addition to the effective identification of heroin components, it can also effectively identify the
⬤ types of supplementary materials, and further improve the recognition rate through the identification of supplementary materials
Application scenario:Security department,anti-drug,customs,postal,biomedicine,university research,jewelry archaeology, etc