What makes the Corona detector unique – charged aerosol detection technology. CAD™ (Charged Aerosol Detection) is a unique technology, in which the HPLC column eluent is first nebulized with nitrogen, and the resulting mobile phase droplets are dried to remove mobile phase, which produces analyte particles.
How does a CAD detector work?
Featured CAD whiteboard videos The detector converts the analyte molecules into dry particles. A stream of positively charged gas collides with the analyte particles. The charge is then transferred to the particles—the larger the particles, the greater the charge.
What is the use of CAD detector?
The Charged Aerosol Detector (CAD) is a detector used in conjunction with high-performance liquid chromatography (HPLC) and ultra high-performance liquid chromatography (UHPLC) to measure the amount of chemicals in a sample by creating charged aerosol particles which are detected using an electrometer.
What is Corona CAD?
The Corona® CAD® is an HPLC detector that delivers near universal detection and quantitation. Charged aerosol detection is a non- optical detection technology for HPLC derived from proven particle characterization techniques.
Which is universal detector?
A universal detector is defined as the one which ‘can respond to every component in the column effluent except the mobile phase’2. In contrast, selective detectors are defined as ‘detectors which respond to a related group of sample components in the column effluent’.
Which detector is called as universal detector?
RID is sometimes described as “universal” because it only uses one basic physical property for detection (Refractive index) while other detection systems actually rely on multiple properties and/or conditions.
What is Dad detector?
Diode-Array Detection (DAD) or Photodiode-Array Detection (PDA) is an analytical technique that can be used to determine the purity of an analyte or related impurity peak eluting during an HPLC separation. The diode array detector uses the same principles of operation as a variable wavelength detector (VWD).
What is a PDA detector?
What does HPLC stand for?
High-performance liquid chromatography
High-performance liquid chromatography (or high-pressure liquid chromatography, HPLC) is a chromatographic technique that can separate a mixture of compounds and is used in biochemistry and analytical chemistry to identify, quantify and purify the individual components of the mixture.
What is the difference between DAD and VWD detectors?
it looks very similar. is the difference that on a DAD the signal from the lamp goes first thru a prisma and then thru the sample. On the VWD first passes the sample and then the prisma. I know the main benefit is on the DAD that you can record a full spectrum of a single peak.
