How do you dispose of hollow cathode lamps?
Lamps are classified as “WEEE” as they contain some electronics and some small quantities of chemicals – therefore, they should not be placed in the normal household waste. This is indicated by the (familiar) crossed out bin logo (which also aims to remind users not to dispose of in domestic garbage).
What is one disadvantage of a hollow cathode lamp?
The only disadvantage of such lamps is that the useful life of some elements can get shortened as higher current can be passed but this single disadvantage far outweighs the advantages over conventional lamps.
What material is the cathode in hollow cathode lamp?
Hollow cathode lamps (HCL) are discharge lamps designed for use in Atomic Absorption (AA) instruments. They consist of a cathode made from the element of interest, an anode and an inert filler gas contained in a glass envelope.
Is field inside the hollow cathode lamp?
SPECTROSCOPY | Atomic Emission and Absorption Hollow-cathode lamps contain a cathode of the analyte element and an anode, and are filled with a noble gas. The other type of lamps are electrodeless discharge lamps that contain the element in a small quartz tube filled with a noble gas. A high-frequency field (c.
What is EDL in AAS?
Electrodeless Discharge Lamps (EDLs) are designed to be physically interchangeable with Lumina Hollow Cathode Lamps and their power supplies are built into all PinAAcle series of atomic absorption spectrometers.
What is the primary advantage of a hollow cathode lamp?
Advantages of Hollow Cathode Lamps [Why HCL in AAS?] Substantially Low Price. Variety of single- and multi-element coded / non-coded in low and high-current, 37 mm and 50 mm lamps. Long life due to higher gas volume. Clear signals and low distortion due to special cathode technology.
What is the role of a hollow cathode lamp HCL?
A hollow-cathode lamp (HCL) is type of cold cathode lamp used in physics and chemistry as a spectral line source (e.g. for atomic absorption spectrometers) and as a frequency tuner for light sources such as lasers. As these excited atoms decay to lower states, they will emit photons.
Why are hollow cathode lamps used in AAS?
Hollow Cathode Lamps are ideal source of spectral lines that are used for testing in laboratories. Basically Hollow Cathode Effect is electrical conduction at lower voltage. Apart from HCLs, Hollow Cathode Effect gets used in neon signages as well.
What type of result can AAS produce?
In clinical analysis, AAS can test for metals in whole blood, plasma, urine, saliva, brain and muscle tissue, the liver and hair. One example where atomic absorption spectroscopy can provide invaluable support is in measuring mercury levels in fish.
What is hollow cathode discharge?
A hollow cathode discharge may be used as a reservoir of sputtered atoms for spectroscopic investigations. The negative glow from the opposite walls of the inner surface of hollow cathode merge to produce a high density of neutral and excited atoms as well as of ions at the center of the hollow cathode.
Which lamp is used in fluorescence?
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.
Which is the correct order of AAS?
The standard AAS instrument consists of four components: the sample introduction area, the light (radiation) source, the monochromator or polychromator, and the detector (figure 1). Figure 1. The basic components of an AAS system.
Why do we use PerkinElmer for hollow cathode lamps?
Every genuine PerkinElmer lamp is designed for use with and tested on PerkinElmer spectrometers to assure compatibility and the highest performance. To prolong the life of a Lumina Hollow Cathode Lamp (HCL), we produce lamps with larger internal volume so that a greater supply of fill gas at optimum pressure is available.
How to prolong the life of a Lumina hollow cathode lamp?
To prolong the life of a Lumina ™ Hollow Cathode Lamp (HCL), we produce lamps with larger internal volume so that a greater supply of fill gas at optimum pressure is available. The larger the lamp, the greater the inert gas volume – and the longer the lamp lifetime.
Can A PerkinElmer be used on a HCl?
Every genuine PerkinElmer lamp is designed for use with and tested on our spectrometers to assure compatibility and the highest performance. We offer a wide range of single-element and multi-element HCLs, which are ideal for determining most elements by atomic absorption spectroscopy.
Can a Lumina hollow cathode be used with an AA spectrometer?
The larger the lamp, the greater the inert gas volume – and the longer the lamp lifetime. Note: Lumina ™ Hollow Cathode Lamps may also be used with all earlier AA spectrometers that do not have automatic code reading capability by using an appropriate adapter cable.