This is an excellent video.(There are a lot of poor videos on RU-vid!) I use it in an instrumental analysis course to introduce students to how an AA spectrometer works.
Hi Dawson, The term “slit width” refers to the physical width of the opening used to pass a narrow portion of the spectrum of light to be used in the experiment. The light from the lamp is dispersed by a grating into a rainbow across a wall inside the box that houses the monochromator. The opening in the wall (called the slit) allows only a narrow band (a small range of wavelengths) to pass out of the monochromator and on to the detector. In some contexts, slit width may also refer to the range of wavelengths (usually in nanometers for visible light) that pass through the monochromator (that is, through the physical slit). More often this wavelength range is called the "spectral bandpass". The narrower the slit width the better job the monochromator does in isolating the wavelength for the atomic absorption transition. However, beyond a certain point decreasing the slit width is detrimental because it weakens the signal intensity and, consequently, poorer sensitivity.
@@yacoubasanogo3219 A specific HCL has to be used for the element to be determined. That is, you have to know what you're looking for. There are single- and multi-element HCLs, though the latter is typically for only 2 to 3 elements..
