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How do you determine the composition of metamorphic grade of an amber?
Optical spectrophotomerty
Why is the line on the cuvette always aligned with that of the sampler holder?
This technique prevents scratching of the cuvette in those areas through which the light will pass. Scratches on the cuvette can lead to erroneous measurements.
What is e-value of a optical brightening agent?
e-value of an optical brightening agent is the absorbance value obtained (in the UV region), when the absorbance of 1% solution is measured using a cuvette of 1 cm path length. T.J.R.PILLAI
What is a cuvette and how is it used?
A cuvette is, basically, a glorified test tube for use in a spectrometer. They're sometimes square in cross section to avoid refraction artifacts. Depending on what part of the spectrum is under consideration, they may be made of quartz, though plastic and glass cuvettes do exist. You put a liquid sample into it then put the cuvette into the instrument. The beams inside of the instrument can 'see through' the quartz and 'read' your sample.
What is the relation of Beers Lambert's law in UV Visible spectrometer?
The Beer-Lambert law Absorbance = (extinction coefficent)(pathlength of light)(concentration) allows you to measure the absorbance of sample in a UV spec, and change the rate from absorbance units / time to change in concentration / time. the pathlength of light being the width of the cuvette and the extinctin coefficent being specific to the product molecule.
What are UV tapers for your ears?
They are just tapers that react to a black light. Kind of like UV paint that glows.
Identify the functions of each of the cuvettes Cuvette 1?
1: control, recalibirate spectrophotometer 2: photosynthesis does not occur without light 3: photosynthesis does occur with light and live chloroplasts 4: boiling chloroplasts=no photosynthesis 5. control
Why is quartz cuvette preferred in a spectrophotometer?
Plastic and glass both absorb UV light. There are modern plastics that are now transparent to UV so plastic has begun to replace expensive quartz cells in UV spectrometry. These curvettes (cells) are transparent to UV down to 220 nm and have the advantage of being cheap enough to throw away after use. These are now used by biologists when analysing DNA/RNA or proteins. I don't know what chemists use but they tend to be traditionlists so probably still use quartz which has the advantage of being unreactive to most chemicals they can throw at them.
Whats a little baby test tube called?
Cuvette
What happens if you use a 0.5cm cuvette in a 1cm cuvette spectrophotometer?
The absorption of sample at maximum wavelength will be reduced by1/2 . Vijay Bhoir (Flamingo pharmaceuticals Ltd.Rabale Navi Mumbai ).
What kind of cancer does UV rays cause?
it can cause skin cancer
What kind of rays does the sun have?
electromagnetic radiation, from radio through UV.
