What is the principle of colorimeter?

Answer 1

Beer and Lambert's law states that 'when a ray of monochromatic light passes through a solution in a transparent vessel, intensity of transmitted light depends on concentration of absorbing solution and path length of absorbing medium.'

A=ebc

Where A is absorbance (no units, since A = log10P0 / P )

e is the molar absorbtivity with units of L mol-1 cm-1

b is the path length of the sample - that is, the path length of the cuvette in which the sample is contained. We will express this measurement in centimetres.

c is the concentration of the compound in solution, expressed in mol L-1

when path length is kept constant ansorbance is proportional to concentration of substance. Path length for a colorimeter is constant.

Different substances absorb light of different frequencies maximally. Light of appropriate frequency is passed through solution using different filters in colorimeter and % transmission is measured. e.g. proteins absorb light of 650nm.

Error is eliminated by calliberatin blank(solution without test substance) as 100% transmission ie zero absorbance, and black stop as 0% transmission. Thus we get absorbance of only required substance.

% transmission is converted to absorbance using following expression

A = 2 - log10 %T

Answer 2

A spectrophotometer is used to measure the amount of light a sample (be it liquid or solid) absorbs. Light is passed through the sample and a detector measures the intensity of that light that passes through the sample and hits that detector.

The beam of light consists of photons, and when these photons encounter an analyte molecule (an analyte being the molecule that is under study), there's a chance that this analyte will absorb the photon. This absorption consequently reduces the number of photons in the light beam and thus reduces the intensity of that light beam.

See related link below for a demo.

Answer 3

Oh, dude, the principle of a colorimeter is basically to measure the absorbance of a specific wavelength of light by a solution. It's like a fancy way of saying it tells you how much light a solution soaks up. So, if you wanna know how concentrated a solution is or how much of a particular substance is in there, you use a colorimeter to figure it out.

Answer 4

Ah, colorimeter, fancy term for a device that measures the absorbance of particular wavelengths of light by a specific solution. Basically, it helps determine the concentration of a substance in a solution by analyzing the color it produces. It's like a detective for colors, solving the mystery of concentration levels.

Answer 5

Well, a colorimeter is a tool that measures the absorbance of different colors in a solution. It helps us understand the concentration of a particular substance in a solution based on how much light it absorbs. Just like when we mix colors on our palette to create beautiful paintings, scientists use colorimeters to mix and measure colors in solutions for various purposes. It's all about understanding and appreciating the way colors interact with light to reveal important information.

Answer 6

A colorimeter is a device used to quantitatively determine the concentration of a substance in a solution by measuring the absorbance or transmittance of light of a specific wavelength. The principle behind a colorimeter is based on Beer-Lambert's Law, which states that the absorbance of a substance is directly proportional to its concentration and the path length of the light through the solution. By measuring the absorbance of a sample and comparing it to a standard curve, the concentration of the substance can be accurately determined using a colorimeter.

Answer 7

A colorimeter measures the absorbance of specific wavelengths of light by a sample to determine its color. It compares this absorbance to a standard to quantify the color of the sample, typically in terms of concentration or purity of a substance. By analyzing the amount of light absorbed or transmitted by the sample, a colorimeter provides information about the sample's color properties.

Answer 8

The science of measuring colours and assigning them numeric values; Analysis involving the quantitative measurement of colour and is done especially by big Dave McC

Answer 9

This is an analytical technique which depends on the measurement of colour intensity of solutions.

Answer 10

coiorimetry is an analytical procedure whichdeals with the abrorption of radiation