Determination of analyte concentration, Physics

Assignment Help:

Determination of Analyte Concentration:

One of the most common applications of spectrophotometry is to determine the concentration of an analyte in a solution. There is a relationship between concentration and absorbance.  This relationship is expressed by the Lambert-Beer law, which is more commonly known as Beer's law.  This law states that the absorbance of a light absorbing material is proportional to its concentration in solution.

A = Ebc

E = the extinction coefficient of the substance, has units of M-i  * cm-i  (unique for each substance)

b = the sample path length measured in centemeters (i.e. the width of the cuvette-almost always i cm)

c = the molar concentration of the solution (you must express concentration in terms of molarity)

It is because of this relationship that biologists measure absorption rather than transmission. The Lambert-Beer law can be used to calculate the concentration of a solution if its extinction coefficient is known.  To determine the extinction coefficient, you measure the absorbance of a known concentration of solution and then rearrange the equation to solve for E.=

Table.  Visible Spectrum and Complementary Colors

1471_Determination of Analyte Concentration.png

 


Related Discussions:- Determination of analyte concentration

Nucleons together in a nucleus, What does held nucleons together in a nucle...

What does held nucleons together in a nucleus? Nuclear force. It is the nuclear force which fasten the nucleons together and is responsible for the stability of nucleus.

Free fall , wrench from the top of an 80 m high tower what is the velocity ...

wrench from the top of an 80 m high tower what is the velocity of the wrench when it strikes the ground?

Vector, I need some examples (at least 5 examples) of daily life applicatio...

I need some examples (at least 5 examples) of daily life application of vector. could you please help me? thankyou

Pascal, pascal; Pa The derived SI unit of pressure explained as 1 N wo...

pascal; Pa The derived SI unit of pressure explained as 1 N working over an area of 1 m 2 ; thus it has units of N/m 2

Faradays law, Faraday's law (M. Faraday): The line integral of the ele...

Faraday's law (M. Faraday): The line integral of the electric field about a closed curve is proportional to the instant time rate of change of the magnetic flux by a surface l

Calculate the total energy of a simple harmonic oscillator, Can you show ma...

Can you show mathematically that the total energy of a simple harmonic oscillator remains constant?

Heat equation + matlab, I need to solve and write a MATLAB code the heat eq...

I need to solve and write a MATLAB code the heat equation by two methods ( Crank-Nicolson method and asymptotic method )

How is radiation release from the body, Q. How is radiation release from th...

Q. How is radiation release from the body? Answer:- The body radiates energy by thermal conduction through the skin to the clothes, air, and so on around the body. A littl

Definition of collision, COLLISION:  "When two or more bodies come cl...

COLLISION:  "When two or more bodies come close to each other, so that there is some part of interaction among them, with or without the presence of external force, we say tha

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd