How do you draw the calibration curve for estimation of potassium in soil using flame photometry?

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First you need to run a set of samples of known concentration through the detector. They need to be of a sufficient different in concentration in order that they can create a linear line.

You then need to plot about 5 or 6 of these samples onto a graph and then mark the line of best fit (basically the best place where a straight line fits). You can then work out the equation of this line by first finding the gradient (m=y2-y1/x2-x1) and slotting that into y=mx+c (c will most likely be 0). You can then run your potassium sample through and plot the position on the y-axis (whatever technique it measures; absorption etc.) and then draw a straight line to the y=mx+c and then a line down towards the x-axis (concentration). This will allow you to measure the concentration as it will be the same as the distance that you measure with a ruler (assuming you make the scale the same)
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How does lithium serve as an ionization suppressant in flame photometry?

Answer . \nBerry, Chappell & Barnes (1946) showed that, in estimating sodium and potassium by flame photometry, there were definite improvements in precision and accuracy

What is flame photometry?

flame photometry involves the determination of concentration of alkali and alkaline earth metals present in a sample based on the radiation emitted by it when the sample is a

Why can you use a calibration curve for getting equilibrium data?

I'm doing this lab, and it was explained to me by my instructor... Basically, on the x-axis you'll have the concentration of a substance, and on the y-axis you'll have the %T,

What is the instrumentation of flame photometry?

The instrument of flame photometry is called the photometer orflame atomic emission spectrometer. A solution is aspirated intothe flame, and studied.

Application of flame photometry in biological samples?

this technique is used for the determination of. sodium. potassium. and lithium (in case of Lithium therapy). in biological specimens received in laboratories

Would it be reliable to use the simple calibration curve method for the determination of potassium by flame photometry in seawater?

For a calibration curve method it is required that the composition (matrix) of standard and sample is nearly identical.when it is impossible to match the composition of the sa

What is principle of flame photometry?

Principle of flame photometry Flame photometry relies upon the fact that: Ă‚Â· the compounds of the alkali and alkaline earth metals can be thermally dissociated in a fla

How Estimation of Sodium using Flame photometer?

When an alkali metal salt drawn into a non-luminous flame will ionise, absorb energy from the flame and then emit light of a characteristic wavelength as the excited atoms dec

What is Diff between flame emission spectro-photometry and atomic absorption spectro-photometry?

flame photometer emit energe can measure and atomic absorption can mear absorberd energy and in flame photometr flame use as a soure and in atomic absorption hallow cathode la

Why cant the concentration of iron be detected by flame emission photometry?

Flame photometry can be used for the measurement of elements which can easily be excited like Ca, K, Na, Ba, Cu etc. However due to low temperature of flame the elements like

Why potassium dichromate used for the calibration of absorbance in UV spectometer?

Because it shows characteristic known wavelengths at 235,257,313 and 430 at specified dilutions!

Industrial applications of flame photometry?

Ă‚Â· Analysis of industrial water, natural water for determining elements responsible for hard water (magnesium, barium, calcium etc.) is standard procedure in many laborator
In Elements and Compounds

Why use potassium dichromate in uv calibration?

because its show characterestic absorbent
In Chemistry

Why transition metal can not be determined by a flame photometry?

Since the temperature isn't high enough to excite transition metals, the method is selective toward detection of alkali and alkali earth metals.
In Uncategorized

What are the shortcomings of flame photometry?

Flame photometry has many disadvantages. Perhaps the most difficult of these is the control of the many variables. The intensity from a flame is dependent on the flame tempera
In Chemistry

What are the advantages of flame photometry?

It is a simple and not very expensive method to quantitatively determine traces of alkali or alkali earth metals.
In Chemistry

Why the sea water is diluted in flame photometry?

Because the sodium concentration is too high, out of the determination range of the instrument.