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Mineral Content in Peanut and Determination of Each Mineral Content by Titration Method

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By Biswanath Panda

Peanuts are a popular snack and ingredient in many dishes, but did you know that they are also a rich source of minerals? Peanuts contain various minerals that play important roles in maintaining good health, such as magnesium, phosphorus, potassium, zinc, iron and calcium. In this blog, we will discuss the minerals found in peanuts and the step-by-step process of analyzing each mineral using the titration method.


Mineral Content in Peanuts:

  1. Magnesium: A serving of peanuts contains approximately 63 mg of magnesium, which is important for maintaining heart health, regulating blood sugar levels, and supporting strong bones.
  2. Phosphorus: Peanuts are also a good source of phosphorus, with a serving containing approximately 168 mg. Phosphorus is important for maintaining healthy bones and teeth, and for the production of DNA and RNA.
  3. Potassium: Peanuts are high in potassium, with a serving containing approximately 705 mg. Potassium is important for maintaining healthy blood pressure, regulating heart function, and supporting healthy muscle function.
  4. Zinc: A serving of peanuts contains approximately 2.9 mg of zinc, which is important for maintaining a healthy immune system, wound healing, and taste perception.
  5. Iron: Peanuts are a good source of iron, with a serving containing approximately 2.3 mg. Iron is important for carrying oxygen in the blood and supporting healthy brain function.
  6. Calcium: Peanuts also contain a small amount of calcium, with a serving containing approximately 26 mg. Calcium is important for maintaining strong bones and teeth, as well as for blood clotting and muscle function.

Analysis of Magnesium in Peanuts using the Titration Method:

The titration method can be used to determine the concentration of magnesium in peanuts. The steps for this analysis are as follows:

  1. Prepare a sample solution by grinding peanuts and adding distilled water.
  2. Add an acidic solution, such as nitric acid, to the sample to convert the magnesium to a form that can be titrated.
  3. Add a solution of known concentration of ethylenediaminetetraacetic acid (EDTA) to the sample and wait for a few minutes.
  4. Slowly add a solution of known concentration of a metal ion indicator, such as Eriochrome Black T, to the sample until the reaction is complete, as indicated by the change in color of the indicator.

The concentration of magnesium in the sample can be calculated using the following formula:

[Magnesium] = (Volume of EDTA added x Concentration of EDTA) / Equivalence point

Where [Magnesium] represents the concentration of magnesium in the sample solution, volume of EDTA added is the amount of EDTA used in the reaction, concentration of EDTA is the known concentration of EDTA, and equivalence point is the point at which the reaction is complete, as determined by the indicator.

Analysis of Phosphorus in Peanuts using the Titration Method:

The titration method can also be used to determine the concentration of phosphorus in peanuts. The steps for this analysis are as follows:

  1. Prepare a sample solution by grinding peanuts and adding distilled water.
  2. Add a solution of sodium hydroxide to the sample to convert the phosphorus to a form that can be titrated.
  3. Add a solution of known concentration of ammonium molybdate to the sample and wait for a few minutes.
  4. Slowly add a solution of known concentration of stannous chloride to the sample until the reaction is complete, as indicated by the appearance of a yellow precipitate.

The concentration of phosphorus in the sample can be calculated using the following formula:

[Phosphorus] = (Volume of ammonium molybdate added x Concentration of ammonium molybdate) / Equivalence point

Where [Phosphorus] represents the concentration of phosphorus in the sample solution, volume of ammonium molybdate added is the amount of ammonium molybdate used in the reaction, concentration of ammonium molybdate is the known concentration of ammonium molybdate, and equivalence point is the point at which the reaction is complete, as determined by the appearance of the yellow precipitate.

Analysis of Potassium in Peanuts using the Titration Method:

The titration method can also be used to determine the concentration of potassium in peanuts. The steps for this analysis are as follows:

  1. Prepare a sample solution by grinding peanuts and adding distilled water.
  2. Add a solution of nitric acid to the sample to convert the potassium to a form that can be titrated.
  3. Add a solution of known concentration of silver nitrate to the sample and wait for a few minutes.
  4. Slowly add a solution of known concentration of a chloride ion indicator, such as potassium chromate, to the sample until the reaction is complete, as indicated by the appearance of a yellow precipitate.

The concentration of potassium in the sample can be calculated using the following formula:

[Potassium] = (Volume of silver nitrate added x Concentration of silver nitrate) / Equivalence point

Where [Potassium] represents the concentration of potassium in the sample solution, volume of silver nitrate added is the amount of silver nitrate used in the reaction, concentration of silver nitrate is the known concentration of silver nitrate, and equivalence point is the point at which the reaction is complete, as determined by the appearance of the yellow precipitate.

Analysis of Zinc in Peanuts using the Titration Method:

The titration method can also be used to determine the concentration of zinc in peanuts. The steps for this analysis are as follows:

  1. Prepare a sample solution by grinding peanuts and adding distilled water.
  2. Add a solution of nitric acid to the sample to convert the zinc to a form that can be titrated.
  3. Add a solution of known concentration of sodium diethyldithiocarbamate to the sample and wait for a few minutes.
  4. Slowly add a solution of known concentration of a zinc ion indicator, such as xylenol orange, to the sample until the reaction is complete, as indicated by the appearance of a red precipitate.

The concentration of zinc in the sample can be calculated using the following formula:

[Zinc] = (Volume of sodium diethyldithiocarbamate added x Concentration of sodium diethyldithiocarbamate) / Equivalence point

Where [Zinc] represents the concentration of zinc in the sample solution, volume of sodium diethyldithiocarbamate added is the amount of sodium diethyldithiocarbamate used in the reaction, concentration of sodium diethyldithiocarbamate is the known concentration of sodium diethyldithiocarbamate, and equivalence point is the point at which the reaction is complete, as determined by the appearance of the red precipitate.

Analysis of Iron in Peanuts using the Titration Method:

The titration method can also be used to determine the concentration of iron in peanuts. The steps for this analysis are as follows:

  1. Prepare a sample solution by grinding peanuts and adding distilled water.
  2. Add a solution of sulfuric acid to the sample to convert the iron to a form that can be titrated.
  3. Add a solution of known concentration of potassium dichromate to the sample and wait for a few minutes.
  4. Slowly add a solution of known concentration of a iron ion indicator, such as 1,10-phenanthroline, to the sample until the reaction is complete, as indicated by the appearance of a red-brown precipitate.

The concentration of iron in the sample can be calculated using the following formula:

[Iron] = (Volume of potassium dichromate added x Concentration of potassium dichromate) / Equivalence point

Where [Iron] represents the concentration of iron in the sample solution, volume of potassium dichromate added is the amount of potassium dichromate used in the reaction, concentration of potassium dichromate is the known concentration of potassium dichromate, and equivalence point is the point at which the reaction is complete, as determined by the appearance of the red-brown precipitate.

Calcium Analysis by Titration Method:

Calcium can also be analyzed in peanuts using the titration method. The following steps can be followed to determine the calcium content in peanuts:

  1. Prepare a peanut sample solution by crushing peanuts and dissolving them in a suitable solvent, such as water.
  2. Add a solution of known concentration of EDTA (ethylene diamine tetraacetic acid) to the sample. EDTA is a complexing agent that binds with calcium ions.
  3. Slowly add a solution of known concentration of Eriochrome Black T, a calcium-sensitive indicator, to the sample until the reaction is complete, as indicated by a color change from blue to pink.

The concentration of calcium in the sample can be calculated using the following formula:

[Calcium] = (Volume of EDTA added x Concentration of EDTA) / Equivalence point

Where [Calcium] represents the concentration of calcium in the sample solution, volume of EDTA added is the amount of EDTA used in the reaction, concentration of EDTA is the known concentration of EDTA, and equivalence point is the point at which the reaction is complete, as determined by the appearance of the pink color.

In conclusion, the titration method is a useful tool for determining the concentration of calcium in peanuts. By following the steps outlined above and using the appropriate formulas, the calcium content in peanuts can be accurately determined.

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