Oxalate Ion in Guava Fruit: What It Is and Why It Matters for Freelancers (PDF)
Presence Of Oxalate Ion In Guava Fruit Pdf Freel
Guava is a delicious tropical fruit that is rich in vitamin C, antioxidants, and dietary fiber. But did you know that guava also contains oxalate ions, which are organic compounds that can form kidney stones? In this article, we will explore the presence of oxalate ions in guava fruit, how they vary with different stages of ripening, and how to measure them using a simple titration method.
Presence Of Oxalate Ion In Guava Fruit Pdf Freel
What are oxalate ions and why are they important?
Oxalate ions are negatively charged molecules that are found in many plants and animals. They are not essential for our body and are excreted in urine as waste. However, if the urine becomes too concentrated with oxalate ions, they can combine with calcium and form crystals that can grow into kidney stones. Kidney stones are painful and can cause urinary tract infections, bleeding, and kidney damage.
Some factors that can increase the risk of kidney stones are dehydration, high intake of animal protein, salt, sugar, and vitamin C supplements, low intake of calcium and magnesium, and genetic predisposition. Some foods that are high in oxalate ions are spinach, rhubarb, beetroot, nuts, chocolate, tea, coffee, and guava.
How does the oxalate ion content of guava vary with ripening?
Guava is a fruit that has a high percentage of vitamin C among citrus fruits. It also contains oxalate ions, which can increase with ripening. According to a study by Warade et al., the content of oxalate ions in guava was found to be 59.67 percent when plucked from the tree. It was also noticed that the content of oxalic ions grows with ripening of guava. The fully ripe fruit had the maximum oxalate content of 73.33 percent.
This means that eating unripe or partially ripe guava can reduce the intake of oxalate ions and prevent kidney stone formation. However, ripe guava also has more vitamin C and antioxidants, which have many health benefits. Therefore, it is advisable to balance the consumption of guava with other low-oxalate fruits and vegetables.
How to measure the oxalate ion content of guava using titration?
Titration is a laboratory technique that involves adding a known solution (called titrant) to an unknown solution (called analyte) until a chemical reaction is complete. The point at which the reaction is complete is called the end point, which can be detected by a color change or an indicator.
To measure the oxalate ion content of guava using titration, we need to extract the oxalate ions from the fruit by boiling pulp with dilute sulfuric acid. Then we need to titrate the solution with potassium permanganate solution, which is a strong oxidizing agent that can react with oxalate ions and produce carbon dioxide and water. The end point of the titration is marked by a color change from colorless to pink.
The equation for the reaction is:
C2O4 + 2MnO4 + 16H -> 2Mn + 10H2O + 2CO2
The procedure for the titration is as follows:
Weigh about 50 g of fresh guava and crush it to a fine pulp using a pestle and mortar.
Transfer the pulp to a 250 ml beaker and add about 150 ml of dilute sulfuric acid (10% concentration).
Boil the mixture for about 10 minutes on a hot plate or a Bunsen burner.
Cool the mixture and filter it using a filter paper and a funnel into a 250 ml volumetric flask.
Make up the volume to 250 ml by adding distilled water.
Pipette out 20 ml of this solution into a conical flask and add a few drops of phenolphthalein indicator.
Taking potassium permanganate solution (0.02 M) in a burette, titrate it against the guava extract solution until a faint pink color persists for at least 30 seconds.
Note down the burette reading at the end point and repeat the titration for two more times to get consistent readings.
Calculate the average volume of potassium permanganate solution used for titration.
Using the equation and the molarities of the solutions, calculate the amount of oxalate ions present in 100 ml of guava extract solution.
Multiply this amount by 5 to get the amount of oxalate ions present in 500 ml of guava extract solution (which corresponds to 50 g of fresh guava).
Divide this amount by 50 to get the percentage of oxalate ions present in fresh guava.
How to prevent kidney stones from oxalate ions?
Kidney stones are a common and painful condition that can affect anyone. However, there are some ways to prevent them from forming or growing. Here are some tips to reduce the risk of kidney stones from oxalate ions:
Drink plenty of water and fluids throughout the day. This can help dilute the urine and flush out the oxalate ions and other minerals that can form stones.
Avoid excessive intake of foods and drinks that are high in oxalate ions, such as spinach, rhubarb, beetroot, nuts, chocolate, tea, coffee, and ripe guava. Instead, eat more low-oxalate fruits and vegetables, such as bananas, oranges, grapes, apples, carrots, cucumbers, and lettuce.
Consume enough calcium and magnesium in your diet. Calcium and magnesium can bind with oxalate ions in the digestive tract and prevent them from being absorbed into the bloodstream and reaching the kidneys. Good sources of calcium and magnesium are dairy products, tofu, beans, seeds, nuts, and green leafy vegetables.
Limit your intake of animal protein, salt, sugar, and vitamin C supplements. Animal protein can increase the acidity of urine and make it more conducive for stone formation. Salt and sugar can increase the excretion of calcium and oxalate in urine. Vitamin C supplements can be metabolized to oxalate in the body and increase its level in urine.
Exercise regularly and maintain a healthy weight. Exercise can help prevent obesity, diabetes, and high blood pressure, which are risk factors for kidney stones. Exercise can also improve blood circulation and kidney function.
Conclusion
Guava is a nutritious fruit that has many health benefits. However, it also contains oxalate ions, which can cause kidney stones if consumed in excess or if the urine is too concentrated. The oxalate ion content of guava increases with ripening, so it is better to eat unripe or partially ripe guava to reduce the intake of oxalate ions. The oxalate ion content of guava can be measured using a simple titration method with potassium permanganate solution. To prevent kidney stones from oxalate ions, it is important to drink enough water, avoid high-oxalate foods and drinks, consume enough calcium and magnesium, limit animal protein, salt, sugar, and vitamin C supplements, and exercise regularly.
Conclusion
Guava is a nutritious fruit that has many health benefits. However, it also contains oxalate ions, which can cause kidney stones if consumed in excess or if the urine is too concentrated. The oxalate ion content of guava increases with ripening, so it is better to eat unripe or partially ripe guava to reduce the intake of oxalate ions. The oxalate ion content of guava can be measured using a simple titration method with potassium permanganate solution. To prevent kidney stones from oxalate ions, it is important to drink enough water, avoid high-oxalate foods and drinks, consume enough calcium and magnesium, limit animal protein, salt, sugar, and vitamin C supplements, and exercise regularly. b99f773239