Quantitative test for sulfur dioxide in orange juice

In summary, sulfur dioxide levels in orange juice are measured using a quantitative test called the Ripper method, which ensures that the preservative is within safe and legal limits. In the United States, the maximum allowed level is 10 ppm, while in the European Union it is 20 ppm. Sulfur dioxide can be removed from orange juice through degassing, but this may also affect the flavor and aroma. High levels of sulfur dioxide can cause health concerns, especially for those who are sensitive or allergic to it, and it is important to monitor intake and consult a doctor if any adverse reactions occur.
  • #1
flumbie
12
0
Is there a quantitative test for the amount of sulfur dioxide in orange juice. Nothing too complicated, I am only in year 11. Can it be done using titration?
 
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  • #2
yes, although i can't remember the corrrect procedure from top of my head. It goes something like this, Sample is heated(with H+) with N2 bubbling thru the mixture, the gas produced is collected in a separate flask with hydrogen peroxide and the subsequent solution is titrated with NaOH.
 
  • #3
anyone care to elaborate? a link maybe? i seem to be having trouble finding anything with google. many thanks in advance
 

1. How is sulfur dioxide measured in orange juice?

Sulfur dioxide is measured in orange juice using a quantitative test, also known as the Ripper method. This involves adding a specific volume of orange juice to a solution containing iodine and potassium iodide, which reacts with the sulfur dioxide to produce a color change. The intensity of the color is then measured using a spectrophotometer.

2. What is the purpose of testing for sulfur dioxide in orange juice?

The purpose of testing for sulfur dioxide in orange juice is to ensure that the level of this preservative is within safe and legal limits. Sulfur dioxide is commonly used in the production of orange juice to prevent spoilage and maintain its color, but high levels can be harmful to human health.

3. What is the acceptable level of sulfur dioxide in orange juice?

The acceptable level of sulfur dioxide in orange juice varies by country. In the United States, the maximum allowed level is 10 parts per million (ppm), while in the European Union it is 20 ppm. It is important for manufacturers to adhere to these limits to ensure the safety of their product.

4. Can sulfur dioxide be removed from orange juice?

Yes, sulfur dioxide can be removed from orange juice through a process called degassing. This involves bubbling carbon dioxide through the juice, which reacts with the sulfur dioxide to form a gas that can be released. However, this process may also remove some of the natural flavors and aromas in the juice.

5. Are there any health concerns associated with consuming sulfur dioxide in orange juice?

High levels of sulfur dioxide in orange juice can cause adverse health effects, particularly in those who are sensitive or allergic to this preservative. Symptoms may include nausea, diarrhea, and difficulty breathing. It is important for individuals to monitor their intake of sulfur dioxide and consult a doctor if they experience any adverse reactions.

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