Measuring alcohol content

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How do you measure alcohol content in a fermented drink without relying on measurements of gravity?

Say we have a bottle of water (pasteurized), add sugar (that has been treated to have no living organisms on it), and then a packet of 100% pure yeast. Then we can measure the gravity before and after to calculate how much alcohol must have been produced.

However, consider the thought experiment where you do the same thing as above. But you're unsure what yeast actually does. Your hypothesis is that it produces alcohol, but you're unsure that maybe it produces something else. What instrument can you use to specifically measure alcohol % directly, not indirectly be using knowledge of the metabolism of yeast. This includes capturing the C02 produced and calculating the amount of alcohol.

yeast measurements alcohol

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asked 5 hours ago

pkofod

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up vote
3
down vote

favorite

How do you measure alcohol content in a fermented drink without relying on measurements of gravity?

Say we have a bottle of water (pasteurized), add sugar (that has been treated to have no living organisms on it), and then a packet of 100% pure yeast. Then we can measure the gravity before and after to calculate how much alcohol must have been produced.

However, consider the thought experiment where you do the same thing as above. But you're unsure what yeast actually does. Your hypothesis is that it produces alcohol, but you're unsure that maybe it produces something else. What instrument can you use to specifically measure alcohol % directly, not indirectly be using knowledge of the metabolism of yeast. This includes capturing the C02 produced and calculating the amount of alcohol.

yeast measurements alcohol

share|improve this question

asked 5 hours ago

pkofod

1162

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pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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up vote
3
down vote

favorite

up vote
3
down vote

favorite

How do you measure alcohol content in a fermented drink without relying on measurements of gravity?

Say we have a bottle of water (pasteurized), add sugar (that has been treated to have no living organisms on it), and then a packet of 100% pure yeast. Then we can measure the gravity before and after to calculate how much alcohol must have been produced.

However, consider the thought experiment where you do the same thing as above. But you're unsure what yeast actually does. Your hypothesis is that it produces alcohol, but you're unsure that maybe it produces something else. What instrument can you use to specifically measure alcohol % directly, not indirectly be using knowledge of the metabolism of yeast. This includes capturing the C02 produced and calculating the amount of alcohol.

yeast measurements alcohol

share|improve this question

asked 5 hours ago

pkofod

1162

New contributor

pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

How do you measure alcohol content in a fermented drink without relying on measurements of gravity?

Say we have a bottle of water (pasteurized), add sugar (that has been treated to have no living organisms on it), and then a packet of 100% pure yeast. Then we can measure the gravity before and after to calculate how much alcohol must have been produced.

However, consider the thought experiment where you do the same thing as above. But you're unsure what yeast actually does. Your hypothesis is that it produces alcohol, but you're unsure that maybe it produces something else. What instrument can you use to specifically measure alcohol % directly, not indirectly be using knowledge of the metabolism of yeast. This includes capturing the C02 produced and calculating the amount of alcohol.

yeast measurements alcohol

yeast measurements alcohol

share|improve this question

asked 5 hours ago

pkofod

1162

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pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 5 hours ago

pkofod

1162

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pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

share|improve this question

asked 5 hours ago

pkofod

1162

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pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 5 hours ago

pkofod

1162

asked 5 hours ago

pkofod

1162

1162

New contributor

pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

New contributor

pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

pkofod is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

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2 Answers
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A vinometer can mesure alcohol of a dry wine (all sugar needs to be fermented). You would need to add some dye to see the results if you have a transparent liquid. It can usually measure between 0 and 20%.

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answered 4 hours ago

Philippe

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If you don't want to do refractometry or hydrometry, your next best generic option would be ebulliometry, which is basically measuring the boiling point of the liquid; the boiling point depends upon how much alcohol is there.

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answered 38 mins ago

Dave

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

active

oldest

votes

active

oldest

votes

up vote
2
down vote

A vinometer can mesure alcohol of a dry wine (all sugar needs to be fermented). You would need to add some dye to see the results if you have a transparent liquid. It can usually measure between 0 and 20%.

share|improve this answer

answered 4 hours ago

Philippe

2,6931725

add a comment | 

up vote
2
down vote

A vinometer can mesure alcohol of a dry wine (all sugar needs to be fermented). You would need to add some dye to see the results if you have a transparent liquid. It can usually measure between 0 and 20%.

share|improve this answer

answered 4 hours ago

Philippe

2,6931725

add a comment | 

up vote
2
down vote

up vote
2
down vote

A vinometer can mesure alcohol of a dry wine (all sugar needs to be fermented). You would need to add some dye to see the results if you have a transparent liquid. It can usually measure between 0 and 20%.

share|improve this answer

answered 4 hours ago

Philippe

2,6931725

A vinometer can mesure alcohol of a dry wine (all sugar needs to be fermented). You would need to add some dye to see the results if you have a transparent liquid. It can usually measure between 0 and 20%.

share|improve this answer

answered 4 hours ago

Philippe

2,6931725

share|improve this answer

share|improve this answer

answered 4 hours ago

Philippe

2,6931725

answered 4 hours ago

Philippe

2,6931725

answered 4 hours ago

Philippe

2,6931725

2,6931725

add a comment | 

add a comment | 

up vote
1
down vote

If you don't want to do refractometry or hydrometry, your next best generic option would be ebulliometry, which is basically measuring the boiling point of the liquid; the boiling point depends upon how much alcohol is there.

share|improve this answer

answered 38 mins ago

Dave

38816

add a comment | 

up vote
1
down vote

If you don't want to do refractometry or hydrometry, your next best generic option would be ebulliometry, which is basically measuring the boiling point of the liquid; the boiling point depends upon how much alcohol is there.

share|improve this answer

answered 38 mins ago

Dave

38816

add a comment | 

up vote
1
down vote

up vote
1
down vote

If you don't want to do refractometry or hydrometry, your next best generic option would be ebulliometry, which is basically measuring the boiling point of the liquid; the boiling point depends upon how much alcohol is there.

share|improve this answer

answered 38 mins ago

Dave

38816

If you don't want to do refractometry or hydrometry, your next best generic option would be ebulliometry, which is basically measuring the boiling point of the liquid; the boiling point depends upon how much alcohol is there.

share|improve this answer

answered 38 mins ago

Dave

38816

share|improve this answer

share|improve this answer

answered 38 mins ago

Dave

38816

answered 38 mins ago

Dave

38816

answered 38 mins ago

Dave

38816

38816

add a comment | 

add a comment | 

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