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Using a gas chromatograph, chemists burn a small sample of a food (or a thoroughly homogenized, uniform sample). The flame emitted by the burning sample emits light of various frequencies, corresponding to the individual elements and compounds present in the sample. The spectrum of light is analyzed to determine the chemical content of the sample.
Additionally, foods will be analyzed chemically, as what we call 'vitamins and minerals' in nutritional terms, we call organic proteins and acids, and inorganic metallic compounds. Each of these will have its own chemical properties which can be detected in a laboratory environment.
Usually, however, the values for complicated, prepared food items are estimated by calculating them mathematically from known values for basic food items.
What else can I help you with?
What represents an indirect measure of the amount of energy released from food?
The amount of oxygen that's consumed when you burn your food is an indirect measure of the amount of energy that's released from the food. Bomb calorimeters are sometimes used to measure the energy content in food.
Which food nutrients contains the greatest amount of carbon?
carbohydrates
A measure of nutrients provided per calorie of food?
nutrient density
Nutritionally dense food has a large amount of?
Nutrients for the calories it provides
A measure of the relative quantity of nutrients per calorie in a food?
Nutrient Density
What is a food called that contains a large amount of nutrients?
There are several foods that contain a large amount of nutrients. The whole egg is one of the most common foods that contain the largest amounts of nutrients
Where is there the least amount of energy in the food chain?
The decomposers at the bottom of the food chain have the least amount of energy because they rely on breaking down dead organic matter to obtain nutrients. These organisms play a vital role in recycling nutrients back into the ecosystem.
Which food would have the lowest amount of nutrients?
Junk food would. It's just empty calories with no actual nutrition.
Do grams measure the amount of energy in food?
No, grams measure the weight or mass of a substance. The amount of energy in food is measured in calories or joules. The energy content is determined by the macronutrients (such as carbohydrates, proteins, and fats) present in the food.
Unit of measure for the energy stored in foods?
Kilo joules are used to measure the amount of energy stored in food.
What is the full meaning of cal?
Cal means calories. It is a measure of the amount of energy that a particular food has. So, if we eat that particular food, then we will obtain that amount of energy.
How are calories used and stored?
Calorie (upper case C) refers to food calories, or kilocalories. It's used to measure the amount of energy foods or individual nutrients provide when consumed. calorie (lower case c) refers to energy in general, not food energy. It's used to measure the amount of energy needed to increase the temperature of 1 gram of water by 1 °C at standard atmospheric pressure (101.325 kPa)
