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About Nutrient Density
The more dense the liquid or sap, the higher the degree of refraction of the light through optical lenses and mirrors as per attached illustration.
Wiki - Nutrient density identifies the amount of beneficial nutrients in a food product in proportion to e.g. energy content, weight or amount of perceived detrimental nutrients. Terms such as nutrient rich and micronutrient dense refer to similar properties.
Grab interest
Optical Refractometers (BRIX Meters) have been-
- the best 'objective' measure of produce quality for past 200 years!
- used by Aussie farmers for past 80 years!
- used by Food Standards ANZ to provide the right measures for NHMRC's RNI calcs.
- first used (in Trentham, Vic) in 2010 to advise customers on produce quality readings , and produce "Ratings" of poor, average, good or excellent.
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How Refractometers are also used
There are many uses of Refractometers - here is but one, which we used on the RNI Chart below.
Specific gravity (SG) and ingredients
If you have a liquid ingredient, the specific gravity value is used to convert the volume of this liquid ingredient to a gram weight. The NPC does this automatically by multiplying the volume (in mL) by the specific gravity of the liquid ingredient. It needs to do this to calculate a nutrition information panel correctly.
Specific gravity and the nutrition information panel
Paragraph 5(1)(b) of Standard 1.2.8 requires that the average quantity of a beverage or other liquid food in a serving must be expressed in millilitres in your nutrition information panel. A specific gravity value is required to convert the nutrient values present in a 100 g portion of a liquid food to 100 mL, for inclusion on your nutrition information panel.
wort is used in home brewing - popular in the USA.