Food Analysis - Determination of Fat in Meats

Question 1

Refractometry is used in the food industry in

Answer 1

measuring sugar water concentrations

Question 2

What refractometer do organic chemists use and why?

Answer 2

the Abbe refractometer to determine the RI of a material to ID or see how pure it is

Question 3

What was the aim of the prac?

Answer 3

to determine the amount of fat in different meats

Question 4

Refractive index

Answer 4

dimensionless number that describes how light, or any other radiation, propagates through that medium

Question 5

refractive index equation

Answer 5

n = c/v

c is the speed of light in vacuum and v is the speed of light in the substance.

Question 6

RI of fat

Answer 6

1.47

Question 7

RI bromonapthalene

Answer 7

1.65

Question 8

Anhydrous

Answer 8

containing no water

Question 9

How to determine % fat

Answer 9

= 100 Vd (n1 - n2)/w (n2 - n)

V= millilitre of bromonapthalene d = density of fat n1 = refractive index of fat n2 = refractive index of the sample w = weight of sample taken