3.4.6. Color Analysis

For color evaluation, an NH310 portable spectrophotometer (Shenzhen Threenh Technology Co., Ltd., Shenzhen, China) equipped with internal software was applied. Before the examinations, 2 mL of the sample were inserted into a transparent plastic cuvette. The measurements were carried out in a cuvette inserted into the dedicated measurement chamber. The color tests were repeated 10 times, and the average values with the SD were

recorded. The whiteness index (*WI*) of the emulsions was calculated using the following equation [63]:

$$WI = 100 - \left[\left(100 - L\*\right)^2 + a\*^2 + b\*^2\right]^{1/2}$$
