Design
The relative light stability of Kalsec Durabrite® 80,000 paprika and a typical, commercially available 80,000 paprika were studied. The oleoresins were dispersed at one percent on flour salt and four, five-gram portions of each were weighed into glass dishes. These dispersions were compressed to produce a uniform surface. The dishes were covered with a glass top and placed in a light box at 210 foot-candles. This procedure was repeated every seven days for the next 21 days. At 28 days, final dispersions were made of each of the test products. Samples in the light box were removed and all dispersions were analyzed as follows:

Color Value (SIU)
Retained color was measured using Method 20.1 of Off. Anal. Meth. of the Amer. Spice Trade Assoc., 3 ed. Color retained at 7, 14, 21, and 28 days is reported as a percentage of color present at day 0.

Sensory
A sample of paprika oleoresin dispersed onto salt and having a typical rancid or "off aroma" was provided to panelists as the standard against which the test samples were evaluated. Panelists were asked to select the test samples which exhibited the same aroma characteristics as the standard. These samples are designated with a  to indicate an "off aroma." Samples which were not similar to the control are designated with a  .

Measurement of Hexanal in Headspace by Gas Chromatography
Duplicate two-gram aliquots of the test samples were placed in 22 ml headspace vials with Al/silicone caps. The samples were equilibrated @ 40°C for 30 minutes and the headspace was injected onto Supl-Q PLOT column (30m X 0.53mm) using a helium carrier gas at 9 ml per minute. The oven gradient was 35°C (5 min.) to 200°C @ 20°C/minute. This temperature was held for 15 minutes. Retention time of hexanal is 14.6 min. using a FID at 250°C. Results are reported as mean area counts of hexanal.

Visual (Photograph)
Prior to being photographed, samples were blended to produce a uniform representation of the contents of each sample container.

Results and Conclusions
Durabrite® Oleoresin Paprika outperformed the standard Kalsec® oleoresin paprika in all evaluations. After 14 days under light, the Durabrite® Paprika retained 95 percent of its original color, while the standard product lost 23 percent. At day 28, the Durabrite® Paprika retained 81 percent as compared to a 90 percent loss for the standard.

Durabrite® Oleoresin Paprika also outperformed the standard as measured by sensory evaluation of aroma. At 14 days, the Durabrite® sample was judged to be typical while the standard was judged to have developed an "off aroma." The data further indicates that "off aroma" develops while visual appearance may still be acceptable ("off aroma" was detected at a color loss of 8-13 percent).

Hexanal, easily measured by gas chromatography, is a marker compound indicating oxidation in fats and oils. The Durabrite® sample measured 7,400 area counts at 14 days and was judged to be acceptable by sensory evaluation. The standard measured 72,500 area counts at 14 days and was judged to be unacceptable by sensory evaluation. Thus, the Durabrite® Paprika dispersion exhibited superior resistance to lipid oxidation as well as greater color stability.