Pulpwash frozen concentrated

The purpose of this presentation is to discuss the visible and ultraviolet absorption and room temperature fluorescence characteristics of alcoholic solutions of Florida produced orange juice and pulpwash samples, and to relate the characteristics to qualitative detection and quantitative approximation of adulteration of frozen concentrated and single-strength orance juices. Experimental details of our procedures may be found elsewhere (15). 

Figure 3. Spectral (VIS/VV) absorption curve comparison of commercial Florida-produced frozen concentrated orange juice (--------) and orange pulpwash ( — )...

In conclusion, it has been shown that the visible and ultraviolet absorption, and room temperature fluorescence spectra, obtained from alcoholic solutions of orange juice and related products, may be used for product characterization. The complementary absorption and fluorescence spectra may be utilized for the qualitative detection of adulteration of reconstituted frozen concentrated and single-strength orange juice with pulpwash. Previous investigations (chemical and elemental profile analyses)... 

Fig. 7 and 8 show the absorbance sum and ratio distribution of Florida commercial packed frozen orange pulpwash concentrate (reconstituted or calculated to 12.8° Brix). Sampling period was from 1971 through 1979. Absorbance sum of 206 samples showed a minimum of 2.617, maximum of 4.992, mean and standard deviation of 3.781 0.473, and coefficient of variation of 12.5%. Absorbance ratio showed a minimum of 0.017, maximum of 0.112, mean and standard deviation of 0.048 0.020, and coefficient of variation of 41.7%. 

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