Juice element contents

Other mineral elements are present in citrus juices in measurable quantities. McHard et al. (34) reported on the trace element contents of Florida and Brazilian orange juice. They cited concentration ranges for 25 elements. Ting (23) reported that calcium, iron, phosphorus, magnesium, zinc, and copper are present in reconstituted FCOJ at levels equivalent to about 1% to 5% of their respective U.S. RDA s. 

There have been only two comprehensive studies made on the elemental content of orange juices produced in the United States. The first of these was reported by Roberts and Gaddum (23) a little over Uo years ago. That study was a spectrographic analysis of the elemental contents of several varieties of Florida oranges and grapefruit which were grown during that period of time. Excerpts from their results are shown in somewhat modified form in Table III. 

Table IV. Elemental Content of California Valencia and Navel Orange Juices (PPM) (l96l)a...

Table VII. Ranges of Element Contents in Orange Juice Samples From Florida, Brazil, Mexico and Calif.

J. A. McHard, J. F. Foulk, J. D. Winefordner, A comparison of the trace element content of Florida and Brazil orange juice, J. Agric. Food Chem., 27 (1979), 1326-1328. 

Table Element i III. Elemental Seedling Orange Content of Several Blood Orange Varieties of Florida Orange (1937) Valencia Orange Juices (PPM)a Lue Gim Gong Orange Tangerine...

PRECOAT FILTRATION - DIATOMACEOUS EARTH FILTRATION. The mOSt economical method of filtering fruit juices with a high suspended solids content is with precoat filters. In these, the filter sheet is created by precoating a liquid-permeable filtering element with the filter aid. In addition to diatomaceous earth, perlite and cellulose are also used as filter aids in fruit juice production. 

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