Stable carbon isotope ratio analysis of Australian orange juices

Detection of Adulteration in Australian Orange Juices by Stable Carbon Isotope Ratio Analysis (SCIRA)

“…When the two groups of concentrated orange juice samples were combined, the δ 13 C values were in the range expected for C 3 plants from -23.8 to -24.7 ppt, with a mean of -24.2 ppt (SD ) 0.21). These results are similar to the results of previous work on Australian (20) and Israeli ( 14) orange juices and are typical of the type of results that have been observed for the Mediterranean region generally. They are considerably more positive than the results reported for other citrus areas such as Florida and Brazil except for the work reported by Doner and Bills (7).…”

Multielement Analysis of Argentinean Lemon Juices by Instrumental Neutronic Activation Analysis and Their Classification According to Geographical Origin

“…In addition, it has been reported that different species of citrus have individual profiles , , making these elements potentially useful for controlling citrus products for truth-in-labeling . Several works have been carried out to study the characterization of citrus fruits (including lemons), based on organic constituents , , mineral contents or compositions – , isotope ratios, or their combination – .…”

A Framework for the Incorporation of Isotopes and Isoscapes in Geospatial Forensic Investigations

“…The second critical step is extending this theory to both the hydrogen and oxygen isotope ratios of plant tissue water (Dongmann et al 1974;Flanagan et al 1991;Lai et al 2008) and eventually to the labile signal of water that might be recorded in plant organic matter (Richter et al 2008;Roden et al 2000). Understanding how environmental factors drive changes in the isotopic composition of plant-tissue water in stems, leaves, and fruits is essential to understanding hydrogen and oxygen isotope ratio variations in cellulose, but are also significant in their own right because product adulteration often occurs in fruit juices, wine, and other plant-based beverages (Breas et al 1994;Pupin et al 1998;Simpkins et al 2000). Provenancing of wines and juices is already of significant forensic, commercial, and regulatory interest in the EU (Breas et al 1994;Rossmann et al 1999).…”