Olio di semi di guava

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The bands are the producer's own specification, 'Technical data: virgin guava oil', published as an image on Amazon Oil's product page for guava oil (Psidium guajava; Amazon Oil Industry, Ananindeua, Para, Brazil, whose product pages this dataset already cites for cupuacu, murumuru, tucuma and ucuuba butters): acid value < 20.0 mg KOH/g, peroxide value < 15.0 meq O2/kg, iodine value 125-140 g I2/100 g, saponification value 185-200 mg KOH/g, density 0.920-0.991 g/ml at 25 C, refractive index (40 C) 1.4420-1.4510, unsaponifiable matter < 1.5 %, melting point 10-20 C; fatty acids lauric < 1.5, myristic < 1.0, palmitic 8.0-10.0, stearic 5.0-7.0, oleic 14.0-16.0, linoleic 65.0-70.0 %, saturated 14, unsaturated 86 %. The lauric and myristic limits are not stored: they cap traces rather than describe acids that are present (the sheet's own saturated total of 14 % is already filled by palmitic plus stearic), and stored as maxima they would make the calculator treat the oil as 2.5 % lauric/myristic. The melting point is not stored either: a 65-70 % linoleic oil does not melt at 10-20 C, and the sheet's density ceiling (0.991) and refractive index (0.01-0.02 below the 1.4605 that Kobori and Jorge measured at 40 C) look like template values. The 'typical' saponification and iodine values are measurements on this producer's oil: Correa et al. 2024 (Foods 13(10):1565) analysed three lots of Amazon Oil's cold-pressed guava seed oil - saponification index 191.01 mg KOH/g, iodine index 134.25, acid index 2.12 mg KOH/g, peroxide index 11.567 meq/kg, refractive index 1.465, Rancimat 16.04 h at 110 C (Table 3). That paper's GC-MS fatty-acid table (oleic 37.90, linoleic 44.72 %; its abstract says 35.69 % oleic) is NOT used: it contradicts the producer's specification, its own iodine value (a 45 % linoleic oil implies about 114, not 134) and other guava analyses - PlantFAdb has 80.4 % linoleic (Uruguay, 1990, #21721) and 75.5 % ('Physico-chemical properties of guava seed oil', 1991, #11092) - and the same table puts passion fruit seed oil at 38.11 % oleic, against 13.83 % in this dataset's passion fruit record, which suggests its oleic and linoleic peaks were not reliably separated. Kobori and Jorge 2005 (Cienc. Agrotec. 29(5):1008-1014), crude oil from the guava residue of a Brazilian processor, measured saponification value 189.91, iodine value 134.3, unsaponifiable matter 0.72 % (the unsaponifiable 'typical') and refractive index 1.4605 at 40 C. The specification midpoints imply about 192.5 mg KOH/g and an iodine value near 134, consistent with both measurements. FOR SOAP: a sunflower-like linoleic oil (65-70 %) - soft and oxidation-prone, best as a superfat addition. INCI name, CAS and EC numbers are CosIng's; Amazon Oil's page prints the same CAS number.

Questa scheda fa parte della database aperto degli ingredienti (ODbL). Hai trovato un errore o una fonte primaria migliore? Il dataset è su GitHub; le correzioni con il link a un documento sono benvenute.