Table 2.

Major volatile constituents of expressed essential oil from the fruit peels of Citrus limon (L.) Osbeck as defined based on ISO standard (855;2003) specifications and batch to batch variation based on the analysis of 10 batches. The content of each constituent is expressed as the area per cent of the corresponding chromatographic peak (% GC area), assuming the sum of chromatographic areas of all detected peaks as 100%

Constituent	CAS no	FLAVIS no	Specification (%)	% of GC area
EU register name				Meana	Range
d‐Limonene	5989‐27‐5	01.045	60–73	64.8	61.2–66.7
β‐Pinene (pin‐2(10)‐ene)	127‐91‐3	01.003	9–18	13.3	11.0–16.8
γ‐Terpinene	99‐85‐4	01.020	6–12	9.04	7.66–11.5
α‐Pinene (pin‐2(3)‐ene)	80‐56‐8	01.004	1.3–3.0	2.74	2.23–3.63
Sabinene (4(10)‐thujene)	3387‐41‐5	01.059	0.3–3.0	2.21	1.41–2.65
Geranial	141‐27‐5	05.188	0.1–2.0	1.30	0.65–2.08
Neral	106‐26‐3	05.170	0.1–1.8	0.87	0.39–1.43
Total				94.2	92.4–95.5

EU: European Union; CAS no.: Chemical Abstracts Service number; FLAVIS number: EU Flavour Information System numbers.

^aMean calculated on 10 batches.