Measurement of Phenolic Compounds by Spectrometry and Chromatography in Lime Juices

Table 1

Total polyphenols (mg/l), hesperidin, eriocitrin, Na⁺, and K⁺ contents of Iranian lime juice manufacturing products.

Juice	Variable	Mean^a	RSD^a (%)	Max^a	Min^a
1	Total polyphenols (mg/l)	33.00	8.25	39.48	23.71
	Hesperidin content	29.81	1.91	32.02	28.54
	Eriocitrin content	3.90	5.05	9.74	0.93
	Na^+ content	1295.29	73.40	1378.35	1293.13
	K^+ content	157.98	25.22	186.97	140.96
2	Total polyphenols (mg/l)	42.48	2.24	44.81	40.34
	Hesperidin content	41.59	6.45	46.87	34.40
	Eriocitrin content	4.11	0.24	4.37	3.89
	Na^+ content	832.88	893.99	1865.18	314.73
	K^+ content	1078.07	721.10	1529.47	246.47
3	Total polyphenols (mg/l)	42.63	3.68	44.77	38.38
	Hesperidin content	41.9	4.34	45.01	36.94
	Eriocitrin content	3.88	0.81	4.82	3.31
	Na^+ content	580.48	46.15	617.22	528.68
	K^+ content	964.0	86.07	1039.09	870.07
4	Total polyphenols (mg/l)	36.86	2.78	38.82	33.68
	Hesperidin content	29.18	0.34	29.58	28.92
	Eriocitrin content	1.12	1.94	3.37	0.00
	Na^+ content	1319.97	232.63	1612.93	972.57
	K^+ content	192.19	23.50	219.22	176.49
5	Total polyphenols(mg/l)	39.66	4.67	44.84	35.75
	Hesperidin content	47.85	4.32	56.13	39.72
	Eriocitrin content	5.69	5.32	10.55	0
	Na^+ content	370.63	41.08	411.56	329.39
	K^+ content	1988.86	34.65	2026.42	1958.13
6	Total polyphenols (mg/l)	38.90	5.23	44.18	33.71
	Hesperidin content	51.32	1.76	53.07	49.55
	Eriocitrin content	3.35	2.90	5.17	0
	Na^+ content	395.32	40.29	436.46	355.92
	K^+ content	1295.02	3.26	1297.89	1291.47
7	Total polyphenol (mg/l)	32.48	5.24	38.54	29.32
	Hesperidin content	34.81	15.48	52.63	24.59
	Eriocitrin content	1.43	2.48	4.31	0
	Na^+ content	1043.30	1043.30	1106.54	982.47
	K^+ content	49.48	49.48	619.41	522.14

^aMeans, maximum (max) and minimum (min), and relative standard deviation (RSD). Significant differences between lime juice manufacturing products and blank at , , and . is considered as nonsignificant (ns).