Table 2.

Comparison of the elemental composition of “modern” and “old” FGDG found in literature.

Element	“Modern” FGDGa		“Old” FGDGb
	Mean	Range	Mean	Range
	mg/kg	mg/kg	mg/kg	mg/kg
Al	653	140–2,120	13,700	6,000–28,000
As	2.17	1.35–2.99	74.7	5.4–213
B	11.1	2.24–42.4	145	68–302
Ba	58.6	6.91–123	n.r.	n.r.
Ca	198,000	160,000–243,000	312,000	241,000–412,000
Cd	0.40	0.08–1.12	2.3	0.5–3.9
Co	0.96	0.312–2.22	8.9	3.9–27.3
Cr	5.67	1.8–13.2	16.9	11.7–25.3
Cu	0.70	<0.378–3.25	177	16.5–913
Fe	697	334–1,230	16,000	7,000–27,000
Hg	0.54	0.198–1.33	<5	<5
K	393	183–700	1,200	800–1,500
Li	54.8	9.18–268	11.4	5.2–20.0
Mg	2,060	600–7,430	91,800	3,800–162,000
Mn	31.3	0.97–160	207	63–625
Mo	1.65	0.59–5.58	8.6	<0.02–25.3
Na	307	36–577	n.r.	n.r.
Ni	2.19	0.884–5.02	33	16.4–58.2
P	94.3	22.1–272	141	59–235
Pb	1.59	1.33–1.84	11	5.0–28.0
S	177,000	143,000–209,000	126,000	82,000–183,000
Sb	8.04	4.57–10.9	n.r.	n.r.
Se	8.25	2.92–18.8	4	2.3–4.6
Si	644	176–1,230	25,000	20,000–34,000
Sr	163	67–269	308	98–895
Tl	<1.44	<1.44–2.8	n.r.	n.r.
V	7.22	1.38–29.8	20	0.0–41.6
Zn	14.5	4.26–29	163	55–389

n.r.: nor reported.

^aSource: Kost et al. (2005) as reported by Koralegedara et al. (2017).

^bSource: Kost et al. (2018).