77
80,-------------------------,
,' "
~40
S Cl.
I
;>,
.D 20
""
E
u
: ..
.- ...
.':1"
.- ...
..
. .
..
00
20
40
60
80
chlorophyll § by spectrophotometry (flQ/I)
JGOFS INTERCALIBRATION-I
MIXED STANDARD A
0.50.------------------------------------------------,
-::J 0.4·0
ci-6
z
Q
i f- Z
OJ
()
z
8
-::J
ci-6
z
Q
i f- z OJ
()
z
8
fz
OJ
::<
Cl
ii:
"'-ElA
0.30
0.20
0.10
0.00
0.240.22
0.20
0.18
0.1 B
0.140.12
0.10
0.08
O.OB
0.040.02
0.00
CHL A
FUCOX
DIADIN
B-CAR
Figure 10. a) Correlation of chi a measured after HPLC separation (method of Mantoura and Llewellyn) and
concentrations measured with conventional spectrophotometric methods. b) Example of Dr. R. Bidigare's
intercalibration exercise, 1989 - 1990 (JGOFS)