2. 0 5 1
0 1
5 2
0 2
5 3
0 3
5 4
0 4
5
R
e
t
e
n
t
i
o
nT
i
m
e(
m
i
n
)
0
.
0
0
.
2
0
.
4
0
.
6
0
.
8
1
.
0
A
b
s
o
r
b
a
n
c
e
(
A
U
)
FEB
3. Mar 1
0 5 1
0 1
5 2
0 2
5 3
0 3
5 4
0 4
5
R
e
t
e
n
t
i
o
nT
i
m
e(
m
i
n
)
0
.
0
0
.
1
0
.
2
0
.
3
0
.
4
0
.
5
0
.
6
0
.
7
A
b
s
o
r
b
a
n
c
e
(
A
U
)
4. Mar 2
0 5 1
0 1
5 2
0 2
5 3
0 3
5 4
0 4
5
R
e
t
e
n
t
i
o
nT
i
m
e(
m
i
n
)
0
.
0
0
.
2
0
.
4
0
.
6
0
.
8
A
b
s
o
r
b
a
n
c
e
(
A
U
)