72-11In Situ Sensors for Monitoring the Marine Environment
can be easily adapted for use with automatic or robotic systems. Measurements can be taken rapidly (less
th
an
1 s)
,
an
d
sen
sitivity
(m
g
L
−1
or better) is similar for most chemical elements. Michel etal. (2007) dem-
onstrated,
in la
boratory,
th
e
po
tential
of th
is
ap
proach
fo
r
th
e
de
tection
of ca
lcium,
po
tassium,
li
thium,
ma
nganese,
an
d
so
dium
in se
awater
. Ch
anges
in pr
essures,
te
mperature,
an
d
sa
linity
ha
d
li
ttle
e
ect
on
th
e
sig
nal
. Pr
eliminary
re
sults
su
ggest
th
at
th
is
te
chnique
co
uld
in th
e
fu
ture
be su
itable
fo
r
th
e
in
situ
ch
emical
a
nalysis
o
f
t
he
m
arine
e
nvironment
.
Me
mbrane
in
let
ma
ss
spe
ctrometers
ha
ve
bee
n
us
ed
fo
r
th
e
in
situ
me
asurements
of di
ssolved
ga
ses
an
d
vo
latile
or