AQA 21-18a/ AQA 21-19b Sea Water and Low Salinity Sea Water Characteristics

S1 AQA 21-18
100 mL
filtered sea water
preserved in
2% HNO3 (v/m)
for
dissolved elements

Ag

0.05-2

TBA

As

0.05-5

Be

0.05-2

Cd

0.05-2

Cr

0.05-2

Cu

0.5-10

Fe

0.5-10

Hg

0.010-0.05

Mn

0.5-510

Ni

0.05-2

P

<150

Pb

0.05-2

Se

0.05-5

Sn

0.05-5

Tl

0.05-5

U

0.05-5

V

0.1-5

Zn

0.5-10

S2 AQA 21-18
100 mL
low salinity unfiltered sea water
preserved in
2% HNO3 (v/m)
for
total elements

Al

<25

As

1-10

B

>500

Ba

<100

Bi

0.5-10

Co

0.5-10

Cr

0.5-10

Cu

5-20

La

<25

Li

0.5-10

Mn

5-20

Mo

<50

Rb

0.1-2

Pb

0.5-10

Sb

0.5-10

Se

0.5-10

Sr

>5

V

0.5-10

Zn

5-20

S3 AQA 21-18
100 mL
HIGH CONTAMINATED filtered sea water
preserved in
2% HNO3 (v/m)

Same analytes as for S1

100 to 1000 times higher than for S1

S1 AQA 20-19
200 mL
filtered frozen sea water

mg/L

Ammonia-N, Nitrate-N

<0.5

Chloride, Fluoride, Sulphate

TBA

Dissolved Organic Carbon (dNPOC)

<5

Orthophosphate-P (FRP)

<0.5

Total Dissolved Nitrogen 

<0.5

Total Dissolved Phosphorus

<0.5

S1 AQA 20-19
400 mL
unfiltered frozen sea water

B, Ca, K, Mg, Na, P (total)

<5

Total Kjeldahl Nitrogen, Total Nitrogen

<5

Total Organic Carbon (as NPOC)

<50

Alkalinity to pH 4.5 as CaCO3

<500

Total Hardness (CaCO3)

<5000

pH (at 25°C), EC (at 25°C)

TBA