Registration Dossier

Administrative data

Endpoint:
monitoring data
Type of information:
other:
Adequacy of study:
supporting study
Reliability:
4 (not assignable)

Data source

Reference
Reference Type:
other: Book (chapter)
Title:
The Oceans Their Physics, Chemistry, and General Biology; Chapter: Chemistry of Seawater
Author:
Sverdrup, H. U.
Johnson, M. W.
Fleming, R. H.
Year:
1942
Bibliographic source:
Prentice-Hall, Inc., New York

Materials and methods

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: elemental concentrations
Details on test material:
naturally occuring magnesium

Results and discussion

Any other information on results incl. tables

DITTMAR'S VALUES FOR THE MAJOR CONSTITUENTS OF SEA WATER (Values in grams per kilogram, ‰)

Ion

Original values

Recalculated, 1940 atomic weights

1940 values

 

Cl = 19 ‰

%

Cl = 19 ‰

%

Cl = 19 ‰

%

 

C1

18.971

55.29

18.971

55.26

18.980

55.04

 

Br

0.065

0.19

0.065

0.19

0.065

0.19

 

SO4

2.639

7.69

2.635

7.68

2.649

7.68

 

CO3

0.071

0.21

0.071

0.21

……

……

 

HCO3

……

……

……

……

0.140

0.41

 

F

……

……

……

……

0.001

0.00

 

H3BO3

……

……

……

……

0.026

0.07

 

Mg++

1.278

3.72

1.292

3.76

1.272

3.69

 

Ca++

0.411

1.20

0.411

1.20

0.400

1.16

 

Sr++

0.013

0.04

 

K+

0.379

1.10

0.385

1.12

0.380

1.10

 

Na+

10.497

30.59

10.498

30.58

10.556

30.61

 

Total

34.311

34.328

34.482

 

Applicant's summary and conclusion

Conclusions:
Sverdrup et al. (1942) refers in chapter VI "Chemistry of Sea Water" to Dittmar (1884) who measured magnesium concentrations of 77 water samples, representative of all oceans. Samples were collected on the voyage of H.M.S. Challenger around the world. There were not any significant regional differences in the relative composition of sea water. Consequently, mean values of major dissolved constituents are respresentative for saltwater. According to Sverdrup et al. (1942), the mean of magnesium concentrations in saltwater with a chlorinity of 19 ‰ amounts to ~ 1300 mg Mg/kg.