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At Methoden giver indbyrdes vel overensstemmende
Resultater, viser de talrige Saltbestemmelséi;, som udførtes
med samme Vandprøver. Saaledes fandtes ved
nedenstaaende Forsøg
Proc. Salt i II |3,o2° Proc. Salt i VII 3
3.517
■ - ni
— - IV
— — - VI
2.303
2.299
. 13.386
|3.385
Jo.530
13.533
13.270
,514
.516
.515
— — - A III
3.501
3.507
3.508
3.500
3.502
3.506
3.500
3.501
That the results obtained by this method must be
regarded as agreeing very closely inter se, is shown by the
numerous salt-determinations performed with the same
samples of water.
3 5’?5
Per cent, of Salt ill II " " Per cent, of Salt in VII
3.517
— - III
IV
3.279
–-VI
J2.303
12.299
, 13.386
|3.385
,, J 3:530
3.533
13.276
3.279
VIII
3.514
3.516
3.515
3.501
3.507
3.508
3.500
3.502
3.506
3.500
3.501
Resultaterne ere, som man ser. allerede her temmelig
vel overensstemmende, men kunde visselig gives en endnu
større Nøiagtighed, om man vilde arbeide med noget større
Quantiteter Søvand.
For Vandprøverne III og VII er Egenva?gten ved
17.-5
, _ . allerede tidligere ved Hjælp af Pyknometer bestemt
11 ,°5
til respective 1.01739 og 1.02669. for Vandprøverne IV.
V. VI og VIII er den funden ved gjentagne Aflæsninger
paa et af de corrigerede Aræometre. medens den for Proven
II kun blev bestemt ved en enkelt Aflæsning. Ligeledes
bestemtes meget omhyggeligt samtlige Vandprøvers
Chlor-mængder. Heraf kan
Saltmængden
Chlorcoefflcienten =
Egenvægtscoefflcienten =
Chlormængden
Saltmængden
Egenvægten — 1
beregnes, saaledes som det er gjort i nedenstaaende Tabel.
No. Egenvægt ved 17A 17.°:. [-Chlor-mængde Saltmængde Egén-vægts-coeffieient. Chlor-coefficient.-] {+Chlor- mængde Salt- mængde Egén- vægts- coeffieient. Chlor- coefficient.+}
II 1.02670 1,947 3-521 131.9 1.808
III 1.01739 1.271 2.301 132.3 I.810
IV ’•02573 1.868 3.3S6 j 131.6 1.813
V i .02676 1.956 3.532 132.0 1.806
VI 1.02488 1.809 3.278 131.8 1.812
VII 1.02669 1-947 3-515 131-7 1.805
VIII 1.02655 1.938 3-503 I3I-9 1.808
Som det heraf fremgaar, er baade Chlor- og
Egen-vægtscoefticienterne tiltrods for Saltgehalternes
Forskjellighed overalt meget nær constante. saa at Variationerne
Den norske Nordiiavsexpedition. Tornøe: Chemi.
These figures, it will be seen. differ but little
intet-se. and by increasing the quantity of water greater accuracy
could no doubt be attained.
17.°5
For samples III and VII, tlie specific gravity at
.... respectively 1.01739 and 1.02669. had been
previously determined by means of the pyenometer; for samples
IV. V. VI. and VIII. it was found by repeated readings
of one of the corrected areometers, whereas for sample
II it was determined by one reading only. The amount
of chlorine, too. in each sample was carefully determined.
From these data may be computed the
,, „ . . . ,„, . Amount of Salt
Coefficient ol Chlorine =z:
and the
Coefficient of Specific Gravity =
as set forth in the following Table.
Amount of Chlorine
Amount of Salt
Specific Gravity — 1
No. Spec. Grav. aÆ 17. °5 Percentage of Chlorine. Percentage of Salt. Coefficient of Spec.Gxav. Coefficient of Chlorine.
II 1.02670 1-947 3-521 13I.9 1.808
III 1.01739 1.271 2.301 I32.3 I.810
IV 1-02573 1.868 3.386 131.6 1.813
V 1.02676 1.956 3-532 132.0 1.806
VI 1.02488 1.809 3.278 131.8 1.812
VII 1.02669 1-947 3-515 131-7 1.805
VIII 1.02655 1-938 3-503 I3I-9 1.808
It thus appears, that the coefficients botli of
chlorine and specific gravity, notwithstanding the difference in
the percentage of salt, are always, very nearly constant;
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