omregning af saltværdi

[muldfred]

hejsa læste lige lidt på ricordeafarm.com og læste at de kørte med en saltværdi på en salinity of 34.!!!! hvor meget svare det til iforhold til vores scala??? det er vel ikke 1.034 de menere????

[kimtil]

Hey...

Nej det er ikke det samme..
Prøv og kigge på dit salt- Der er nok et´skema bagpå hvor du kan udlede noget.
Bruger selv 1,025-1,027 ppt

Hilsen Kim

[kimtil]

Definitions
Water salinity
Fresh water Brackish water Saline water Brine
< 0.05 % 0.05 - 3 % 3 - 5 % > 5 %
< 500 ppm 500 - 30 000 ppm 30 000 50 000 ppm > 50 000 ppm

The technical term for saltiness in the ocean is halinity, from the fact that halides - chloride specifically - are the most abundant anions in the mix of dissolved elements. In oceanography, it has been traditional to express salinity not as percent, but as parts per thousand (ppt or ‰), which is approximately grams of salt per liter of solution. Other disciplines use chemical analyses of solutions, and thus salinity is frequently reported in mg/L or ppm (parts per million). Prior to 1978, salinity or halinity was expressed as ‰ usually based on the electrical conductivity ratio of the sample to "Copenhagen water", an artificial sea water manufactured to serve as a world "standard"[1]. In 1978, oceanographers redefined salinity in the Practical Salinity Scale (PSS) as the conductivity ratio of a sea water sample to a standard KCl solution[2][3]. Ratios have no units, so it is not the case that a salinity of 35 exactly equals 35 grams of salt per litre of solution[4].

These seemingly esoteric approaches to measuring and reporting salt concentrations may appear to obscure their practical use; but it must be remembered that salinity is the sum weight of many different elements within a given volume of water. It has always been the case that to get a precise salinity as a concentration and convert this to an amount of substance (sodium chloride, for instance) required knowing much more about the sample and the measurement than just the weight of the solids upon evaporation (one method of determining "salinity"). For example, volume is influenced by water temperature; and the composition of the salts is not a constant (although generally very much the same throughout the world ocean). Saline waters from inland seas can have a composition that differs from that of the ocean. For the latter reason, these waters are termed saline as differentiated from ocean waters, where the term haline applies (although is not universally used).

Contour lines of constant salinity are called isohales.


Hey som du kan se her=so it is not the case that a salinity of 35 exactly equals 35 grams of salt per litre of solution[4].

Hlsen kim

[muldfred]

Hejsa og tak for oplysningen, men fatter ikke helt vildt meget af det , og kan slet ikke finde udaf hvormeget en saltnitet på 34 er, så hvis der er nogen der kan regne det ud for mig, ville det bare være top dollar

ps. der stå ikke noget bag på mit salt

[-Bagger-]

Hej en salinity på 34, erd det samme som en saltprocent på 3,4%, og det er det samme som en SG på 1,023 (gang med 1000 for at få den værdi man normalt bruger).

En formel der måske kan hjælpe dig..

SG = 1 + (salinity x 0,00068) = 1,0238 kg/l (35 salinity = 3,5% TDS)

[muldfred]

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