natgillin/translations-raw huggingface dataset:
From the equation (2) it becomes apparent that two parameters are important in defining the centrifugation condition, i.e. time (t) and speed (rpm), in order to achieve separation of particles with a specific size (in our case 0,1 μm radius): (1) the density of the soil and (2) the length of the mixture in the centrifuge tube (Rb-Rt), i.e. the distance which a soil particle covers from the top of the solution to the bottom of the tube; obviously, for a fixed volume the length of the mixture in the tube will depend on the square of the radius of the tube.
Iz enačbe 2 postane očitno, da sta pri določanju pogojev centrifugiranja, t.j. časa (t) in hitrosti (rpm) pomembna dva parametra, za ločitev delcev specifične velikosti (v našem primeru s polmerom 0,1 μm): (1) gostota tal in (2) dolžina zmesi v centrifugirki (Rb-Rt), oz. razdalja, ki jo prepotuje delec od gladine raztopine do dna centrifugirke; seveda je pri fiksni prostornini dolžina zmesi v centrifugirki odvisna od kvadrata polmera centrifugirke.
Fig. 1 presents variations in the centrifugation time (t) versus centrifugation speed (rpm) for different soil densities (ρs) (Fig.1a) and different lengths of the mixture in the centrifuge tubes (Fig.2a).
Slika 1 prikazuje spreminjanje časa centrifugiranja (t) v odvisnosti od hitrosti centrifugiranja (rpm) pri različnih gostotah tal (ps) (slika 1a) in različnih dolžinah zmesi v centrifugirkah (slika 1b).
However, it is important to find an optimal relation between centrifugation which requires the less length possible and easy handling for the experimenter in separating the phases after centrifugation.
Vendar je pomembno najti optimalen odnos med centrifugiranjem, ki zahteva najmanjšo možno dolžino, in čim lažjim ločevanjem faz po centrifugiranju.
Moreover, when defining the experimental conditions for the separation of soil/solution phases, it is important to consider the possible existence of a third ‘pseudo-phase’, the colloids.
Poleg tega je pri določanju eksperimentalnih pogojev za ločevanje faz tla/raztopina pomembno upoštevati morebiten obstoj tretje „psevdofaze“ – koloidov.
Thus, the information about their impact is lost.
Tako se informacije o njihovem vplivu izgubijo.
If the conducting laboratory has ultracentrifugation or ultrafiltration facilities, the adsorption/desorption of a substance in soil could be studied more in depth, including information on the adsorption of the substance on the colloids.
Če ima zadevni laboratorij možnost ultracentrifugiranja ali ultrafiltracije, je mogoče adsorpcijo/desorpcijo snovi v tleh proučiti bolj podrobno ter tako pridobiti tudi informacije o adsorpciji snovi na koloide.
In this case, an ultracentrifugation at 60000 rpm/min or an ultrafiltration with filter porosity of 100000 Daltons should be applied in order to separate the three phases soil, colloids, solution.
V tem primeru se izvede ultracentrifugiranje pri 60000 rpm/min ali ultrafiltracija s poroznostjo filtra 100000 Daltonov za ločitev treh faz – tal, koloidov in raztopine.
The test protocol should also be modified accordingly, in order all three phases to be subjected to substance analysis.
Tudi preskusni protokol se ustrezno prilagodi, da bodo vse tri faze analizirane.
Fig. 1a.
Slika 1a
Variations of centrifugation time (t) versus centrifugation speed (rpm) for different soil densities (ρs).
Spreminjanje časa centrifugiranja (t) v odvisnosti od hitrosti centrifugiranja (rpm) za različne gostote tal (ρs).
Rt = 10 cm, Rb - Rt = 10 cm, η = 8,95 × 10-3 g s-1 cm-1 and ρaq = 1,0 g. cm-3 at 25 oC.
Rt = 10 cm, Rb -Rt = 10 cm, η = 8,95 × 10-3g s-1cm-1 and ρaq = 1,0 g.cm-3 at 25 oC.
Fig. 1b.
Slika 1b.
Variations of centrifugation time (t) versus centrifugation speed (rpm) for different lengths of the mixture in the centrifuge tube (Rb - Rt) = L; Rt = 10 cm, η = 8,95 × 10-3 g s-1 cm-1, ρaq = 1,0 g. cm-3 at 25 oC and ρs = 2,0 g cm-3.
Spreminjanje časa centrifugiranja (t) v odvisnosti od hitrosti centrifugiranja (rpm) za različne dolžine zmesi v centrifugirki (Rb -Rt) = L; Rt = 10 cm, η = 8,95 x 10-3g s-1cm-1, ρaq = 1,0 g.cm-3 pri 25 oC in ρs = 2,0 g cm-3.
CALCULATION OF ADSORPTION A (%) AND DESORPTION D (%)
IZRAČUN ADSORPCIJE A ( %) IN DESORPCIJE D ( %)
The time scheme of the procedure is:
Časovna shema postopka je:
For all the calculations it is assumed that the test substance is stable and does not adsorb significantly to the container walls.
Pri vseh izračunih se predpostavlja, da je preskusna snov stabilna in da se bistveno ne adsorbira na stene posode.
ADSORPTION A (A%)
ADSORPCIJA A (A %)
Parallel method
Paralelna metoda
The percentage adsorption is calculated for each test tube (i) at each time point (ti), according to the equation:
Odstotek adsorpcije se izračuna za vsako epruveto (i) za vsak čas (ti) po enačbi:
The terms of this equation may be calculated as follows:
Elementi te enačbe se lahko izračunajo na naslednji način:
adsorption percentage ( %) at the time point ti
odstotek adsorpcije ( %) ob času ti;
mass of the test substance on soil at the time ti that the analysis is performed (μg)
masa preskusne snovi na tleh ob času ti, ko se opravi analiza (μg);
mass of test substance in the test tube, at the beginning of the test (μg)
masa preskusne snovi v epruveti na začetku preskusa (μg);
initial mass concentration of the test solution in contact with the soil (μg cm-3)
začetna masna koncentracija preskusne raztopine v stiku s tlemi (μg cm-3);
mass concentration of the substance in the aqueous phase at the time ti that the analysis is performed (μg cm-3); this concentration is analytically determined taking into account the values given by the blanks
masna koncentracija snovi v vodni fazi ob času ti, ko se izvaja analiza (μg cm-3); ta koncentracija se določi analitsko ob upoštevanju vrednosti, dobljenih s slepimi vzorci.
initial volume of the test solution in contact with the soil (cm3).
začetna prostornina preskusne raztopine v stiku s tlemi (cm3).
The values of the adsorption percentage Ati
Vrednosti odstotka adsorpcije Ati
are plotted versus time and the time after which the sorption equilibrium is attained is determined.
se prikažejo grafično v odvisnosti od časa in določi se čas, potreben za vzpostavitev sorpcijskega ravnotežja.
Examples of such plots are given in Fig. 1 and Fig. 2 respectively.
Primera takih grafov sta sliki 1 in 2.
Fig. 1.
Slika 1 Graf adsorpcijskega ravnotežja
Adsorption equilibrium plot
Odstotna adsorpcija Ati (%) Čas, potreben za vzpostavitev ravnotežja ti (h)
Concentration Cadsaq (µg cm-3) C0
Slika 2
Cadsaq (eq) Equilibration time ti (h)
Masna koncentracija preskusne snovi v vodni fazi (Caq) v odvisnosti od časa
Fig. 2.
Koncentracija Cadsaq (µm cm-3)
Mass concentration of the test substance in the aqueous phase (Caq) versus time
Cadsaq (eq) Čas, potreben za vzpostavitev ravnotežja ti (h)
Serial method
Serialna metoda
The following equations take into account that the adsorption procedure is carried out by measurements of the test substance in small aliquots of the aqueous phase at specific time intervals.
Naslednje enačbe upoštevajo, da se adsorpcij ski postopek izvaja z merjenjem preskusne snovi v majhnih alikvotnih delih vodne faze v točno določenih časovnih intervalih.
During each time interval the amount of the substance adsorbed on the soil is calculated as follows:
Za vsak časovni interval se količina snovi, adsorbirane na tla, izračuna po naslednjih enačbah:
for the first time interval Δt1 = t1 - t0
za prvi časovni interval Δti = t1– t0
for the second time interval Δt2 = t2 - t1
za drugi časovni interval Δt2 = t2 – t1
for the third time interval Δt3 = t3 - t2
za tretji časovni interval Δt3 = t3 – t2
for the nth time interval Δtn = tn - tn - 1
za n-ti časovni interval Δtn = tn – tn – 1
The percentage of adsorption at each time interval, AΔti
Odstotek adsorpcije za vsak časovni interval, AΔti
, is calculated using the following equation:
po naslednji enačbi:
while the percentage of adsorption Ati
odstotek adsorpcije Ati
at a time point ti is given by the equation:
ob času ti pa se izračuna po enačbi:
The values of the adsorption Ati
Vrednosti adsorpcije Ati
or AΔti
ali AΔti
(with respect to the needs of the study) are plotted versus time and the time after which the sorption equilibrium is attained is determined.
(glede na potrebe študije) se prikažejo grafično v odvisnosti od časa in določi se čas, potreben za vzpostavitev sorpcijskega ravnotežja.
At the equilibration time teq:
Ob času uravnoteženja teq:
the mass of the test substance adsorbed on the soil is:
je masa preskusne snovi, adsorbirane na tla:
the mass of the test substance in the solution is:
je masa preskusne snovi v raztopini:
and the percentage of adsorption at equilibrium is:
odstotek adsorpcije ob ravnotežju pa je:
The parameters used above are defined as:
Zgoraj uporabljeni parametri so:
mass of the substance adsorbed on the soil during the time intervals Δt1, Δt2,..., Δtn respectively (μg);
masa snovi, adsorbirane na tla v časovnih intervalih Δt1, Δt2,..., Δtn (μg);
mass of the substance measured in an aliquot va
masa snovi, izmerjena v alikvotu va
at the time points t1, t2,tn respectively (μg);
ob časih t1, t2, tn (μg);
volume of the aliquot in which the test substance is measured (cm3);
prostornina alikvota, v katerem se meri preskusna snov (cm3);
percentage of adsorption corresponding at a time interval Δti (%);
odstotek adsorpcije, ki ustreza časovnemu intervalu Δti ( %);
percentage of adsorption at adsorption equilibrium (%).
odstotek adsorpcije ob adsorpcijskem ravnotežju ( %).
DESORPTION D (A %)
DESORPCIJA D ( %)
The time t0 that the desorption kinetics experiment begins, is considered as the moment that the maximal recovered volume of the test substance solution (after that the adsorption equilibrium is attained) is replaced by an equal volume of 0,01 M CaCl2 solution.
Za čas t0, ko se začne poskus kinetike desorpcije, velja trenutek, ko se največja rekuperirana prostornina raztopine preskusne snovi (potem, ko je adsorpcijsko ravnotežje vzpostavljeno) nadomesti z enako prostornino 0,01 M raztopine CaCl2.
At a time point ti, the mass of the test substance is measured in the aqueous phase taken from the tube i (Vi
Ob času ti se masa preskusne snovi izmeri v vodni fazi, vzeti iz epruvete i (Vi
), and the mass desorbed is calculated according to the equation:
), desorbirana masa pa se izračuna po enačbi:
At desorption equilibrium ti = teq and therefore maq
Ob desorpcijskem ravnotežju je ti = teq in zato je maq
The mass of the test substance desorbed during a time interval (Δti) is given by the equation:
Masa preskusne snovi, desorbirane v nekem časovnem intervalu (Δti) se izračuna po enačbi:
The percentage of desorption is calculated:
Odstotek desorpcije se izračuna:
at a time point ti from the equation:
b času ti po enačbi:
and during a time interval (Δti) from the equation:
in za časovni interval (Δti) po enačbi:
desorption percentage at a time point ti (%)
odstotek desorpcije ob času ti ( %);
desorption percentage corresponding to a time interval Δti (%)
odstotek desorpcije, ki ustreza časovnemu intervalu Δti ( %);
mass of the test substance desorbed at a time point ti, (μg)
masa preskusne snovi, desorbirane ob času ti, (μg);
mass of the test substance desorbed during a time interval Δti (μg)
masa preskusne snovi, desorbirane v časovnem intervalu Δti (μg);
mass of the test substance analytically measured at a time ti in a solution volume Vr
masa preskusne snovi, analitsko izmerjena ob času ti v prostornini raztopine Vr
,which is taken for the analysis (μg)
, odvzeti za analizo (μg);
mass of the test substance left over from the adsorption equilibrium due to incomplete volume replacement (μg)
masa snovi, ki ostane od adsorpcijskega ravnotežja zaradi nepopolne nadomestitve prostornine (μg);
mass of the test substance in the solution at adsorption equilibrium (μg)
masa preskusne snovi v raztopini ob adsorpcijskem ravnotežju (μg);
volume of the supernatant removed from the tube after the attainment of adsorption equilibrium and replaced by the same volume of a 0,01 M CaCl2 solution (cm3)
prostornina supernatanta, odstranjenega iz epruvete po vzpostavitvi adsorpcijskega ravnotežja in nadomeščenega z enako prostornino 0,01 M raztopine CaCl2 (cm3);
volume of the solution taken from the tube (i) for the measurement of the test substance, in desorption kinetics experiment (cm3).
prostornina raztopine, vzete iz epruvete (i) za meritev preskusne snovi pri poskusu kinetike desorpcije (cm3).
The values of desorption Dti
Vrednosti desorpcije Dti
or DΔti
ali DΔti
(according to the needs of the study) are plotted versus time and the time after which the desorption equilibrium is attained is determined.
(glede na potrebe študije) se prikažejo grafično v odvisnosti od časa in določi se čas, potreben za vzpostavitev desorpcijskega ravnotežja.
The following equations take into account that the adsorption procedure, which was preceded, was carried out by measurement of test substance in small aliquots vA
Naslednje enačbe upoštevajo, da je bil predhodni adsorpcijski postopek izveden z merjenjem preskusne snovi v majhnih alikvotnih delih vA
of the aqueous phase (serial method in ‘Performance of the test’ 1,9).
vodne faze (serijska metoda pod 1.9 „Izvedba preskusa“).
It is assumed that: (a) the volume of the supernatant removed from the tube after the adsorption kinetics experiment was replaced by the same volume of 0,01 M CaCl2 solution (VR) and (b) and the total volume of the aqueous phase in contact with the soil (VT) during the desorption kinetics experiment remains constant and is given by the equation:
Predpostavlja se: (a) da je bila prostornina supernatanta, odstranjenega iz epruvete po preskusu kinetike adsorpcije, nadomeščena z enako prostornino 0,01 M raztopine CaCl2 (VR) in (b) da skupna prostornina vodne faze v stiku s tlemi (VT) med poskusom kinetike desorpcije ostane konstantna in se izračuna po enačbi:
At a time point ti:
Ob času ti:
The mass of the test substance is measured in a small aliquot va
se masa preskusne snovi izmeri v majhnem alikvotnem delu va
and the mass desorbed is calculated, according to the equation:
, desorbirana masa pa se izračuna po enačbi:
The percentage of desorption Dti
Odstotek desorpcije Dti
is calculated, from the following equation:
se izračuna po naslednji enačbi:
At a time interval (Δti):
Ob časovnem intervalu (Δti):
During each time interval the amount of the substance desorbed is calculated as follows:
Za vsak časovni interval se količina desorbirane snovi izračuna:
for the first time interval Δt1 = t1-t0
za prvi časovni interval Δt1 = t1 - t0
for the second time interval Δt2 = t2-t1
za drugi časovni interval Δt2 = t2-t1
for the nth interval Δtn = tn-tn-1
za n-ti časovni interval Δtn = tn-tn-1
Finally, the percentage of desorption at each time interval, DΔti
Nazadnje se izračuna odstotek desorpcije za vsak časovni interval DΔti
while the percentage of desorption Dti
odstotek desorpcije Dti
where the above used parameters are defined as:
pri čemer so zgoraj uporabljeni parametri:
mass of the substance remaining adsorbed on the soil after the time intervals Δt1, Δt2, ..., Δtn respectively (μg)
masa snovi, ki ostane adsorbirana v tleh po časovnih intervalih Δt1, Δt2,..., Δtn (μg);
mass of the test substance desorbed during the time intervals Δt1, Δt2, ..., Δtn respectively (μg)
masa preskusne snovi, desorbirane v časovnih intervalih Δt1, Δt2,..., Δtn (μg);
mass of the substance measured in an aliquot vD
masa snovi, izmerjene v alikvotu vD
at time points t1,t2, ..., tn, respectively (μg)
ob časih t1, t2,..., tn, (μg);
total volume of the aqueous phase in contact with the soil during the desorption kinetics experiment performed with the serial method (cm3)
skupna prostornina vodne faze v stiku s tlemi med poskusom kinetike desorpcije, izvedenem s serijsko metodo (cm3);
volume of the aliquot sampled for analytical purpose from the tube (i), during the desorption kinetics experiment performed with the serialmethod (cm3)
prostornina alikvota, odvzetega iz epruvete (i) za namen analize med poskusom kinetke desorpcije, izvedenim s serijsko metodo (cm3);
Appendix 6
DODATEK 6
ADSORPTION-DESORPTION IN SOILS: DATA REPORTING SHEETS
ADSORPCIJA/DESORPCIJA V TLEH: LISTI ZA POROČANJE PODATKOV
Substance tested:
Preskušana snov:
Soil tested:
Preskušan tip tal:
Dry mass content of the soil (105 oC, 12h): … %
Vsebnost suhe mase v tleh (105 oC, 12 h): … %
Temperature: … oC
Temperatura: … oC
Suitability of the analytical method
Primernost analitske metode
Weighed soil
Masa tal
Soil: dry mass
Tla: suha masa
Volume CaCl2 sol.
Prostornina raztopine CaCl2
Nominal conc. final sol.
Nominalna koncentracija končne razopine
Analytical conc. final sol.
Analitska koncentracija končne razopine
Principle of the analytical method used:
Princip uporabljene analitske metode:
Calibration of the analytical method:
Umerjanje analitske metode:
Soil tested
Preskušan tip tal:
Dry mass content of the soil (105 oC, 12 h): … %
Vsebnost suhe mase v tleh (105 oC, 12 h): … %
Analytical methodology followed:
Uporabljena metodologija:
Indirect
analitska Posredna
Parallel
Paralelna
Serial
Serialna
Direct
Neposredna
Adsorption test: test samples
Preskus adsorpcije: preskusni vzorci
Equilibration time
Čas potreben za vzpostavitev ravnotežja
Tube No
Št. epruvete
Water volume in weighed soil (calculated)
Prostornina vode v zatehtanih tleh (izračunana)
Volume 0,01 M CaCl2 sol. to equilibrate the soil
Prostornina 0,01 M raztopine CaCl2 za vzpostavitev ravnotežja vtleh
Volume of stock solution
Prostornina osnovne raztopine
Total volume of aq. phase in contact with soil
Skupna prostornina vodne faze v stiku s tlemi
Initial concentration Test solution
Začetna koncentracija preskusne raztopine
Mass test subst. at the beginning of the test
Masa preskusne snovi na začetku preskusa
After agitation and centrifugation
Po stresanju in centrifugiranju
INDIRECT METHOD
NEPOSREDNA METODA
Concentration test subst. aq. phase Blank correction included
Koncentracija preskusne snovi v vodni fazi, vključno s korekcijo za vrednost slepega vzorca
Measured mass test subst. in the aliquot VaA
Masa preskusne snovi, izmerjena v alikvotu VAa
DIRECT METHOD
NEPOSREDNA METODA
Mass test substance adsorbed on soil
Masa preskusne snovi adsorbirane v tleh
Calculation of adsorption
Izračun adsorpcije
Means
Srednje velikosti
Adsorption coefficient
Adsorpcijski koeficient
Adsorption test: blanks and control
Preskus adsorpcije: slepi vzorci in kontrola
Weighed soils
Masa tal
Water amount in weighed soil (calculated)
Prostornina vode v zatehtanih tleh (izračunana)
Volume of 0,01 M CaCl2 solution added
Prostornina 0,01 M raztopine CaCl2 za vzpostavitev ravnotežja v tleh
Volume of the stock solution of the test substance added
Prostornina osnovne raztopine
Total volume of aq. phase (calculated)
Skupna prostornina vodne faze v stiku s tlemi
Initial concentration of the test substance in aqueous phase
Začetna koncentracija preskusne snovi v vodni fazi
Concentration in aqueous phase
Koncentracija v vodni fazi
Remark: add columns if necessary
Opomba: Po potrebi dodajte stolpce
Dry mass content of the soil (105 oC 12 h): … %
V sebnost suhe mase v tleh (105 oC 12 h): … %
Initial concentration test solution
Začetna koncentracija preskusne raztopine
Concentr. test subst. aq. phase at adsorption equilibrium blank correction included
Koncentracija preskusne snovi v vodni fazi ob adsorpcijskem ravnotežju, vključno s korekcijo za vrednost slepega vzorca
Equalibration time
Čas uravnoteženja
dilution with solvent
Drugo redčenje s topilom
Removed volume aq. phase
Odstranjena prostornina vodne faze
Added volume of solvent
Dodana prostornina topila
extraction with solvent
Druga ekstrakcija s topilom
Signal analysed in solvent
Signal, analiziran v topilu
Conc. test subst. in solvent
Koncentracija preskusne snovi v topilu
Mass of substance extracted from soil and vessel walls
Masa snovi, ekstrahirane iz tal in sten posode
Removed volume of solvent
Odstranjena prostornina topila
Signal analysed in solvent phase
Signal, analiziran v fazi topila
Total mass test subst. extracted in two steps
Skupna masa preskusne snovi, ekstrahirana v dveh kroakih
Volume of stock solution added
Prostornina dodane osnovne raztopine
Total volume of aq. phase in contact with soil (calculated)
Skupna prostornina vodne faze v stiku s tlemi (izračunana)
Concentration solution
Koncentracija raztopine
Concentration subst. aq. phase, blank correction included
Koncentracija snovi v vodni fazi, vkljulno s korekcijo za vrednost slepega vzorca
Adsorb. mass per unit soil
Adsorbirana masa na enoto tal
Regression analysis:
Regresijska analiza:
value of KFads:
vrednost KadsF :
value of l/n:
vrednost l/n:
regression coefficient r2:
regresijski koeficient r2:
Desorption test
Preskus desorpcije
Time interval
Časovni interval
Tube No coming from adsorption step
Št. epruvete iz faze adsorpcije
Mass of substance adsorbed on soil at adsorption equilibrium
Masa snovi, adsorbirane na tla v adsorpcijskem ravnotežju
Removed volume aq. phase, replaced by 0,01 M CaCl2
Odstranjena prostornina vodne faze, nadomeščena z 0,01 M CaCl2
Mass test subst. left over the adsorption equilibrium due to incomplete volume replacement
Masa preskusne snovi, ki ostane od adsorpcijskega ravnotežja zaradi nepopolne nadomestitve prostornine
Measured mass of substance desorbed from soil at time ti
Izmerjena masa snovi, desorbirane s tal ob času ti
Volume of the solution taken from the tube (i) for the measurement of the test substance
Prostornina raztopine, vzete iz epruvete (i) za meritev preskusne snovi
Mass of substance desorbed from soil at time ti (calculated)
Masa snovi, desorbirane s tal ob času ti (izračunana)
Mass of substance desorbed from soil during time interval Δti (calculated)
Masa snovi, desorbirane s tal v časovnem intervalu Δti (izračunana)
Desorption percentage
Odstotek desorpcije
Desorption at time ti
Desorpcija ob časuti
Desorption at time interval Δti
Desorpcija v časovnem intervalu Δti
Apparent desorption coefficient
Desorpcijski koeficient
parallel method
PM: Paralelna metoda
serial method
SM: Serialna metoda
This method is a replicate of OECD TG121 (2001).
Ta metoda ustreza metodi OECD TG121 (2001).
The sorption behaviour of substances in soils or sewage sludges can be described through parameters experimentally determined by means of the test method C.18.
Sorptivno obnašanje snovi v tleh ali odpadnem blatu iz čistilnih naprav lahko opišemo s parametri, ki se eksperimentalno ugotovijo s preskusno metodo C.18.
An important parameter is the adsorption coefficient which is defined as the ratio between the concentration of the substance in the soil/sludge and the concentration of the substance in the aqueous phase at adsorption equilibrium.
Eden od pomembnih parametrov je adsorpcijski koeficient, ki je opredeljen kot razmerje med koncentracijo snovi v tleh/blatu in koncentracijo snovi v vodni fazi ob adsorpcijskem ravnotežju.
The adsorption coefficient normalised to the organic carbon content of the soil Koc is a useful indicator of the binding capacity of a chemical on organic matter of soil and sewage sludge and allows comparisons to be made between different chemicals.
Adsorpcijski koeficient, normiran na vsebnost organskega ogljika v tleh (Koc), je koristen pokazatelj sposobnosti vezave kemikalije na organske snovi v tleh in odpadnem blatu ter omogoča primerjavo med različnimi kemikalijami.
This parameter can be estimated through correlations with the water solubility and the n-octanol/water partition coefficient (1)(2)(3)(4)(5)(6)(7).
Ta parameter je mogoče oceniti prek korelacije s topnostjo v vodi in porazdelitvenim koeficientom n-oktanol/voda (1) (2) (3) (4) (5) (6) (7).
The experimental method described in this test uses HPLC for the estimation of the adsorption coefficient Koc in soil and in sewage sludge (8).
Eksperimentalna metoda, opisana v tem preskusu, uporablja HPLC za ocenitev adsorpcijskega koeficienta Koc v tleh in odpadnem blatu (8).
The estimates are of higher reliability than those from QSAR calculations (9).
Dobljene vrednosti so bolj zanesljive kot tiste, izračunane z metodo QSAR (9).
As an estimation method it cannot fully replace batch equilibrium experiments used in the test method C18.
Kot ocenjevalna metoda ne more popolnoma nadomestiti šaržnih preskusov ravnotežja, ki se uporabljajo v preskusni metodi C.18.