natgillin/translations-raw huggingface dataset:
Clarify using Carrez solutions I (3.3) and II (3.4), make up to volume with water, mix, filter and measure the optical rotation as indicated in the 2nd and 3rd paragraphs of 5.2.
Za zbistritev se uporabita raztopini Carrez I (3.3.) in II (3.4), dopolni se z vodo do oznake, premeša in filtrira, nato pa se izmeri optična rotacija, kakor je navedeno v drugem in tretjem odstavku točke 5.2.
The starch content (%) is calculated as follows:
Vsebnost škroba (%) se izračuna na naslednji način:
Measurement by polarimeter
meritve s polarimetrom
Starch content (%) =2 000P-P'
Teneur en amidon (%) =2 000P-P'
P Total optical rotation in angle degrees
P celotna optična rotacija v kotnih stopinjah;
P ' Optical rotation in angle degrees of the substances soluble in 40 % (V/V) ethanol
P ' optična rotacija snovi, ki so topne v 40-odstotnem (V/V) etanolu, v kotnih stopinjah;
Specific optical rotation of pure starch.
specifična optična rotacija čistega škroba.
The numerical values conventionally accepted for this factor are the following:
Vrednosti, D ki se ponavadi uporabljajo za ta faktor, so:
rice starch
rižev škrob;
potato starch
krompirjev škrob;
maize starch
koruzni škrob;
wheat starch
pšenični škrob;
barley starch
ječmeni škrob;
oat starch
ovseni škrob;
other types of starch and starch mixtures in compound feed
druge vrste škroba in škrobnih mešanic v krmnih mešanicah.
Measurement by saccharimeter
meritve s saharimetrom
Starch content (%) =2 000
Teneur en amidon (%)=2 000
S Total optical rotation in saccharimeter degrees
S celotna optična rotacija v stopinjah saharimetra;
S ' Optical rotation in saccharimeter degrees of the substances soluble in 40 % (v/v) ethanol
S ' optična rotacija snovi, ki so topne v 40-odstotnem (v/v) etanolu, v stopinjah saharimetra;
N weight (g) of saccharose in 100 ml of water yielding an optical rotation of 100 saccharimeter degrees when measured using a 200 mm tube
N masa (g) saharoze v 100 ml vode, pri kateri je optična rotacija 100 saharimetrskih stopinj, kadar se meri z uporabo 200-milimetrske epruvete;
16,29 g for the French saccharimeters
16,29 g za francoske saharimetre;
26,00 g for the German saccharimeters
26,00 g za nemške saharimetre;
20,00 g for mixed saccharimeters.
20,00 g za mešane saharimetre;
Specific optical rotation of pure starch (see 6.1)
specifična optična rotacija čistega škroba (glej 6.1).
The difference between the results of two parallel determinations carried out on the same sample must not exceed 0,4 in absolute value for a starch content lower than 40 % and 1 % relative for starch contents equal to or greater than 40 %.
Razlika med rezultatoma dveh vzporednih določanj, izvedenih na istem vzorcu, ne sme presegati 0,4 absolutne vrednosti za vsebnost škroba, ki je nižja od 40 %, in 1 % relativne vrednosti za vsebnost škroba, ki je enaka ali višja od 40 %.
If the sample contains more than 6 % of carbonates, calculated in terms of calcium carbonate, they must be destroyed by treatment with an exactly appropriate quantity of dilute sulphuric acid before determination of the total optical rotation.
Če vzorec vsebuje več kot 6 % karbonatov, izračunanih v obliki kalcijevega karbonata, se jih mora pred določanjem celotne optične rotacije razkrojiti z obdelavo z natančno primerno količino razredčene žveplove kisline.
Leave to cool and continue the analysis as indicated in 5.3.
Pusti se, da se ohladi, in nadaljuje z analizo, kakor je navedeno v točki 5.3.
The following feed materials, where they are present in significant amounts in feed, are known to give rise to interferences when determining the starch content by the polarimetric method and thereby incorrect results could be yielded:
Naslednja posamična krmila, kadar so prisotna v znatni količini v krmi, povzročajo motnje pri določanju vsebnosti škroba s polarimetrično metodo, zaradi česar so lahko rezultati nepravilni:
(sugar) beet products such as (sugar)beet pulp, (sugar) beet molasses, (sugar) beet pulp — molassed, (sugar) beet vinasse, (beet) sugar,
proizvodi iz (sladkorne) pese, kot so pulpa (sladkorne) pese, melasa (sladkorne) pese, melasirana pulpa (sladkorne) pese, usedlina pri destilaciji (sladkorne) pese, (pesni) sladkor,
citrus pulp,
pulpa agrumov,
linseed; linseed expeller; linseed extracted,
laneno seme; laneno seme z nižjo vsebnostjo maščobe; ekstrahirano laneno seme,
rape seed; rape seed expeller; rape seed extracted; rape seed hulls,
seme oljne ogrščice; oljna ogrščica z nižjo vsebnostjo maščobe; ekstrakt oljne ogrščice; luščine oljne ogrščice,
sunflower seed; sunflower seed extracted; sunflower seed, partially decorticated, extracted,
sončnično seme; ekstrahirano sončnično seme; sončnično seme, delno oluščeno, ekstrahirano,
copra expeller; copra extracted,
kopra z nižjo vrednostjo maščobe; ekstrakt kopre,
potato pulp,
krompirjeva pulpa,
dehydrated yeast,
suhi kvas,
products rich in inulin (e.g. Chips and meal of Jerusalem artichokes),
proizvodi z visoko vsebnostjo inulina (npr. koščki in moka topinamburja),
DETERMINATION OF CRUDE ASH
DOLOČANJE SUROVEGA PEPELA
This method makes it possible to determine the crude ash content of feed.
Ta metoda omogoča določanje vsebnosti surovega pepela v krmi.
The sample is ashed at 550 oC; the residue is weighed.
Vzorec se upepeli pri 550 oC; ostanek se stehta.
Ammonium nitrate, solution 20 % (w/v).
Amonijev nitrat, 20-odstotna raztopina (m/v)
Hot-plate.
Grelna plošča
Electric muffle-furnace with thermostat.
Električna žarilna peč s termostatom
Crucibles for ashing made of silica, porcelain or platinum either rectangular (approx. 60 × 40 × 25 mm) or circular (diameter: 60 to 75 mm, height: 20 to 40 mm).
Žarilni lončki za upepeljevanje iz kremena, porcelana ali platine, pravokotni (približno 60 × 40 × 25 mm) ali okrogli (premer: 60 do 75 mm, višina: 20 do 40 mm)
Weigh out to the nearest mg approximately 5 g of the sample (2,5 in the case of products which have a tendency to swell) and place in a crucible for ashing which has first been heated at 550 oC, cooled down and tared.
Približno 5 g vzorca se natehta na 1 mg natančno (2,5 g pri proizvodih, ki lahko nabreknejo) in prenese v žarilni lonček za upepelitev, ki se predhodno segreje na 550 oC, ohladi in tarira.
Place the crucible on the hot-plate and heat gradually until the substance carbonises.
Lonček se postavi na grelno ploščo in postopoma segreva, da snov zogleni.
Ash according to 5.1 or 5.2.
Upepeli se v skladu s točko 5.1 ali 5.2.
Put the crucible into the calibrated muffle furnace set at 550 oC.
Lonček se postavi v žarilno peč, segreto na 550 oC.
Keep at this temperature until white, light grey or reddish ash is obtained which appears to be free from carbonaceous particles.
Pri tej temperaturi se pusti, dokler ne nastane bel, svetlosiv ali rdečkast pepel, ki je videti, da ne vsebuje ogljikovih delcev.
Place the crucible in a desiccator, leave to cool and weigh immediately.
Lonček se postavi v eksikator, pusti se, da se ohladi, in takoj stehta.
Put the crucible into the calibrated muffle-furnace set at 550 oC.
Lonček se postavi v žarilno peč, segreto na 550 oC.
Ash for 3 hours.
V peči se pusti 3 ure.
Ash again for 30 minutes to ensure that the weight of the ash remains constant (loss in weight between two successive weightings must be less than or equal to 1 mg).
Ponovno se postavi v žarilno peč za 30 minut, pri čemer mora biti masa pepela konstantna (izguba mase med dvema zaporednima tehtanjema ne sme presegati 1 mg).
Calculate the weight of the residue by deducting the tare.
Masa ostanka se izračuna tako, da se odšteje tara.
The ash of substances which are difficult to ash must be subjected to an initial ashing of at least three hours, cooled and then a few drops of 20 % solution of ammonium nitrate or water added to it (carefully, to avoid dispersal of the ash or the formation of lumps).
Snovi, ki se težko upepelijo, je treba najprej najmanj tri ure upepeljevati, nato ohladiti in jim dodati nekaj kapljic 20-odstotne raztopine amonijevega nitrata ali vode (pazljivo, da se pepel ne razprši ali da ne nastanejo grude).
Continue calcining after drying in the oven.
Po sušenju v sušilniku se nadaljuje z žarjenjem.
Repeat the operation as necessary until ashing is complete.
Postopek se po potrebi ponovi, dokler upepelitev ni popolna.
In the case of substances resistant to the treatment described under 7.1, proceed as follows: after ashing for three hours, place the ash in warm water and filter through a small, ash-free filter.
Pri snoveh, ki so odporne na obdelavo iz točke 7.1, se nadaljuje na naslednji način: po triurni upepelitvi se pepel prenese v vročo vodo in filtrira skozi majhen filter brez pepela.
Ash the filter and its contents in the original crucible.
Filter in njegova vsebina se upepelita v istem lončku.
Place the filtrate in the cooled crucible, evaporate until dry, ash and weigh.
Filtrat se prenese v ohlajen lonček, upari do suhega, upepeli in stehta.
In the case of oils and fats, weigh accurately a sample of 25 g in a suitably sized crucible.
Pri oljih in maščobah se 25 g vzorca natančno natehta v lonček primerne velikosti.
Dry and ash as described under 5.
Osuši in upepeli se, kakor je opisano v točki 5.
DETERMINATION OF ASH WHICH IS INSOLUBLE IN HYDROCHLORIC ACID
DOLOČANJE PEPELA, NETOPNEGA V KLOROVODIKOVI KISLINI
This method makes it possible to determine the level in feed of mineral substances which are insoluble in hydrochloric acid.
Ta metoda omogoča določanje ravni mineralnih snovi v krmi, netopnih v klorovodikovi kislini.
Two methods can be used, depending on the nature of the sample.
Glede na naravo vzorca se lahko uporabljata dve metodi.
Method A: applicable to organic feed materials and to most compound feed.
Metoda A: uporablja se za organska posamična krmila in za večino krmnih mešanic;
Method B: applicable to mineral compounds and mixtures and to compound feed, whose content in substances insoluble in hydrochloric acid, as determined by Method A, is greater than 1 %.
Metoda B: uporablja se za mineralne krmne mešanice in krmne mešanice, ki vsebujejo več kot 1 % snovi, netopnih v klorovodikovi kislini in določenih po metodi A.
Method A: the sample is ashed, the ash boiled in hydrochloric acid and the insoluble residue filtered and weighed.
Metoda A: vzorec se upepeli, pepel se raztopi v vreli klorovodikovi kislini, netopni ostanek pa filtrira in stehta.
Method B: the sample is treated with hydrochloric acid.
Metoda B: vzorec se obdela s klorovodikovo kislino.
The solution is filtered, the residue ashed and the ash thus obtained treated in accordance with Method A.
Raztopina se filtrira, ostanek se upepeli, tako dobljeni pepel pa se obdela v skladu z metodo A.
Hydrochloric acid 3 mol/litre.
Klorovodikova kislina, 3 mol/l
Trichloroacetic acid, solution 20 % solution (w/v).
Trikloroocetna kislina, 20-odstotna raztopina (m/v)
Trichloroacetic acid, solution 1 % (w/v).
Trikloroocetna kislina, 1-odstotna raztopina (m/v)
Hot plate.
Grelna plošča
Crucibles for ashing made of silica, porcelain or platinum, either rectangular (approx. 60 × 40 × 25 mm) or circular (diameter: 60 to 75 mm, height: 20 to 40 mm).
Žarilni lončki za upepeljevanje iz kremena, porcelana ali platine, pravokotni (približno 60 × 40 × 25 mm) ali okrogli (premer: 60 do 75 mm, višina: 20 do 40 mm)
Ash the sample using the method described for the determination of crude ash.
Vzorec se upepeli po metodi za določanje surovega pepela.
Ash obtained from that analysis may also be used.
Lahko se uporabi pepel, dobljen pri navedeni analizi.
Place the ash in a 250 to 400 ml beaker using 75 ml of hydrochloric acid (3.1).
Pepel se prenese v 250- do 400-mililitrsko čašo s 75 ml klorovodikove kisline (3.1).
Bring slowly to the boil and boil gently for 15 minutes.
Počasi se segreje do vretja in pusti rahlo vreti petnajst minut.
Filter the warm solution through an ash-free filter paper and wash the residue with warm water until the acid reaction is no longer visible.
Topla raztopina se filtrira skozi filtrirni papir brez pepela, ostanek pa se spira s toplo vodo, dokler kisla reakcija ne preneha.
Dry the filter containing the residue and ash in a tared crucible at a temperature of not less than 550 oC and not more than 700 oC.
Filter z ostankom in pepelom se posuši v tariranem žarilnem lončku pri 550–700 oC.
Cool in a desiccator and weigh.
Ohladi se v eksikatorju in stehta.
Weigh 5 g of the sample to the nearest mg and place in a 250 to 400 ml beaker.
5 g vzorca se natehta na 1 mg natančno in prenese v 250- do 400-mililitrsko čašo.
Add 25 ml of water and 25 ml of hydrochloric acid (3.1) successively, mix and wait for effervescence to cease.
Doda se 25 ml vode in nato 25 ml klorovodikove kisline (3.1), premeša se, nato pa se počaka, da se reakcija umiri.
Add a further 50 ml of hydrochloric acid (3.1).
Doda se še 50 ml klorovodikove kisline (3.1).
Wait for any release of gas to cease then place the beaker in a boiling water bath and keep it there for 30 minutes or longer, if necessary, in order to hydrolyse thoroughly any starch which may be present.
Počaka se, da se preneha izločati plin, nato pa se čaša postavi v vrelo vodno kopel za 30 minut ali po potrebi dlje, da se popolnoma hidrolizira kakršen koli škrob, ki je lahko prisoten.
Filter while warm through an ash-free filter and wash the filter in 50 ml of warm water (see observation 7).
Vsebina, ki je še topla, se filtrira skozi filter brez pepela, filter pa se spere s 50 ml tople vode (glej opombo 7).
Place the filter containing the residue in a crucible for ashing, dry and ash at a temperature of not less than 550 oC and not more than 700 oC.
Filter, ki vsebuje ostanek, se prenese v žarilni lonček, posuši in upepeli pri 550–700 oC.
Place the ash in a 250 to 400 ml beaker using 75 ml of hydrochloric acid (3.1); continue as described in the second subparagraph of 5.1.
Pepel se prenese v 250- do 400-mililitrsko čašo s 75 ml klorovodikove kisline (3.1); nadaljuje se, kakor je opisano v drugem pododstavku točke 5.1.
If filtration proves difficult recommence the analysis, replacing the 50 ml of hydrochloric acid (3.1) by 50 ml of 20 % trichloroacetic acid (3.2) and washing the filter in a warm solution of 1 % trichloroacetic acid (3.3).
Če pri filtriranju nastopijo težave, se analiza ponovi, pri čemer se 50 ml klorovodikove kisline (3.1) nadomesti s 50 ml 20-odstotne trikloroocetne kisline (3.2), filter pa se spere s toplo raztopino 1-odstotne trikloroocetne kisline (3.3).
DETERMINATION OF CARBONATES
DOLOČANJE KARBONATOV
This method makes it possible to determine the amount of carbonates, conventionally expressed as calcium carbonate, in most feed.
Ta metoda omogoča določanje količine karbonatov v večini krme, ponavadi izraženih kot kalcijev karbonat.
However in certain cases (for example, with iron carbonate) a special method must be used.
Vendar je treba v nekaterih primerih (na primer pri železovem karbonatu) uporabiti posebna metoda.
The carbonates are decomposed in hydrochloric acid; the carbon dioxide released is collected in a graduated tube, and its volume compared with that released under the same conditions by a known quantity of calcium carbonate.
Karbonati se razkrojijo s klorovodikovo kislino; sproščeni ogljikov dioksid se zbere v bireto, nastala prostornina pa se primerja s prostornino, ki se pod istimi pogoji sprosti iz znane količine kalcijevega karbonata.
Hydrochloric acid, density 1,10 g/ml.
Klorovodikova kislina, gostota 1,10 g/ml
Calcium carbonate.
Kalcijev karbonat
Sulphuric acid, approximately 0,05 mol/litre, coloured with methyl red.
Žveplova kislina, približno 0,05 mol/l, obarvana z metil rdečim
Scheibler-Dietrich apparatus (see diagram) or equivalent apparatus.
Scheibler-Dietrichova naprava (glej sliko) ali ustrezna druga naprava
According to the sample's carbonate content, weigh a portion of the sample as shown below:
Glede na vsebnost karbonata v vzorcu se natehta del vzorca, kakor je navedeno spodaj:
0,5 g for products containing from 50 % to 100 % of carbonates, expressed as calcium carbonate,
0,5 g pri proizvodih, ki vsebujejo 50–100 % karbonatov, izraženih kot kalcijev karbonat,
1 g for products containing from 40 % to 50 % of carbonates, expressed as calcium carbonate,
1 g pri proizvodih, ki vsebujejo 40–50 % karbonatov, izraženih kot kalcijev karbonat,
2 to 3 g for other products.
2 do 3 g za druge proizvode.
Place the portion of the sample in the special flask (4) of the apparatus, fitted with a small tube of unbreakable material containing 10 ml of hydrochloric acid (3.1), and connect the flask to the apparatus.
Natehtani del vzorca se prenese v posebno bučko (4) naprave, povezano z majhno epruveto iz nezdrobljivega materiala, ki vsebuje 10 ml klorovodikove kisline (3.1), bučka pa se poveže z napravo.
Turn the three-way cock (5) so that the tube (1) connects with the outside.
Trojni petelinček (5) se obrne tako, da je bireta (1) odprta navzven.
Using the mobile tube (2), which is filled with coloured sulphuric acid (3.3) and connected to the graduated tube (1), bring the level of the liquid up to the zero mark.
S pomočjo pomične cevi (2), napolnjene z obarvano žveplovo kislino (3.3) in povezane z bireto (1), se nivo tekočine uravna na oznako nič.
Turn the cock (5) in order to connect up tubes (1) and (3) and check that the level is at zero.
Petelinček (5) se obrne tako, da se bireta (1) in cev (3) povežeta, nato pa se preveri, ali je raven na oznaki nič.
Run the hydrochloric acid (3.1) slowly over the portion of the sample, tilting the flask (4).
Z nagibanjem bučke (4) se klorovodikova kislina (3.1) počasi spušča prek vzorca.
Make the pressure equal by lowering the tube (2).
Tlaka se izenačita tako, da se cev (2) spušča.
Shake the flask (4) until the release of carbon dioxide has stopped completely.
Bučka (4) se stresa, dokler se ogljikov dioksid popolnoma ne preneha izločati.
Restore pressure by bringing the liquid back to the same level in tubes (1) and (2).
Tlaka se izenačita tako, da se izenačita ravni tekočin v bireti (1) in cevi (2).
After a few minutes, when the volume of gas has become constant, take the reading.
Rezultat se odčita po nekaj minutah, ko se volumen plina ustali.
Carry out a control test in the same conditions on 0,5 g of calcium carbonate (3.2).
Pod enakimi pogoji se izvede kontrolni preskus z 0,5 g kalcijevega karbonata (3.2).
The content of carbonates, expressed as calcium carbonate, is calculated by using the formula:
Vsebnost karbonatov, izraženih kot kalcijev karbonat, se izračuna po naslednji formuli:
X % (w/w) of carbonates in the sample, expressed as calcium carbonate
X % (m/m) karbonatov v vzorcu, izraženih kot kalcijev karbonat;
V ml of CO2 released by the portion of the sample.
V ml sproščenega CO2 iz dela vzorca;
ml of CO2 released by 0,5 g of CaCO3.
ml sproščenega CO2 iz 0,5 g CaCO3;
m weight, in grammes, of the portion of the sample.
m masa dela vzorca v gramih.
When the portion of the sample weighs more than 2 g, first place 15 ml of distilled water in the flask (4) and mix before beginning the test.
Ko je masa dela vzorca večja od 2 g, se najprej v bučko (4) nalije 15 ml destilirane vode in se pred začetkom preskusa premeša.
Use the same volume of water for the control test.
Enaka količina vode se uporabi za kontrolni preskus.
If the apparatus used has a different volume from that of the Scheibler-Dietrich apparatus, the portions taken from the sample and from the control substance and the calculation of the results must be adapted accordingly.
Če se volumen naprave, ki se uporablja, razlikuje od volumna Scheibler-Dietrichove naprave, je treba ustrezno prilagoditi količino dela vzorca in kontrolne snovi ter izračun rezultata.
SCHEIBER-DIETRICH APPARATUS FOR THE DETERMINATION OF CO2
SCHEIBLER-DIETRICHOVA NAPRAVA ZA DOLOITEV CO2
(measured in mm)
(izmerjeno v mm)
DETERMINATION OF TOTAL PHOSPHORUS
DOLOČANJE CELOTNEGA FOSFORJA
PHOTOMETRIC METHOD
FOTOMETRIČNA METODA
This method makes it possible to determine the content of total phosphorus in feed.
Ta metoda omogoča določanje celotne vsebnosti fosforja v krmi.
It is particularly appropriate for the analysis of products low in phosphorus.
Zlasti primerna je za analizo proizvodov z nizko vsebnostjo fosforja.
In certain cases (product rich in phosphorus), a gravimetric method may be used.
V nekaterih primerih (pri proizvodih, ki vsebujejo veliko fosforja) se lahko uporabi gravimetrična metoda.
The sample is mineralised, either by dry combustion (in the case of organic feed) or by acid digestion (in the case of mineral compounds and liquid feed), and placed in an acid solution.
Vzorec se mineralizira s suhim sežigom (pri organski krmi) ali z raztapljanjem s kislino (pri mineralnih mešanicah in tekoči krmi) ter prenese v kislo raztopino.
The solution is treated with molybdovanadate reagent.
Raztopini se doda molibdovanadatni reagent.
The optical density of the yellow solution thus formed is measured in a spectrophotometer at 430 nm.
Optična gostota rumene raztopine, ki pri tem nastane, se meri s spektrofotometrom pri 430 nm.
Hydrochloric acid, ρ20 = 1,10 g/ml (approx 6 mol/litre).
Klorovodikova kislina, ρ20 = 1,10 g/ml (približno 6 mol/l)
Nitric acid, ρ20 = 1,045 g/ml.
Dušikova kislina, ρ20 = 1,045 g/ml
Nitric acid, ρ20 = 1,38 to 1,42 g/ml.
Dušikova kislina, ρ20 = 1,38 do 1,42 g/ml
Molybdovanadate reagent: mix 200 ml of ammonium heptamolybdate solution (3.6.1), 200 ml of ammonium monovanadate solution (3.6.2) and 134 ml of nitric acid (3.4) in a 1 litre graduated flask.
Molibdovanadatni reagent: v litrski merilni bučki se zmeša 200 ml raztopine amonijevega heptamolibdata (3.6.1), 200 ml raztopine amonijevega monovanadata (3.6.2) in 134 ml dušikove kisline (3.4).
Make up to volume with water.
Dopolni se z vodo do oznake.
Ammonium heptamolybdate solution: dissolve in hot water 100 g of ammonium heptamolybdate (NH4) 6Mo7O24·4H2O.
Raztopina amonijevega heptamolibdata: v vroči vodi se raztopi 100 g amonijevega heptamolibdata ((NH4) 6Mo7O24×4H2O).
Add 10 ml of ammonia (density 0,91 g/ml) and make up to 1 litre with water.
Doda se 10 ml amonijaka (gostota 0,91 g/ml) in dopolni z vodo do 1 litra.
Ammonium monovanadate solution: dissolve 2,35 g of ammonium monovanadate NH4VO3 in 400 ml of hot water.
Raztopina amonijevega monovanadata: v 400 ml vroče vode se raztopi 2,35 g amonijevega monovanadata (NH4VO3).
Stirring constantly, slowly add 20 ml of dilute nitric acid (7 ml of HNO3 (3.4) + 13 ml of H2O and make up to 1 litre with water.
Med neprestanim mešanjem se počasi doda 20 ml razredčene dušikove kisline (7 ml HNO3 (3.4) + 13 ml H2O) in dopolni z vodo do 1 litra.
Standard solution of 1 mg phosphorus per ml: dissolve 4,387 g of potassium dihydrogen phosphate KH2PO4 in water.
Standardna raztopina 1 mg fosforja na ml: v vodi se raztopi 4,387 g kalijevega dihidrogen fosfata (KH2PO4).
Silica, porcelain or platinum ashing crucibles.
Žarilni lončki iz kremena, porcelana ali platine
Electric muffle-furnace with thermostat set at 550 oC.
Električna žarilna peč s termostatom, nastavljenim na 550 oC
250 ml Kjeldahl flask.
250-mililitrska Kjeldahlova bučka
Graduated flasks and precision pipettes.
Merilne bučke in precizijske pipete
Test tubes about 16 mm in diameter, with stoppers graded to a diameter of 14,5 mm; capacity: 25 to 30 ml.
Epruvete premera približno 16 mm, z brušenimi zamaški premera 14,5 mm, volumna 25–30 ml
Preparation of the solution
Priprava raztopine
According to the nature of the sample, prepare a solution as indicated in 5.1.1 or 5.1.2.
Glede na naravo vzorca se raztopina pripravi, kakor je navedeno v točki 5.1.1 ali 5.1.2.
Usual procedure
Standardni postopek
Weigh 1 g or more of the sample to the nearest 1 mg.
1 g vzorca ali več se natehta na 1 mg natančno.
Repeat this procedure until a colourless solution is obtained.
Postopek se ponavlja do nastanka brezbarvne raztopine.
Cool, add a little water, decant the liquid into a 500 ml graduated flask, rinsing the Kjeldahl flask with hot water.
Ohladi se, doda nekaj vode, tekočina se prelije v 500-mililitrsko merilno bučko, Kjeldahlova bučka pa se spere z vročo vodo.
Leave to cool, make up to volume with water, homogenise and filter.
Pusti se, da se ohladi, dopolni se z vodo do oznake, homogenizira in filtrira.
Samples containing organic substances and free from calcium and magnesium dihydrogen phosphates
Vzorci, ki vsebujejo organske snovi in ne vsebujejo kalcijevih in magnezijevih dihidrogen fosfatov