The
Distillation Units for the
VELP UDK Series work according to the
official Kjeldahl method.
The
Kjeldahl Method is approved by all the essential Official Analytical Worldwide Bodies and Organizations such as
AOAC,
ISO,
EPA,
DIN,
ASTM, and many others.
The
Kjeldahl Method covers many industrial sectors for
Nitrogen/Protein Determination and
Nitric nitrogen determination,
Phenols,
Volatile acids,
Cyanides,
Alcohol determination, and
Devarda alloy.
Here is a list of official references according to which the UDK Series works.
FOOD & BEVERAGE OFFICIAL REFERENCE METHODS
INDUSTRY |
OFFICIAL REFERENCE METHOD |
DESCRIPTION |
Milk and dairy product |
AOAC 991.20 |
Nitrogen (Total) in Milk |
IDF 20, ISO 8968 |
Milk - Determination of nitrogen content |
Nut products (almonds, nuts, hazelnuts, coconuts) |
AOAC 950.48 |
Protein (Crude) in Nuts and Nut Products |
Beer |
AOAC 920.53 |
Protein in Beer |
Barley malt |
AOAC 950.09 |
Protein in Malt |
ASBC Barley 7A |
AMERICAN SOCIETY OF BREWING CHEMISTS Barley |
Cereals |
AOAC 979.09 |
Protein in grains |
AACC 46.11.02 |
Crude Protein -- Improved Kjeldahl Method, Copper Catalyst Modification |
ICC standard method 105-2 |
Determination of Crude Protein in Cereals and Cereal Products for Food and Feed |
Soya beans and lupins |
AOAC 920.87 |
Protein (Total) in Flour |
Meat and meat products |
AOAC 981.10 |
Crude Protein in Meat |
Bread and baked products |
AOAC 950.36 |
Protein in Bread |
Compressed and granular yeast |
AOAC 962.10 |
Protein in Dried Yeast |
Sugar, syrup, molasses |
AOAC 945.23 |
Protein in Brewing Sugars and Syrups |
Wheat spaghetti and macaroni, egg pasta |
AOAC 930.25 |
Protein in Macaroni Products |
TVB-N Total Volatile Basic Nitrogen |
Conway and Byrne's method |
Conway and Byrne's method |
REG CE 2074/2005 |
|
Wine-Alcohol strength |
OIV Method - MA - AS312 - 01A |
Alcoholic strength by volume |
Spirits drinks -Alcohol strength |
REG CE 2870/2000 |
Alcoholic Strength in Spirits Drinks |
Sulphite |
AOAC 990.28 |
Sulfites in Foods - Optimized Monier-Williams Method |
Formaldehyde |
AOAC 964.21 |
Formaldehyde in Maple Syrup |
Volatile acidity of tomato paste |
REG CE 1764/86 |
Minimum quality requirements for tomato-based products eligible for production aid |
Volatile acidity of the wine |
REG CE 2676/90 |
Methods for the analyses in the wine sector |
FEED OFFICIAL REFERENCE METHODS
INDUSTRY |
OFFICIAL REFERENCE METHOD AND APPLICATION |
DESCRIPTION |
Animal feed and pet food |
AOAC 984.13 |
Protein (Crude) in Animal Feed and Pet Food |
AOAC 2001.11 |
Protein (Crude) in Animal Feed, Forage (Plant Tissue), Grain, and Oilseeds |
REG CE 152/2009 |
Methods for sampling and analysis for official controls on feed |
EN ISO 5983-2:2009 |
Animal feeding stuff — Determination of nitrogen content and calculation of crude protein content
Part 2: Block digestion and steam distillation method |
AGRICULTURE OFFICIAL REFERENCE METHODS
INDUSTRY |
OFFICIAL REFERENCE METHOD AND APPLICATION |
DESCRIPTION |
Plants (vegetable), forage and straw |
AOAC 978.04 |
Nitrogen (Total) (Crude Protein) in Plants |
Urea |
ISO 1592 |
Urea — Determination of nitrogen content — Titrimetric method after distillation |
Urea nitrogen in feed and roughage |
AOAC 941.04 |
Urea Ammoniacal Nitrogen in Animal Feed |
Fertilizers |
AOAC 920.03 |
Nitrogen (Ammoniacal) in Fertilizers |
AOAC 955.04 |
Nitrogen (Total) in Fertilizers |
ENVIRONMENTAL OFFICIAL REFERENCE METHODS
INDUSTRY |
OFFICIAL REFERENCE METHODS AND APPLICATION |
DESCRIPTION |
Total nitrogen in water |
AOAC 973.48 |
Nitrogen (Total) in Water |
EPA 351.3 |
Nitrogen, Kjeldahl Total (Colorimetric; Titrimetric; Potentiometric) |
DIN EN 25663 |
Water quality - Determination of Kjeldahl nitrogen - Method after mineralization with selenium |
ISO 5663-1984 |
Water quality - Determination of Kjeldahl nitrogen - Method after mineralization with selenium |
Ammonia Nitrogen in water |
ISO 5664 |
Water quality — Determination of ammonium — Distillation and titration method |
Phenols in water |
APAT CNR IRSA 5070 A1 |
Phenols (spectrophotometric with 4-amino antipyrine after extraction) |
EPA 9065 |
Phenolic (spectrophotometric, manual 4-AAP with distillation) |
ISO 6439:1990 |
Water quality — Determination of phenol index — 4-Aminoantipyrine spectrometric methods after distillation |
Cyanide in water |
EPA 9010 |
Total cyanide: distillation |
Standard Method 4500 |
4500-CN− Cyanide (2017) |
APAT IRSA 4070 |
Cyanide |
Soil |
Methods of soil analysis part 2 |
Chemical and microbiological properties, 2a ed. |
Nitric Nitrogen (Devarda’s method) |
ISO 10048 |
Water quality — Determination of nitrogen — Catalytic digestion after reduction with Devarda's alloy |
EN ISO 15476:2009 |
Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda |
AOAC 892.01 |
Nitrogen (Ammoniacal and Nitrate) in Fertilizers |
EPA 1690 |
Ammonia-N in Water and Biosolids by Automated Colorimetry with Preliminary Distillation |
APAT IRSA 4030 C |
Ammonia N |
Standard Method 4500 NH3 |
4500-NH3 nitrogen (ammonia) (2017) |
CHEMICAL & PETROCHEMICAL OFFICIAL REFERENCE METHODS
INDUSTRY
|
OFFICIAL REFERENCE METHOD AND APPLICATION
|
DESCRIPTION |
Engine oils, Crude oil, fuels
|
ASTM D 3228
|
NTotal Nitrogen in Lubricating Oils and Fuel Oils by Modified Kjeldahl Method
|
ISO 333:1996
|
Coal. Determination of nitrogen semi-micro Kjeldahl method
|
ABS, SAN, rubber
|
ISO 1656:2019 |
Rubber, raw natural, and rubber latex, natural — Determination of nitrogen content |