Article: see table below.
Price:
(see table below) + shipping
Payment from abroad is possible in any of the currencies CNY, USD and EUR, equivalent to the cost at the rate with 0% VAT.
We can deliver to any country.
Minimum order: 1 package.
You can buy our product through our authorized dealers in your country.
Purpose
KjelReference catalyst tablets for Kjeldahl are used at the stage of mineralization with sulfuric acid in the analysis of proteins by the Kjeldahl method. The mechanism of the catalysts is as follows:
– potassium sulfate – increases the boiling point of the acid, which accelerates decomposition;
– copper sulfate, titanium dioxide and selenium – directly catalyze the decomposition process;
– silicone – reduces the degree of foaming of samples.
We have all possible compositions of catalyst tablets for Kjeldahl, including compositions identical to those usual from other manufacturers of these catalysts, as well as our own compositions. There is a special composition for the pharmaceutical industry, corresponding to the article EP 2.5.9 of the European Pharmacopoeia.
Compositions of catalyst tablets for Kjeldahl KjelReference
| Code | Name of the catalyst | Composition of 1 tablet | Price, excluding VAT, excluding delivery |
|---|---|---|---|
| E14.L | Custom order | Any composition, weight 4 g or more (1000 tablets) | 325 USD |
| E14.M | Custom order | Any composition, weight from 3 to 4 g (1000 tablets) | 286 USD |
| E14.S | Custom order | Any composition, weight up to 3 g (1000 tablets) | 247 USD |
| E14.1.1 | KjelReference Missouri 1L | 4,5 g K2SO4 + 0,5 g CuSO4 * 5H2O (1000 tablets) | 250 USD |
| E14.1.2 | KjelReference Missouri 1S | 2,25 g K2SO4 + 0,25 g CuSO4 * 5H2O (1000 tablets) | 190 USD |
| E14.2 | KjelReference Missouri 2M | 3,5 g K2SO4 + 0,1 g CuSO4 * 5H2O (1000 tablets) | 220 USD |
| E14.3.1 | KjelReference Missouri 3L | 4,98 g K2SO4 + 0,02 g CuSO4 * 5H2O (1000 tablets) | 250 USD |
| E14.3.2 | KjelReference Missouri 3S | 2,49 g K2SO4 + 0,01 g CuSO4 * 5H2O (1000 tablets) | 190 USD |
| E14.4 | KjelReference Missouri 4M | 3,998 g K2SO4 + 0,002 g CuSO4 * 5H2O (1000 tablets) | 220 USD |
| E14.11 | KjelReference Missouri 9L | 5,0 g K2SO4 + 0,5 g CuSO4 * 5H2O (1000 tablets) | 250 USD |
| E14.12 | KjelReference Missouri 10M | 3,5 g K2SO4 + 0,4 g CuSO4 * 5H2O (1000 tablets) | 220 USD |
| E14.5.1 | KjelReference Titanium 5L | 5 g K2SO4 + 0,15 g CuSO4 * 5H2O + 0,15 g TiO2 (1000 tablets) | 250 USD |
| E14.5.2 | KjelReference Titanium 5S | 2,5 g K2SO4 + 0,075 g CuSO4 * 5H2O + 0,075 g TiO2 (1000 tablets) | 190 USD |
| E14.6 | KjelReference Titanium 6M | 3,5 g K2SO4 + 0,105 g CuSO4 * 5H2O + 0,105 g TiO2 (1000 tablets) | 220 USD |
| E14.7.1 | KjelReference Selenium 7L | 4,875 g K2SO4 + 0,075 g CuSO4 * 5H2O + 0,050 g Se (1000 tablets) | 250 USD |
| E14.7.2 | KjelReference Selenium 7S | 2,437 g K2SO4 + 0,037 g CuSO4 * 5H2O + 0,025 g Se (1000 tablets) | 190 USD |
| E14.8 | KjelReference Selenium 8M | 3,5 g K2SO4 + 0,0035 g Se (1000 tablets) | 220 USD |
| E14.9 | KjelReference PHARM (EP 2.5.9) | 3,72 g K2SO4 + 0,186 g CuSO4 * 5H2O + 0,093 g Se (1000 tablets) | 250 USD |
| E14.10 | KjelReference Antifoam (antifoaming agent, not a catalyst) | 0,97 g Na2SO4 + 0,03 g Silicone (1000 tablets) | 190 USD |
Didn’t find the catalyst composition you need?
We can produce a catalyst for Kjeldahl for you according to your recipe on an individual order. The cost and terms are usually the same as for the production of standard items.
Product type: auxiliary material
Shelf life: 5 years
Warranty: during the shelf life
Storage and transportation conditions: At air temperature from 5 °C to 40 °C and relative air humidity up to 80%
Product package:
— catalyst tablets;
— metal packaging;
— product specification (In Russian and English).
Upon request, you can obtain a product safety certificate (MSDS).
Our KjelReference catalyst tablets undergo rigorous quality control, especially for nitrogen impurities in various forms. Our catalyst tablets meet all international and regional requirements and can be used for testing, including the following:
ISO 1871:2009 Food and feed products — General guidelines for the determination of nitrogen by the Kjeldahl method
ISO 11261:1995 Soil quality — Determination of total nitrogen — Modified Kjeldahl method
ISO 5663:1984 Water quality — Determination of Kjeldahl nitrogen — Method after mineralization with selenium
ISO 8988:2006 Plastics — Phenolic resins — Determination of hexamethylenetetramine content — Kjeldahl method, perchloric acid method and hydrochloric acid method
ISO 5378:1978 Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method
ISO 8968-1:2014 | IDF 20-1:2014 Milk and milk products — Determination of nitrogen content Part 1: Kjeldahl principle and crude protein calculation
ISO 3188:1978 Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
ISO 24698-2:2018 Rubber, raw — Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber (NBR) Part 2: Kjeldahl method
ISO 20483:2013 Cereals and pulses — Determination of the nitrogen content and calculation of the crude protein content — Kjeldahl method
ISO 1656:2019 Rubber, raw natural, and rubber latex, natural — Determination of nitrogen content
ISO 937:2023 Meat and meat products — Determination of nitrogen content — Reference method
ISO 5397:1984 | IULTCS/IUC 10 Leather — Determination of nitrogen content and “hide substance” — Titrimetric method
AOAC 955.04-1955(1997), Nitrogen (Total) in fertilizers. Kjeldah
EP 2.5.9 Determination of nitrogen by sulfuric acid digestion
USP <461> NITROGEN DETERMINATION
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