Naar de inhoud springen Naar het navigatiemenu springen

Ammonium sulphate, 1 kg

≥99,5 %, p.a., ACS, ISO
Verwante producten
VE
Verp.
di-Ammoniumsulphate
Empirical formula (NH4)2SO4
Molar mass (M) 132,14 g/mol
Density (D) 1,77 g/cm³
Melting point (mp) 230 °C
WGK 1
CAS No. [7783-20-2]
EG-Nr. 231-984-1

Reagent for precipitation of proteins, buffer substance, preparation of ammonium alum.

Guarantee analysis

31,10 €/VE 

Excl. btw | 1 kg Per VE

Bestelnr. 3746.1

Op voorraad
Vrij van verzendingskosten vanaf 125 €
Snelle en betrouwbare levering!
Vanaf 6 VE 29,54 €/VE
Vanaf 24 VE 27,99 €/VE
Carl Roth abonnementservice

Now recurring orders conveniently delivered as a subscription!

With the new Carl Roth Replenishment Service you can let products be ordered automatically which you need regularly in your lab!

How it works:
1

Put all products for your subscription in the desired quantity in the basket.

2

In the shopping cart, select the option "Order shopping cart as subscription" Order as subscription.

3

Set Starty point and interval for your subscription and submit order!

By the way: Through your account you can customize or delete your subscriptions anytime.

Vragen over dit product?

Do you have a question about this product?

In the general information or Product details, we have compiled extensive descriptions and downloads for each product.
If you can not find an answer to your question in the Certificates of Analysis and Application Examples , feel free to contact us!
Neem contact op met service
Ammonium sulphate
Geselecteerde hoeveelheid:   0
  1. Tussentotaal:  0.00
Bestelnr. VE Verp. Prijs Hoeveelheid
3746.1 1 kg plastic 31,10 €
3746.2 250 g plastic 13,90 €
3746.3 2,5 kg plastic 56,45 €
3746.4 5 kg plastic 99,45 €
3746.5 25 kg plastic 342,95 €
3746.6 10 kg plastic 160,20 €
Op voorraad
Binnenkort beschikbaar
Niet beschikbaar
Leveringsdatum onbekend op dit moment
Geselecteerde hoeveelheid:   0
  1. Tussentotaal:  0.00

Downloads


Algemene informatie

Analysis of Food

Carl ROTH also offers reagents suitable for food analysis.

On the following pages, you will find the determination of
• Nitrogen according to Kjeldahl
• Sugar
• Mercury
• Trichinae
• Fat

and the determination of the
• Iodine value
• Acid value
• Peroxide value
• Saponification value

as well as other determining factors such as
• Viscosity
• Density
• Hydroxyl value
• Fluoride ions


Determination of Nitrogen according to Kjeldahl

The most common technique for measuring the amount of nitrogen in organic matter is the Kjeldahl method, which is used in a wide range of sectors such as environmental analysis, food analysis, water analysis and agricultural analysis, as well as in the pharmaceutical and chemical industries. In this traditional method, a precisely weighed sample is broken down using concentrated sulphuric acid, a process which digests its organic contents and reacts nitrogen to form ammonium sulphate.(CHNO)(s) → CO2 (g) + SO2 (g) + H2O (g) + NH4SO4 (solv, H2SO4)A catalyst or catalyst mixture consisting of copper, selenium, mercury and/or titanium is added to speed up the reaction. Sodium or potassium sulphate is used to give the sulphuric acid a higher boiling point. If the nitrogen is contained in a nitro, nitroso or azo compound, however, the mixture must be reduced with zinc before digestion takes place.
The nitrogen is now present in the sulphuric acid as ammonium sulphate. Adding a strong base (such as NaOH) neutralises the sulphuric acid and liberates ammonia from the solution.NH4SO4 (solv) + 2 NaOH (aq) → Na2SO4 (aq) + 2 NH3 (g) + 2 H2O (l) The ammonia is led into an acid (such as boric acid) by means of steam distillation.B(OH)3 (aq) + 2 H2O (l) + NH3 (g) → B(OH)4- (aq) + NH4+ (aq) The resulting strong base (borate ion) is back-titrated with a strong acid (hydrochloric acid or sulphuric acid). The excess weak boric acid is not captured in the process. A Tashiro's indicator that changes colour in the acid is used for titration. The amount of acid that has been used up can then be converted into the amount of nitrogen in the sample. NH4+ (aq) + B(OH)4- (aq) + HCl (l) → NH4Cl (aq) + B(OH)3 (aq) + H2O (l)To calculate the protein content of the sample, the varying nitrogen content of the amino acids must be checked and the relevant conversion factors applied. The nitrogen contained in food derives mainly from proteins, but different samples may also contain other sources of nitrogen.


Salts for Analysis

Our salts for analysis are manufactured under strict production guidelines. Analytical purity and best quality reliably characterize each batch. Salts in p.a. quality made by Carl ROTH meet the high requirements for reproducible results. Most of our salts are additionally specified according to international standards like ACS and ISO.

Definition:
p.a.: pro analysi (for analysis)ACS: American Chemical SocietyISO: International Standard Organisation


Analysecertificaten

Hier kunt u uw analysecertificaat voor het geselecteerde product zoeken en downloaden. Geef een chargenummer op.
De volgende analysecertificaten werden gevonden:

Guarantee analysis

Assay (acidim.)≥99,5 %  
pH value (5 % in H2O)5,0-6,0  
In H2O insoluble matter≤0,005 %  
Ash content (as SO4)≤0,005 %  
Phosphate (PO4)≤0,0005 %  
Nitrate (NO3)≤0,001 %  
Chloride (Cl)≤0,0003 %  
Arsenic (As)≤0,00002 %  
Lead (Pb)≤0,0002 %  
Cadmium (Cd)≤0,0001 %  
Calcium (Ca)≤0,001 %  
Iron (Fe)≤0,0002 %  
Cobalt (Co)≤0,0005 %  
Magnesium (Mg)≤0,0005 %  
Sodium (Na)≤0,005 %  
Nickel (Ni)≤0,0005 %  
Heavy metals (as Pb)≤0,0005 %  
Zinc (Zn)≤0,0001 %  
Loss on drying (100 °C)≤0,1 %  

0 Beoordelingen

0.0 van 5 sterren