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Magnesium sulphate, 2.5 kg, plastic

≥99 %, p.a., anhydrous
Pack Qty.
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Empirical formula MgSO4
Molar mass (M) 120,37 g/mol
Density (D) 2,66 g/cm³
WGK 1
CAS No. 7487-88-9
EG-Nr. 231-298-2


€252.65/Pack Qty. 

excl. VAT. | 2.5 kg per Pack Qty.

Art. No. 0682.4

In production
from 6 Pack Qty. €240.02/Pack Qty.
from 24 Pack Qty. €227.38/Pack Qty.

Product details



Magnesium sulphate ≥99 %, p.a., anhydrous

Technical Information
Suitable (as desiccant) for Almost all compounds including acids, acid derivatives, aldehydes, esters, nitriles and ketones 
Particle size (ca. 105-250 µm) 60-150 mesh
Regeneration First 200 °C, then red heat 
Magnesium sulphate
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Art. No. Pack Qty. Pack. Price Quantity
0682.1 100 g glass

€25.70

0682.2 500 g glass

€70.45

0682.3 1 kg glass

€127.95

0682.4 2.5 kg plastic

€252.65

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Selected quantity:   0
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Downloads / MSDS


General information

Further attractive products to complete your chromatography laboratory can be found on our Chromatography page!


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


Salts


Desiccants

Desiccants can absorb water and bind it chemically (reversibly or irreversibly) or physically. The main desiccants can be subdivided into four categories:

  • non-renewable chemical desiccants
  • renewable chemical desiccants
  • silica gels
  • molecular sieves


Drying methods for solvents

Solvent Molecular

sieve
Potassium

carbonate
Calcium

chloride
Phosphous

pentoxide
Acetic acid - - - +
Acetic acid anhydride - - + -
Acetic acid ethyl ester 4 Å + - +
Acetic acid methyl ester 4 Å + - +
Acetone 3 Å + + -
Acetonitrile 3 Å + + +
Benzene 4 Å - + -
1-Butanol - + - -
2-Butanol - + - -
1-Butanone - + + -
Chloroform 4 Å - + +
Cyclohexane 4 Å - - -
Dichloremethane 4 Å - - -
Diethylether 4 Å - + -
Diisopropyl ether 4 Å - + -
Dimethyl formamide 4 Å - - -
Dioxan 4 Å - + -
Ethanol 3 Å - - -
Ethyle formate - - + -
n-Hexane 4 Å - - -
Methanol 3 Å - + -
2-Propanol 3 Å - - -
Pyridine 4 Å - - -
Tetrahydrofurane 4 Å - + -
Toluene 4 Å - + -
Trichloroethylene - + - -
Xylene (Isomer compound) 4 Å - + -

QuEChERS Products

For pesticide residue analysis in food

The QuEChERS (Quick, Easy, Cheap, Efficient, Rugged, Safe; "Catchers") method has achieved a leading position for the determination of pesticide residues in food by GC-MS or LC-MS within a few years of its development.
This method was developed using an extraction method for pesticides in fruit and vegetables coupled with a clean-up method that removes sugars, lipids, organic acids, sterols, proteins, pigments and excess water. This technique offers a user-friendly alternative to conventional liquid-liquid and solid phase extractions.

The process involves two simple steps. First, an extraction of the homogenised samples takes place, which are split with an organic solvent and a salt solution. The supernatant is then further extracted and purified using dispersive solid phase extraction (dSPE).
This allows rapid and cost-effective processing of heavily matrix-loaded samples. In order to optimise the extraction of pH-dependent compounds, to minimise the decomposition of sensitive substances and to cover a broad matrix spectrum, various modifications of the QuEChERS method have been developed.

  • Unbuffered original method
  • European method EN 15662
  • AOAC Official 2007.01 Method
In addition to the required sorbent silica gel 60 Diamino, a number of individually weighed and premixed buffers and extraction mixtures are offered that are specially adapted to different sample matrices.

Carl ROTH offers QuEChERS extraction and dSPE products in a variety of standard sizes and formats, making the QuEChERS method even easier to use.


Extraction

The choice between the original unbuffered method salts and buffered method salts should be based on the expected pH of the final extract and the pH sensitivity of the target analytes. The unbuffered original method is well suited for most analytes. When using unbuffered salts, the pH of the final extract is largely determined by the pH of the sample. However, if critical target analytes are unstable at certain pH values, a buffered method that maintains the required pH will provide more accurate results for pH-sensitive pesticides.

For extraction, the European Standard EN 15662 recommends a citrate extraction mix, while the AOAC Standard 2007.1 uses an acetate extraction mix.


Clean up via dSPE

The key to optimising QuEChERS purification lies in the selection of absorbents that effectively remove different types of interferences in different samples. The aim is to achieve efficient but not excessive purification so that interferences are removed and the target analytes remain in the extract.
During purification, the diamino phase (PSA) removes sugars and organic acids, for example. Magnesium sulphate is used to remove water, while C18 ec removes non-polar interfering substances such as fats and the carbon phase removes pigments, sterols and other non-polar substances.
The type and relative amount of matrix components that need to be removed from the extracts prior to analysis will help you select the appropriate dSPE products.


Adsorbents and what their use

MgSO4 Removes excess of water
NaCl For phase separation
Silica Gel 60 Diamino (PSA)
(Primary Secondary Amine)
Removes organic and fatty acids, sugars and polar pigments (e.g. anthocyanes)
Silica Gel 60 C18 ec
(reversed phase modified silica)
Traps nonpolar compounds (e.g. lipids)
Carbon (GCB)
(Activated Charcoal / Graphitized Carbon Black)
Removes non polar pigments and sterols
(please note: planar pesticides are also removed)

Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Type analysis

Appearancewhite to off-white powder
Assay (dry substance)≥99.0 %
Chloride (Cl)≤0.05 %
Arsenic (As)≤0.001 %
Iron (Fe)≤0.002 %
Heavy metals≤0.001 %