GENEQ > Biotechnologie > Analyseurs de Chlorure
| Analyseur de chlorure |
| Modèle 926 |
|
| KEY APPLICATION AREAS |
|
The measurement of Salt (Sodium Chloride) concentration in the Food and Dairy Industry is universal. The ability to read direct in Salt concentration makes the model 926 the instrument of choice for manufacturers and food analysts around the world. Salt and salinity also represents serious contamination in Industrial processes and the sensitivity of the coulometric method enables measurement in the ppm range in boiler feed water, polymer washes. bore hole slurries, as well as soils analysis and others. The 926 has proven itself to be the method of choice for many desalination studies and general quality control of sample lines. Clinical measurement of the chloride ion is essential for monitoring of electrolyte balance of patients as it plays, in combination with sodium and potassium, an important part in maintaining water balance between cells, plasma and interstitial fluid. The Model 926s is also widely used in the confirmation of the diagnosis of Cystic Fibrosis. The model 926S variant can accept 20 microlitre samples. Sherwood Scientific has method notes for these and other Applications. Pharmaceutical Production, Cement Manufacture, Photography Veterinary. |
| PRINCIPLES OF METHOD |
The main difficulties
with the classic method were that silver nitrate reagent would change
on storage due to a photochemical reaction and that the titration end
point is visually weak. The reagent would have to be standardized requiring
a highly skilled analytical technician . The 926 method is based on a
coulometric titration and is an absolute method where the reagent, the
silver ions, is precisely and quantitatively generated at the time of
the analysis by passing a constant current between donor electrodes. The
end point is detected by the use of sensing electrodes which measure the
change in solution conductivity which occurs when excess silver ions are
present in solution. |
| REAGENT SYSTEM |
The Buffer system is optimised
to eliminate interfering ions and incorporates a special dispersant to
ensure reproducible formation of the silver chloride precipitate and enhance
analytical performance. |
| APPLICATIONS |
| Agriculture |
| • Fertiliser Manufacture • Soil Analysis • Plant Analysis • Feed Analysis* |
| Baking |
| • Cake and Flour Manufacture* • Quality Analysis of Final Product • Chemical Additive Analysis* |
| Brewing and Wine Production |
| • Water Analysis Prior to Brewing • Soil Analysis • Added Salts Quality Control • Hop and Grape Analysis |
| Cement manufacture* |
| • Quality Control of cement During Drying
Process • Preparation of Gypsum and plaster Board |
| Dried Egg manufacture |
| • Preparation and Determination of Shelf Life and Stability |
| Meat and Fish Processing |
| • Determination of Added Salt in Curing Process* |
| Protroleum and oil Production |
| • Determination of Salt Concentration in Bore Slurries* |
| Pharmaceuticals |
| • Water Analysis • Antibiotic Production* • Quality Control of Chemicals used in Drug Manufacture |
| Photography |
| • Determination of Chloride in Fixing and Developing Solutions |
| Food Manufacture |
| • Chloride Measurement in Tomato/Friut
Juices* • Chloride Determination in canning Liquors, Brines • Quality control of Final Package after Food Preparation • Chloride in Yoghurt Manufacture • Freeze Drying of Food Preparation |
| SPECIFICATIONS | ||
|
Model 926 |
Model 926S |
|
| Sample size |
500 microlitres |
20 microlitres |
| Readout Range |
10-999mg Cl/l; 2-165mg%Salt |
10-299mmolCl/l |
| Analysis Time |
35 sec @ 200mgl/l |
35 sec@ 100mmolCl/l |
| Accuracy |
SD <1% @ 0.1% Cl Std Solution |
+-2% @ NQCS 100mmol/l |
| Linearity |
1% in range 10-999mgCl/l |
1% 10-299 mmolCl/l |
| Reproducibility CV for 20 replicates |
<1.5% @ 200mgCl/l |
<1.5% @ 100mmolCl/l |