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Summary Information

Sample:Acetone

Report No.:676

Group(s):Ketones

Ketones have a tendency to form ketals. At the same time water is formed. Cyclohexanone and acetone react rapidly, longchain ketones react more slowly. Aromatically substituted ketones only react very slowly. The bisulfite addition is a furtherinterfering side reaction. Reactive ketones are titrated with the methanol-free K-reagent, those which react sluggishly can bealso titrated with the standard reagents. Although the coulometric determination is possible, it requires special methanol-freereagents in every case.The above mentioned compound is a reactive ketone. It must be titrated with the methanol-free K-reagents. This is true forboth the volumetric and the coulometric determinations.

I. Coulometric Procedure (cell without diaphragm)

Reagent:100 ml HYDRANAL-Coulomat AK

Sample handling:The sample is added with a calibrated syringe or with a plastic syringe. Weigh by difference.

Sample amount:0.5 ml

Procedure:The coulometric cell is filled with the reagent. After switching the equipment on, the cell will dry automatically.

When the drift has stabilized, the determination is commenced and the sample introduced into the cell. PLEASE NOTE:HYDRANAL-Coulomat AK is preferred for use in coulometric cells with diaphragm. In cells without diaphragm it may be used,although the accuracy of the results is higher in cells with diaphragm.

II. Coulometric Procedure (cell with diaphragm)

Anolyte:100 ml HYDRANAL-Coulomat AK

Catholyte:5 ml HYDRANAL-Coulomat CG-K

Sample handling:The sample is administered with a calibrated syringe or with a plastic syringe. Weigh by difference.

Sample amount:0.5 ml

Procedure:The coulometric cell is filled with the reagent. After switching the equipment on, the cell will dry automatically.When the drift has stabilized, the determination is commenced and the sample introduced into the cell.

III. Volumetric Procedure (one-component reagents)

Titrating agent:HYDRANAL-Composite 5 K

Working medium:30 ml HYDRANAL-Working Medium K

Sample handling:The sample is added with a pipette or a calibrated syringe.

Sample amount:5 ml

Procedure:The working medium is placed in the titration cell and titrated to dryness with the titrant. Then the sample isadded and titrated in the same way to a stable end-point.

IV. Volumetric Procedure (two-component reagents)

Procedure:Due to the mentioned side-reaction (see Info), we favor the volumetric titration with a one-component reagent.

Back to full list of report summaries.

Materials

Product # Image Description Molecular Formula Add to Cart

650501 Acetone CHROMASOLVPlus, for HPLC, 99.9% C3H6O pricing

270725 Acetone CHROMASOLV, for HPLC, 99.9% C3H6O pricing

34850 Acetone CHROMASOLV, for HPLC, 99.8% C3H6O pricing

439126 Acetone CHROMASOLV, for HPLC, 99.9% C3

H6

O pricing

414689 Acetone capillary GC grade, 99.9% C3H6O pricing

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Determination of Water Content in Acetone Using Karl Fischer Titration
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179124 Acetone ACS reagent, 99.5% C3H6O pricing


443638 Acetone ACS reagent, 99.5% C3

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00561 Acetone for luminescence, 99.5% (GC) C3H6O pricing

31062 Acetone for analysis of dioxins, furans and PCB, 99.8% C3H6O pricing

34480 Acetone for pesticide residue analysis C3

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90872 Acetone analytical standard C3H6O pricing

32201 Acetone puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur.,

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40308 Acetone semiconductor grade ULSI PURANAL(Honeywell

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40289 Acetone semiconductor grade VLSI PURANAL(Honeywell

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00585 Acetone 99.0% (GC) C3H6O pricing

00580 Acetone tested according to Ph.Eur. C3H6O pricing

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179973 Acetone Laboratory Reagent, 99.5% C3

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69508 Acetone for inorganic trace analysis, TraceSELECT,

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34816 HYDRANAL-Composite 5 K Reagent for volumetric one-

component Karl Fischer titration in aldehydes and ketones

(methanol free)

pricing

34820

HYDRANAL-Coulomat AK reagent for coulometric KF

titration in ketones (anolyte solution), preferred for cells

with diaphragm

pricing

34821 HYDRANAL-Coulomat CG-K reagent for coulometric KF

titration in ketones (catholyte solution) pricing

34817

HYDRANAL-Working Medium K reagent for volumetric

one-component KF titration in aldehydes and ketones

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pricing
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