Development of Karl Fischer Reagents

I-1. Questions & Answers about Karl Fischer Reagents
3. Notes to Official Food Additive List (7th ed., 1999)
62
Sorbitan sesquioleate 0.5% (1g)
Propylene glycol 0.5% (2g)
Polysorbate 80 3.0% (1g, back titration)
Sodium lauryl sulfate 5.0% (0.5g)
Polyvinyl pyrrolidone K25 5.0% (1.0g)
Polyvinyl pyrrolidone K30 5.0% (1.0g)
Polyvinyl pyrrolidone K90 5.0% (1.0g)
Macrogol 400 1.0% (2g)
Macrogol 1500 1.0% (2g)
Macrogol 4000 1.0% (2g)
Macrogol 6000 1.0% (2g)
Berberine tannate 6.0% (0.7g)
General Test Method 17: Moisture Content Test (Karl Fischer Method)
The Karl Fischer method is stipulated for the following food additives.
Item Tolerance
5'-Inosinic acid sodium salt 29.0% or lower (0.15g, back titration)
5'-Uridine acid sodium salt 26.0% or lower (0.15g, back titration)
Citric acid (anhydrous) 0.5% or lower (2g)
Disodium glycyrrhizate 13.0% or lower (0.2g, back titration)
5'-Cytidine acid sodium salt 26.0% or lower (0.15g, back titration)
Sucrose fatty acid ester 4.0% or lower (back titration)
Sodium dehyroacetate 8.3-10.0% or lower (0.3g, back titration)
Folic acid 8.5% or lower (0.2g, back titration)
5'-Calcium ribonucleotide 23.0% or lower (0.15g, back titration)
5'-Sodium ribonucleotide 27.0% or lower (0.15g, back titration)
4. Japan Petroleum Institute Standards
Test for water in liquid petroleum products (Karl Fischer Method)
JPI-5S-14-76