How to test the quality of Polyanionic Cellulose?
2026-04-14 10:03:30
Quality testing of Polyanionic Cellulose(PAC)mainly focuses on physical and chemical indicators,stability performance,and application-specific properties.Conventional and industrial test items include the following:
1.Conventional Physical&Chemical Indexes
Appearance:White or off-white powder,no agglomeration or impurities.
Moisture content:Generally controlled≤10%to avoid mold and viscosity fluctuation.
Ash content:Reflects purity;lower ash means higher purity.
pH value:Usually neutral to weakly alkaline(6.5–8.5).
Degree of Substitution(DS):Key index affecting salt resistance and stability.
2.Viscosity Test
Test at a certain concentration(1%or 2%aqueous solution)using a rotational viscometer.
Classify as PAC-LV(low viscosity)or PAC-HV(high viscosity)based on results.
Check batch-to-batch viscosity consistency.
3.Solubility Test
Observe dissolution rate and whether the solution is uniform,transparent,and free of insoluble particles or flocs.
4.Salt Resistance Test
Dissolve PAC in salt water(saturated brine or 10%NaCl solution)to test whether viscosity remains stable and no precipitation occurs.
5.Thermal Stability Test
Heat the PAC solution to a certain temperature(e.g.,80°C–130°C)to measure viscosity retention rate.
6.Fluid Loss Performance(for drilling grade)
Test API fluid loss to evaluate its effectiveness in drilling fluids and filter cake quality.
7.Food Safety Indicators(for food grade)
Heavy metals(Pb,As,Hg)
Microbial limits(total plate count,coliform,pathogens)
Meet GB 2760,FDA,E466 and other food standards
References
GB/T 7714
Wang Q,Liu Y,Zhang L.Quality evaluation and testing methods of polyanionic cellulose[J].Chemical Testing and Analysis,2019,28(3):45–49.
MLA
Wang,Qian,et al."Quality Evaluation and Testing Methods of Polyanionic Cellulose."Chemical Testing and Analysis,vol.28,no.3,2019,pp.45–49.
APA
Wang,Q.,Liu,Y.,&Zhang,L.(2019).Quality evaluation and testing methods of polyanionic cellulose.Chemical Testing and Analysis,28(3),45–49.
