Determination of the absolute molecular weight averages and molecular weight distributions of alginates used as ice cream stabilizers by using multiangle laser light scattering measurements.
High-performance size exclusion chromatography with multiangle laser light scattering detection (HPSEC-MALLS) was used for characterizing complete molecular weight distributions for a range of commercial alginates used as ice cream stabilizers. For the samples investigated, molecular weight averages were found to vary between 115 000 and 321 700 g/mol and polydispersity indexes varied from 1. 53 to 3.25. These samples displayed a high content of low molecular weights. Thus, the weight percentage of material below 100 000 g/mol ranged between 6.9 and 54.4%.
Turquois
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Nestle Research Centre, Vers-chez-les-Blanc, P.O. Box 44, 1000 Lausanne 26, Switzerland.
Gloria
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D000464:Alginates / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005079:Excipients / Q000737:chemistry*; D005519:Food Preservation; D007054:Ice Cream; D007834:Lasers; D008970:Molecular Weight; D012542:Scattering, Radiation
D000464:Alginates; D005079:Excipients