Method for determining molecular weight of polymers

Method for determining molecular weight of polymers

The invention is a method for mass analysis of polymers by mobility measurements of charge reduced ions generated by electrosprays of polymers using solvents having high dielectric constants. Polymer ions formed by electrospray carry a level of charge proportional to their length and hence their mas...

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Hauptverfasser: SAUCY, DANIEL ALAIN, ALEXANDER, JAMES NELSON, IV
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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creator SAUCY, DANIEL ALAIN
ALEXANDER, JAMES NELSON, IV
description The invention is a method for mass analysis of polymers by mobility measurements of charge reduced ions generated by electrosprays of polymers using solvents having high dielectric constants. Polymer ions formed by electrospray carry a level of charge proportional to their length and hence their mass. The number of charges on the resulting polymer ions is reduced to unity in a radioactive source. The mobility distribution of the reduced charge polymer ions is then measured in a high resolution differential mobility analyzer (DMA). A relation Z(m) between the mobility Z of a polymer and its mass m is determined using narrowly distributed polymer mass standards. Polymers analyzed in accordance with the invention include both water soluble and water insoluble polymers having weight average molecular weights between 1 kilodaltons (kD) and 500,000 kD.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
title Method for determining molecular weight of polymers
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