Learn more about Houston MJ Associates' Routine Sample Analysis,
​Method Development, and Consultation Services.

Routine Sample Analysis

Using Advanced GPC/SEC

Houston MJ Associates maintains an advanced GPC/SEC facility with Triple Detection (refractive index, light scattering, and dilute solution viscometry) capabilities.  Advanced GPC/SEC can provide the following parameters for your molecule:

• Concentration
• Refractive Index increment (dn/dc)
• Absolute molecular weight
• Radius of gyration
• Intrinsic viscosity
• Hydrodynamic radius
• Mark-Houwink constants

Using these parameters, further characteristics of your molecule can be revealed:

• Structure and branching
• Aggregation and cross-linking
• Conformation and folding
• Sample purity
• Copolymer composition (with the addition of a UV detector)

We offer routine sample analysis for

• Xylene solubles for polypropylene and ethylene-propylene copolymers
• All common organic solvents GPC
• All common aqueous solvents GPC
• GPC of proteins

We also offer non-routine GPC sample analysis with method development and consultation services.

Using Dilute Solution Viscometry

Houston MJ Associates maintains Dilute Solution Viscometry capabilities.  Sample analysis by DSV can provide the following parameters for your molecule:

• Relative viscosity
• Intrinsic viscosity
• Inherent viscosity
• Specific viscosity
• Absolute viscosity
• Molecular weight

We offer routine sample analysis for Batch DSV measurements for all common synthetic polymers.  We also offer non-routine DSV sample analysis with method development and consultation services.

Read GPC App Notes

READ DSV APP NOTES

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Method Development

GPC Method Development

DSV Method Development

Houston MJ Associates maintains an advanced GPC/SEC facility with Triple Detection (refractive index, light scattering, and dilute solution viscometry) capabilities.  In cases where a molecule cannot be analyzed by an existing method at your facility or our facility, we can provide method development services for your molecule to determine:

• Dissolution solvent
• Sample concentration
• Dissolution protocol
• Filtration protocol
• Mobile phase
• Column
• Flow rate
• Column oven temperature

Houston MJ Associates maintains Dilute Solution Viscometry capabilities.  In cases where a molecule cannot be analyzed by an existing method at your facility or our facility, we can provide method development services for your molecule to determine:

• Dissolution solvent
• Sample concentration
• Dissolution protocol
• Filtration protocol
• Mobile phase
• Oven temperature

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Consultation

GPC Consultation

DSV Consultation

Houston MJ Associates offers GPC consultation services for projects that require more communication, coordination, data interpretation than a routine analysis.  This means gathering the suite of GPC data (molecular weight distribution, structure, viscosity, etc) for a set of samples and extracting information that helps explain the performance of your molecules.

Houston MJ Associates offers DSV consultation services for projects that require more communication, coordination, data interpretation than a routine analysis.  This means gathering viscosity data for a set of samples and extracting information that helps explain the performance of your molecules.

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