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Rheumatoid Factor (RF)

RF-LTFor In Vitro Diagnostic Use

Intended Use

RF-LT is an in vitro assay for the quantitative determination of rheumatoid factor activity in serum or plasma.


Latex Immunoassay

Special Characteristics

RF-LT is not interfered significantly by other serum components. The value is determined by using Rheumatoid Arthritis Serum 1st British Standard (NIBSC) as the primary standard.

Principle of the Method

When a sample is mixed with Buffer and Latex Reagent, rheumatoid factor in the sample combines specifically with the latex sensitized with human gamma-globulin in the Latex Reagent to yield an insoluble aggregate which causes increased turbidity in the solution. The degree of turbidity of solution can be measured optically and is proportional to the activity of rheumatoid factor in the patient's sample.

Standard Procedure

Rheumatoid Factor (RF) Standard Procedure

Application to automated analyzers and Package are available upon request

Ordering Information

Product Storage Condition Shelf Life
RF-LT Buffer 2-10°C (Do not freeze) 12 months
RF-LT Latex Reagent 2-10°C (Do not freeze) 12 months
Calibrator Storage Condition Shelf Life
RF-LT Calibrator Set RF LT Calibrator 1
RF LT Calibrator 2
RF LT Calibrator 3
RF LT Calibrator 4
2-10°C 12 months

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