Starch Viscosity (RVA) Assay

Viscosity refers to the measure of internal friction between molecules when a liquid moves under the action of an external force. GlycoSpectra Analytics uses a Rapid Viscometer Analyzer (RVA) to test the viscosity characteristics of starch. The instrument is equipped with programmable heating and variable shear forces, which can optimize the best conditions for testing the viscosity of starch, grains, flour, and food. With full visual tracking and real-time monitoring, it is capable of reflecting the characteristics of starch from the beginning of gelatinization to the post-gelatinization setback.

 

Workflow

 

Sample Submission Guidelines

1.Sample Types

 

Starch or raw samples are both acceptable.

 

2.Biological Replicates

 

A minimum of three biological replicates is recommended for robust results.

 

3.Quantity Requirements

 

Raw sample > 10 g; Starch >5 g.

 

4.Sample Preparation

 

1)Establish both control and experimental groups, ensuring a minimum of three biological replicates.

2)Ensure maintain consistency in timing whenever possible.

3)Minimize preprocessing; we prefer to handle these steps. Clients should ensure liquid samples are securely packaged in non-glass containers and buffered against shock and impact. Dry solid samples can be untreated or preliminarily ground. Fresh solid samples require no treatment when shipped with ice packs at ambient temperature.

4)When shipping with dry ice, samples should be cut into small pieces, each less than 1 cm³.

 

5.Packing and Shipping

 

1)Store samples in clearly labeled tubes, label with sample name, concentration, and preparation date. Ensure tube tops are sealed.

2)For transport, secure sample tubes in 50ml capped centrifuge tubes placed in sealable bags. Use dry ice or ice packs for transportation, avoiding repeated freeze-thaw cycles. DO NOT send the samples out on Fridays, to avoid weekend delays.

 

6.Labeling Requirements

 

1)Employ double labeling, ensuring clear identification on both the sample tubes and external packaging.

2)To prevent confusion, avoid simplistic labels like A/B/C or 1/2/3. Instead, use a combination of letters and numbers for unique sample identification, reducing the risk of duplication.

 

7.Additional Information

 

A minimum of 24 analyses is required. If fewer than 24 analyses are conducted, the cost will be calculated as if 24 analyses were performed.