How to Properly Collect and Submit Samples for Laboratory Testing

Accurate laboratory results begin long before testing starts—they begin with proper sample collection and submission.

Whether you’re testing cannabis products, dietary supplements, food, beverages, cosmetics, or consumer goods, the quality of your laboratory results depends on the quality and integrity of the sample you provide.

Following proper sample submission procedures helps ensure accurate results, reduces delays, and minimizes the need for retesting.

Why Proper Sample Collection Matters

A laboratory can only analyze the sample it receives.

If a sample is contaminated, improperly packaged, mislabeled, or damaged during shipping, the results may not accurately represent the product being evaluated.

Proper collection techniques help maintain sample integrity from the moment it’s collected until testing is complete.

Select a Representative Sample

The sample you submit should accurately represent the production batch or lot.

Avoid selecting products simply because they appear to be the “best” examples. Instead, follow your company’s sampling procedures to ensure the laboratory receives a representative sample of the entire batch.

Representative sampling helps produce meaningful analytical results.

Label Every Sample Clearly

Before shipping, verify that each sample is properly labeled.

Include information such as:

• Product name

• Batch or lot number

• Sample identification number

• Date collected

• Requested testing services

Clear labeling helps prevent delays and ensures samples are processed correctly.

Use Clean, Appropriate Containers

Always package samples using clean containers suitable for the product being tested.

Containers should protect the sample from:

• Moisture

• Excessive heat

• Light exposure

• Physical damage

• Cross-contamination

Proper packaging helps preserve the condition of the sample during transportation.

Complete Required Documentation

Many laboratories require submission forms that identify:

• Company information

• Product details

• Requested analyses

• Contact information

• Purchase order or reference numbers (if applicable)

Providing complete documentation allows the laboratory to begin processing your samples more efficiently.

Package Samples Securely

Before shipping, make sure samples are protected from movement inside the shipping box.

Use appropriate cushioning materials to minimize the risk of damage during transit.

If products require temperature control or other special handling, follow the laboratory’s shipping recommendations.

Communicate Special Testing Requirements

Some products require unique handling procedures or specialized analytical methods.

Before shipping, discuss any special requirements with your laboratory to ensure the appropriate testing protocols are followed.

Clear communication helps prevent unnecessary delays.

Avoid Common Sample Submission Mistakes

Common issues that may delay testing include:

• Missing labels

• Incomplete paperwork

• Damaged packaging

• Incorrect sample quantities

• Shipping delays

• Submitting non-representative samples

Taking a few extra minutes to verify your shipment can save valuable time later.

What Happens After the Laboratory Receives Your Samples?

Once your shipment arrives, the laboratory typically:

1. Confirms receipt of the samples

2. Reviews the submission documentation

3. Assigns internal tracking information

4. Begins sample preparation

5. Performs the requested analyses

6. Reviews quality control data

7. Issues a Certificate of Analysis (COA) or laboratory report

Throughout this process, laboratories maintain procedures designed to preserve sample integrity and ensure reliable results.

Partner with Accurate Test Lab

At Accurate Test Lab, we strive to make the sample submission process simple, efficient, and reliable.

Our experienced team works with manufacturers across multiple industries—including cannabis, hemp, dietary supplements, food, beverages, cosmetics, and consumer products—to provide dependable analytical testing and responsive customer support.

If you have questions about submitting samples or selecting the appropriate testing services, our team is here to help.