01 / CHROMATOGRAPHY
HPLC purity testing
Purity analysis of the submitted sample.
Understand the chromatographic profile and HPLC purity information under the agreed method.
INDEPENDENT PEPTIDE TESTING IN CHINA
Test Before
Your Supplier Ships.
Buying peptides from a supplier in China? Don’t rely solely on a supplier-provided COA. Have your supplier send a sample for independent HPLC and MS testing in China before you authorize shipment.
WE TEST. WE DON’T SELL.
DOMESTIC SAMPLE DELIVERYENGLISH PDF REPORT
FIG. 01 / ANALYTICAL DOCUMENTATION
IPT / ANALYSISDEMO
DEMO ANALYTICAL REPORT
01 HPLCILLUSTRATIVE CHROMATOGRAM
02 MSILLUSTRATIVE MASS SPECTRUM
STATUSTESTING COMPLETE / DEMO
Illustrative document only. Fictional sample and report IDs.
No real test results, purity values, or molecular weights.
HPLC + MSINDEPENDENT EVIDENCE. INFORMED DECISIONS.
INDEPENDENT ANALYSIS / INFORMED PURCHASINGSCROLL TO EXPLORE
WE TEST.
WE DON’T SELL.
We do not manufacture, sell, broker, or supply peptides.
Our role is independent analytical testing.
01THE BUYER’S PERSPECTIVE
A supplier COA is not
the same as an
independent test.
Your supplier may provide a COA. That can be useful information, but when you are making a purchasing decision, you may want analytical evidence that does not come from the seller.
Independent testing gives you another data point before the shipment leaves China.
Understand the differenceTHE DECISION REMAINS YOURS.
We provide analytical findings. You decide what they mean for your order.
02A SIMPLE DOMESTIC PROCESS
China-based testing.
Buyer-led decisions.
Your supplier sends the sample.
You keep control of the purchasing decision.
- 01Arrange the test
You coordinate with your supplier.
Tell us your sample and testing requirements. We confirm the method, sample requirement, price, and delivery instructions.
OVERSEAS BUYER → CHINESE SUPPLIER - 02Domestic sample delivery
Your supplier sends a sample in China.
The sample travels domestically to the confirmed receiving address, before the main international shipment.
SAMPLE SHIPPED DOMESTICALLY IN CHINA - 03Independent analysis
We test the submitted sample.
The received sample is analyzed using the agreed HPLC, MS, or combined testing scope.
SAMPLE RECEIVED → TESTING → HPLC + MS - 04Review before shipment
You receive the report. You decide.
Review your English PDF analytical report as another data point before deciding whether to authorize shipment.
REPORT READY → BUYER REVIEWS → BUYER DECIDES
NO INTERNATIONAL SAMPLE SHIPPING REQUIRED
See the full processYour supplier can send the sample domestically within China, helping you obtain independent analytical information before the main shipment leaves China.
03TESTING OPTIONS
Ask two different questions.
Get independent evidence.
What is the sample’s purity profile?
Is its mass consistent with the expected identity?
02 / MASS SPECTROMETRY
MS identity check
Identity / molecular-weight-related analytical information for the submitted sample.
Add mass-related analytical information to evaluate the submitted material against the expected identity.
03 / COMBINED ANALYSIS
RECOMMENDEDHPLC + MS
Combined purity and identity-focused analytical testing.
Two complementary methods. A more informative view of the sample you submit.
Method suitability, sample requirements, and turnaround time are confirmed before you send a sample.
04CLEAR SCOPE. CLEAR LIMITATIONS.
Know exactly what
your report represents.
Independent evidence is useful when its
boundaries are understood.
What the test can tell you
- Analytical findings for the sample received
- HPLC purity information
- MS identity / molecular weight information
What the test cannot tell you
- Whether the submitted sample represents every vial
- Whether it represents the entire batch
- Whether a later shipment is identical to the tested sample
SAMPLE-SPECIFIC RESULTS
Test results apply only to the sample received and tested. Results do not certify or guarantee the entire batch or shipment.
05BEFORE YOU SEND A SAMPLE
A few practical
questions.
Start with a conversation.
We’ll help you confirm the scope.
Can my Chinese supplier send the sample directly to you?
Yes. After we confirm the testing scope, sample requirement, and domestic delivery instructions, you can ask your supplier to send the sample directly within China. Please contact us before arranging delivery.
Do I need to ship the sample internationally?
No international sample shipping is required when your supplier is in China and sends the sample domestically. The sample can be analyzed before the main shipment leaves China.
How much sample is required?
The requirement depends on the sample and testing method. Contact us to confirm the current requirement, packaging, and any preparation instructions before your supplier sends material.
Will I receive an English report?
Yes. You receive an English PDF analytical report for the sample received and tested. Confirm the reporting scope and any specific documentation requirements when arranging the test.
Can you guarantee the entire batch?
No. Test results apply only to the sample received and tested. Results do not certify or guarantee the entire batch or shipment, or establish that a later shipment is identical to the tested sample.
06THE BUYER’S READING ROOM
More context.
Better questions.
All resources & guidesHow to Independently Test Peptides Before They Leave China
A practical guide to coordinating your supplier, domestic sample delivery, and an analytical decision checkpoint before international shipment.
Read the guideSupplier COA vs Independent Peptide Testing: What’s the Difference?
Understand the source of the evidence, the analytical scope, and why a tested sample does not certify an entire shipment.
Read the guideHPLC vs Mass Spectrometry for Peptide Testing
Purity-related chromatography and mass-related identity evidence answer different questions. Learn how to choose and interpret a combined scope.
Read the guideBEFORE THE SHIPMENT. BEFORE THE NEXT DECISION.Put independent evidence
Put independent evidence
in your hands.
Tell us what you need to test. We’ll confirm the options,
sample requirements, current price, and next steps.