Comparing botanical extract assay methods? Align HPLC, UV, TLC or buyer-defined method wording before COA and sample review.
Requirements
This B2B template helps buyers prepare supplier questions before comparing botanical extract grades. Keep the material name, source, target marker, assay method, COA fields, sample needs and commercial details in one working file.
Selection Criteria
| Field | Buyer input | Supplier review purpose |
|---|---|---|
| Assay method | HPLC, UV, TLC or buyer-specified wording. | Keeps COA comparison consistent across suppliers. |
| Marker target | Marker name, assay range and extract ratio direction. | Connects method wording with the buyer specification. |
| Sample link | Sample code, batch number and representative COA. | Makes the document set easier to audit. |
| Physical fields | Appearance, color, odor, particle size and flow direction. | Supports formulation screening. |
| RFQ notes | MOQ, packing, lead time and destination market. | Connects method review with commercial planning. |
Practical Recommendation
Use this page as a pre-RFQ worksheet. If the grade is fixed, send the target assay and method first. If the grade is still open, ask the supplier to propose available specification options with representative COA and sample lot details.
Open Grade vs Fixed Specification
| Dimension | Open grade | Fixed specification |
|---|---|---|
| Best use | Early supplier screening and sample comparison. | Strict QA review and quotation. |
| Buyer input | Application, source direction and acceptable marker range. | Exact marker, method, physical fields and document list. |
| Limit | Needs later specification confirmation. | May reduce available supplier options. |
Related Product Pages
- Ginkgo Biloba Leaf Extract Supplier – HPLC marker review.
- Chlorogenic Acid Supplier – HPLC assay range review.
- Magnolia Bark Extract Supplier – Honokiol or magnolol method review.
Checklist
- Target marker and assay method.
- Expected assay range or extract ratio.
- Sample code and representative COA.
- Physical field requirements.
- MOQ, packing and destination market.
Related Sourcing Pages
- Plant Extract Supplier hub for category-level comparison.
- Plant Extract COA Review Checklist for document screening.
- Plant Extract Sample Request Guide for sample and RFQ preparation.
- Contact HERBSEA with specification, sample, COA and RFQ requirements.
FAQ
Ask for the method that matches the buyer specification, such as HPLC, UV, TLC or a buyer-defined method note.
Different method wording can make supplier values hard to compare, so buyers should align the method before approving samples.
Send the marker target, expected range, sample quantity, COA needs, MOQ expectation, packing and destination market.
Summary
Before supplier comparison, align material identity, target marker, assay method, specification fields, sample plan, MOQ, packing and destination market. Clear inputs help both sides move from document review to quotation.
Download or request the botanical extract RFQ worksheet from HERBSEA.