Quality control,
from plant to product.
From botanical sourcing and extraction to HPLC assay, microbial testing and batch documentation, our quality program connects the raw material with the specification you purchase.
Our quality system
Quality management,
at every stage.
At Nanjing NutriHerb BioTech Co., Ltd., quality control starts with the botanical material. We select plants for their intended active compounds, inspect incoming materials and choose extraction conditions suited to the plant and the required extract.
Our traceability records connect raw-material origin and procurement details with production parameters and inspection reports. Procurement, processing, storage and sales records form part of that chain, giving our team a basis for investigating a material or batch enquiry.
Selected botanicals.
Controlled extraction.
Plant selection & traceability
Plant selection considers the botanical variety and its active-compound content. Our original sourcing approach also favors farming sources near the production area where practical.
Traceability begins with the source, time and location of raw-material procurement. These records are linked with production and quality-inspection information, rather than relying on the finished-product label alone.
Extraction suited to the plant
Fresh or dried botanicals are processed with a suitable extraction solvent, followed by filtration and drying. Our processing equipment includes extraction tanks, filters, spray dryers and vacuum drying ovens; the route depends on the extract.
The solvent and any carrier are part of the formulation review. For example, our water-soluble resveratrol documentation identifies alcohol and water as the extraction solvents.
Sourcing & formulation preferences
Our sourcing approach considers preservative-free options, natural solvents, plant-origin carriers and requirements to exclude petroleum-derived ingredients. These choices are confirmed for the selected extract and formulation; they are not blanket claims for every product.
GACP-aligned agricultural practices can be discussed as part of the raw-material sourcing requirements. The applicable practices, origin information and traceability records should be confirmed for the material being evaluated.
Quality monitoring,
through production.
Our analytical methods include HPLC, UV-visible spectrophotometry, TLC, GC and AAS. Product-specific checks cover identity and assay alongside physical properties, microbiology and relevant contaminants. The agreed specification identifies the parameters, limits and reporting basis for the ingredient.
Identity & assay
A specification example from our product records: water-soluble resveratrol has a minimum assay of 8% by HPLC, on an anhydrous basis. The same document specifies at least 95% passing 80 mesh and loss on drying of no more than 5.0%.
These are limits for that documented grade, not for every resveratrol product or botanical extract. Request the current specification for your selected material; compare the assay method and reporting basis as well as the percentage.
Microbiology & contaminants
Our water-soluble resveratrol COA format lists total plate count, yeast and moulds, E. coli, Salmonella and S. aureus, alongside heavy metals, arsenic and residual solvents.
In that documented grade, the microbial limits include total plate count below 1,000 cfu/g and yeast and moulds below 100 cfu/g. These are product-specific reference limits, not a universal test panel or a current batch result. Your ingredient, destination market and purchasing specification determine the checks required.
Independent testing
Our company quality materials describe cooperation with NSF, SGS and Eurofins for third-party testing. For a specific enquiry, confirm the laboratory, sample, test scope and available report with our team.
A laboratory relationship is not product certification. Each report applies to the sample and tests it identifies.
Documentation
Technical documents,
for your ingredient review.
Our original quality program includes finished-product specifications, safety data sheets and supporting technical documents. Product records also contain COAs that put the specification and batch result side by side. Together, these documents help your team review what is ordered, how it is assessed and how it should be handled.
Specification / TDS
Confirm the botanical or ingredient name, plant part where applicable, active-content target, assay basis, solvent and any carrier. Physical requirements can include appearance, particle size, loss on drying and residue on ignition, as shown in our resveratrol product records.
Use the agreed specification revision for both sample evaluation and the purchase order. An extract name or assay percentage alone does not define the complete grade.
Safety data sheet
A safety data sheet provides material-specific information for handling, storage and workplace precautions. Request the current SDS, sometimes referred to as an MSDS, for the ingredient being reviewed. It serves a different purpose from a specification or batch COA.
Certificate of analysis
Our product COA format separates analysis, specification and results, with product identification and manufacture and certificate dates. That distinction matters: a permitted limit is not the measured batch result.
For example, the water-soluble resveratrol record specifies residue on ignition at no more than 0.1%. Check the result on the COA issued for the actual lot being supplied, rather than treating this documentation example as a current test certificate.
Batch test information
Quote the product and lot number, then identify the result you need to review: for example, HPLC assay, particle size, loss on drying or a microbial count. Ask which supporting records are available for that lot.
Useful comparison fields include the method, unit, reporting basis, test date and applicable limit. Where a COA says "Complies", discuss whether further supporting detail is needed for your approval.
Third-party test reports
For an available external report, check the issuing laboratory, sample identification, batch reference, method and tests covered. Confirm whether that report meets your own approval requirements. A report for one sample does not establish the status of other products or future batches.
Certification & market documents
Tell us which certification or destination-market documents your project requires. For any document provided, verify the named company, product coverage, validity period and intended market. Company-level certification does not automatically cover every ingredient or application.
Bring your requirements.
We'll review the ingredient.
Send the ingredient and plant part, target assay and method, required quantity and destination. Include any limits for particle size, microbiology or contaminants, plus solvent, carrier and document requirements. We can then review the specification and discuss suitable material and sample options with your team.
- Ingredient & plant part
- Assay, method & key limits
- Quantity, destination & documents