Step 01 Raw Material Quarantine & Sampling
Botanicals harvested from certified origins are inspected for physical identity, moisture, foreign particulate matter, and pesticide residues.
Identity & Moisture Check Operational Capability
Precision Botanical Processing & Strict Quality Governance
At Xi'an Vexli Bio-Tech Co., Ltd., we combine traditional botanical knowledge with modern separation and drying technologies. Headquartered in Xi'an, Shaanxi, our facilities operate under internationally accredited food safety guidelines including ISO 22000 and HACCP.
Every batch of botanical material undergoes rigorous identity, purity, and safety validation from raw harvesting through solvent extraction, membrane filtration, vacuum drying, and clean-room packaging. Our operational standards deliver batch-to-batch repeatability that meets strict regulatory standards across North America, Europe, and Asia-Pacific.
1,250 m²Dedicated Facility Space
60+Specialized Team Members
100%Traceable Batches
Standardized Manufacturing Flow
From Botanical Harvest to Standardized Powder
A step-by-step overview of our 9-stage extraction and refining process designed to maximize active compound retention and minimize impurities.
Step 01 
Step 02 Controlled Extraction
Temperature-managed water or food-grade hydro-ethanolic extraction extracts bioactive fractions while preventing thermo-degradation of markers.
Multi-Stage Extraction
Step 03 Vacuum Concentration
Reduced-pressure evaporation concentrates the liquid extract under gentle thermal conditions to protect vulnerable antioxidants and natural colorants.
Vacuum Evaporation
Step 04 Purification & Chromatography
Macroporous resin absorption columns and micro-filtration eliminate undesirable insolubles, increasing target active assays up to 99% purity.
Active Standardization
Step 05 Drying & Spraying
Rapid atomization spray drying converts the purified liquid into uniform spherical granules with instant cold-water solubility.
Solubility & Bulk Density
Step 06 Ultra-Fine Pulverizing
Mechanical impact milling grinds botanical powders to tight micron tolerances tailored for softgels, tablets, capsules, or functional beverages.
Particle Size Control
Step 07 Sieving & De-Ironing
Vibratory grading sieves screen powders from 80 to 450 mesh, paired with rare-earth magnetic traps and inline metal detection.
80 - 450 Mesh Classification
Step 08 Homogeneous Mixing
Tumble and ribbon blenders ensure thorough homogeneity across custom formulations, premixes, and large multi-metric-ton production lots.
Formulation Blending
Step 09 Packaging & Lot Release
Food-grade pharmaceutical aluminum foil bags and fiber drums sealed in clean rooms, released only after dual analytical sign-off.
Dual Quality Sign-off Hardware Infrastructure
Heavy-Duty Industrial Equipment
Built with sanitary 304 and 316 stainless steel to eliminate batch contamination risks and support continuous production.
Extracting Tanks
Stainless steel dynamic extraction units with integrated thermal heating and condensing systems.
Concentrators
Multi-effect falling film and external circulation vacuum evaporators for low-energy de-watering.
Purification Columns
Preparative chromatographic columns engineered for monomer active component isolation.
Spraying Tower
High-capacity centrifugal atomization tower producing free-flowing, dispersible powders.
Industrial Pulverizer
Water-cooled mechanical micro-mill capable of delivering continuous fine powder throughput.
Sieving Machine
Multi-deck vibratory screens for exact particle size distribution and contaminant removal.
Batch Mixer
Sanitary conical and V-type powder blenders ensuring batch uniformity with CV < 3%.
Enamel Reactor
Acid-resistant glass-lined synthesis and crystallization vessels for specialty health actives.
Heating Systems
Modulated thermal distribution systems delivering exact heat for drying and extraction cycles.
Convection Dryer
Circulating hot air drying ovens for heat-tolerant botanical slices, roots, and botanicals.
In-House Quality Control
Analytical Testing Laboratory Instruments
Every lot of powder produced by Xi'an Vexli Bio-Tech Co., Ltd. is evaluated on calibrated instruments to confirm assay purity, heavy metals, residual solvents, and microbiological hygiene.
HPLC Systems
Assay quantification, active marker verification, and compound purity profiling.
GC Analyzer
Quantitative testing of volatile organic solvents and residual solvent thresholds.
UV-Vis Spectrophotometer
Spectroscopic measurement of total polysaccharides, anthocyans, and color value.
Microbiological Suite
Biosafety-controlled testing for Total Plate Count, Yeast & Mold, Salmonella, and E. Coli.
Clean Station
Class 100 laminar airflow hood maintaining sterile conditions during microbiological inoculations.
Constant Temp Incubator
Precision incubation chambers for standardized microbial colony count validations.
Vacuum Drying Oven
Standardized loss on drying (LOD) and delicate component moisture content quantification.
Rotary Evaporator
Bench-scale solvent recovery and analytical concentration for validation protocols.
Moisture Meter
Halogen moisture determination providing rapid, repeatable water content analysis.
Electronic Balance
High-precision 0.1 mg analytical balance for calibration and reference standard preparation.
Muffle Furnace
High-temperature calcination furnace for total ash and acid-insoluble ash determinations.
Digital pH Meter
Electrode pH measurement verifying acidity balances for natural pigments and solutions.
Research & Product Development
Formulation Trials & Process Innovation
Our specialized R&D engineering lab focuses on yield optimization, custom particle milling, natural carrier blends, and stability testing for international brand formulators.
Pilot Extraction Setup
Small-batch simulation mimicking industrial yield to develop custom specifications.
Formulation Bench
Solubility and flavor optimization for custom instant tea blends and superfood mixes.
Fractionation Testing
Solvent partitioning and targeted constituent recovery on pilot glass systems.
Method Development
Custom chromatographic analytical method validation for proprietary buyer blends.
Commitment to Quality
Standard Analytical Release Criteria
Every commercial batch leaving our warehouse comes with a lot-specific Certificate of Analysis verifying the parameters below.
| Quality Parameter | Standard Testing Method | Compliance Reference Standard |
|---|---|---|
| Active Compound Assay | HPLC / UV-Vis Spectrophotometry | Target specification +/- 2.0% (e.g. 99% NMN, E18 Phycocyanin) |
| Heavy Metals (Pb, As, Cd, Hg) | ICP-MS / Atomic Absorption Spectrophotometry | Compliant with USP <232> / EP 2.4.20 / California Prop 65 limits |
| Pesticide Residue Screen | LC-MS/MS & GC-MS/MS | BS EN 15662 multi-residue compliance for EU & USDA Organic requirements |
| Residual Solvents | Gas Chromatography (Headspace GC) | USP <467> Class 2 & Class 3 food-grade residual guidelines |
| Particle Size / Mesh | Analytical Sieve Shaker Analysis | Customer custom specs: 80 mesh, 200 mesh, 450 mesh 100% pass |
| Microbiological Limits | USP <2021> & <2022> / AOAC Petrifilm | TPC < 1,000 cfu/g; Yeast/Mold < 100 cfu/g; Negative Salmonella & E. coli |
Request Facility Audit Reports & COA Samples
Need detailed specifications, plant inspection documentation, or a customized factory-direct sample for laboratory benchmarking? Our international technical team responds promptly.