Chemical composition analysis of traditional Chinese medicine (TCM) materials identifies and quantifies the bioactive compounds, marker substances, and potential contaminants present in herbal medicines. This comprehensive analytical service supports quality control, pharmacopoeia compliance, product development, and regulatory submission for herbal manufacturers, research institutions, and distributors worldwide.
Technical Overview
Traditional Chinese medicine (TCM) materials are inherently complex natural products containing hundreds to thousands of primary and secondary metabolites, including alkaloids, flavonoids, saponins, glycosides, terpenoids, volatile oils, polysaccharides, and phenolic acids. The therapeutic efficacy and safety of these materials depend directly on the identity and concentration of their chemical constituents, which vary significantly with species authentication, geographical origin, harvest season, cultivation conditions, processing methods, and storage environment.
Chemical composition analysis is the scientific foundation for evaluating the quality, authenticity, and safety of Chinese herbal medicines. It encompasses qualitative identification of characteristic constituents, quantitative determination of marker compounds, chromatographic fingerprint profiling for holistic quality assessment, and screening for hazardous contaminants. All testing is performed in accordance with internationally recognized standards, including the Chinese Pharmacopoeia (ChP 2020 Edition), the United States Pharmacopeia (USP), the European Pharmacopoeia (Ph. Eur.), and AOAC official methods.
Testing Samples
Our laboratory accepts a wide range of sample matrices related to traditional Chinese medicine, covering the entire value chain from crude botanical materials to finished consumer products.
Crude Herbal Materials
Raw, unprocessed botanical materials including roots, rhizomes, barks, leaves, flowers, fruits, seeds, and whole plants. Representative examples include Panax ginseng root, Astragalus membranaceus root, Salvia miltiorrhiza root, Glycyrrhiza uralensis (licorice) root, and Coptis chinensis rhizome.
Processed Decoction Pieces
Cut, cleaned, and processed herbal slices prepared according to traditional processing procedures, such as honey-fried licorice, stir-fried Atractylodes, and vinegar-processed Cyperus. Processing can significantly alter the chemical profile, making analytical verification essential.
Herbal Extracts and Concentrated Powders
Standardized extracts, granules, and concentrated powders produced by water extraction, ethanol extraction, or supercritical fluid extraction, requiring verification of extract ratios and marker compound content.
Volatile Oils and Essential Oils
Distilled aromatic fractions from materials such as Atractylodes lancea, Angelica dahurica, and mint, analyzed for terpene and aromatic compound composition.
Finished TCM Products
Formulated products including traditional decoction granules, tablets, capsules, pills, oral liquids, tinctures, herbal teas, dietary supplements, functional foods, and herbal cosmetic ingredients.
Testing Items
Testing portfolios are customized according to pharmacopoeial monographs, client specifications, and target-market regulatory requirements.
Marker Compound Quantification
- Ginsenosides (Rg1, Re, Rb1, Rg3, etc.) in Panax ginseng and Panax notoginseng
- Berberine, palmatine, and coptisine in Coptis chinensis and Phellodendron
- Glycyrrhizin (glycyrrhizic acid) and liquiritin in licorice
- Astragaloside IV and calycosin-7-O-glucoside in Astragalus
- Salvianolic acid B, cryptotanshinone, and tanshinone IIA in Salvia miltiorrhiza
- Paeoniflorin and albiflorin in Paeonia lactiflora
- Baicalin, wogonin, and oroxylin A in Scutellaria baicalensis
- Curcuminoids (curcumin, demethoxycurcumin, bisdemethoxycurcumin) in turmeric
- Sennosides A and B in senna; emodin and chrysophanol in rhubarb
- Synephrine in Citrus; chlorogenic acid in Lonicera japonica (honeysuckle)
Compound Class Profiling
- Total alkaloids, total flavonoids, total saponins, and total polysaccharides by spectrophotometric methods
- Full chromatographic fingerprint profiles for batch-to-batch consistency evaluation
- Qualitative screening for characteristic compound classes using LC-MS and GC-MS
Safety and Contaminant Testing
- Heavy metals and harmful elements: lead, cadmium, arsenic, mercury, and copper
- Multi-residue pesticide screening covering organophosphates, organochlorines, pyrethroids, and carbamates (over 500 compounds)
- Mycotoxins: aflatoxins B1, B2, G1, G2, ochratoxin A, and zearalenone
- Sulfur dioxide residue from sulfur fumigation
- Residual solvents from extraction processes
- Moisture, total ash, acid-insoluble ash, and extractives content
Testing Methods
Analyses are performed using validated instrumentation and methods housed in a GLP-compliant laboratory environment, with full method validation covering specificity, linearity, precision, accuracy, and limits of detection and quantification.
- High-Performance Liquid Chromatography (HPLC-DAD/UV): primary technique for quantitative determination of non-volatile marker compounds per pharmacopoeial monographs
- Ultra-High Performance Liquid Chromatography (UHPLC): high-throughput analysis with enhanced resolution for complex herbal matrices and fingerprint profiling
- Liquid Chromatography–Tandem Mass Spectrometry (LC-MS/MS): ultra-trace quantification of pesticides, mycotoxins, and low-level bioactive compounds with definitive structural confirmation
- Gas Chromatography–Mass Spectrometry (GC-MS): characterization of volatile oil compositions, terpene profiling, and residual solvent determination
- Thin-Layer Chromatography (TLC/HPTLC): rapid identity confirmation and comparative fingerprinting as specified in pharmacopoeial tests
- Inductively Coupled Plasma Mass Spectrometry (ICP-MS): multi-element determination of heavy metals at parts-per-billion sensitivity
- UV-Visible Spectrophotometry: determination of total compound class content, such as total flavonoids and total polysaccharides
- Nuclear Magnetic Resonance Spectroscopy (NMR): structural elucidation of isolated unknown compounds and quantitative NMR applications
Applications
Chemical composition analysis delivers actionable data across diverse applications in the herbal medicine and natural products industries.
- Quality control and batch release testing for herbal manufacturers and processors
- Pharmacopoeial compliance verification for registration with regulatory authorities in China, the United States, the European Union, Japan, and Southeast Asia
- Species authentication and detection of adulteration or substitution with inferior or hazardous botanicals
- Optimization of extraction, processing, and formulation parameters during research and development
- Stability studies and shelf-life determination for finished herbal products
- Supply chain verification, supplier qualification, and raw material incoming inspection
- Support for clinical research, pharmacological studies, and scientific publication
- Export certification and documentation for international trade of herbal materials and supplements
- Investigation of product quality complaints, batch deviations, and post-market surveillance
FAQ
How long does chemical composition analysis of herbal materials take? Standard marker compound quantification typically requires 7 to 10 working days after sample receipt. Multi-residue pesticide screening, full fingerprint profiling, or custom method development may require 10 to 15 working days depending on complexity. Expedited services are available upon request.
How much sample is required for testing? Generally, 50 to 200 grams of dried herbal material or finished product is sufficient for most single-item determinations. Comprehensive testing packages covering multiple parameters may require up to 500 grams. Samples should be sealed in airtight containers to preserve volatile and oxidation-sensitive constituents.
Which standards are followed during testing? Methods are primarily based on the Chinese Pharmacopoeia (2020 Edition), with complementary procedures from USP, Ph. Eur., AOAC International, and GB national standards. Client-submitted or proprietary specifications can also be accommodated following method suitability verification.
Can unknown or unexpected compounds be identified? Yes. Using high-resolution LC-MS/MS and GC-MS with mass spectral database searching, our laboratory can perform non-targeted screening to identify unknown constituents, degradation products, or adulterants such as undeclared synthetic pharmaceuticals.
Do you provide method development and validation services? Yes. For novel herbal materials, extracts without established monographs, or products requiring custom specifications, our scientists develop and fully validate analytical methods according to ICH Q2 (R2) guidelines, delivering validation reports suitable for regulatory submission.