Small‑Peptide Profiling of Ejiao

Small‑Peptide Profiling of Ejiao (Colla Corii Asini) – Accurate Characterisation & Quality Control Service

You are searching for small molecule peptide detection in Ejiao because you need to perform this assay—whether to authenticate donkey‑hide gelatin, detect adulteration with bovine or porcine collagen, quantify bioactive low‑molecular‑weight peptides, or ensure batch‑to‑batch consistency for nutraceutical manufacturing. We offer a complete analytical service that combines high‑resolution mass spectrometry, peptidomics, and advanced separation techniques to deliver unambiguous peptide‑level identification and quantitation.

What We Detect – From Peptide Fingerprints to Low‑Abundance Bioactive Sequences

Our Ejiao small‑peptide detection goes far from simple hydroxyproline or total nitrogen tests. Using nano‑UHPLC coupled with Orbitrap Fusion™ Lumos Tribrid™ MS (120,000 resolution at m/z 200), we resolve peptides down to 300 Da with full sequence coverage. We identify species‑specific marker peptides (donkey, bovine, porcine, equine) at 0.1% (w/w) adulteration level via parallel reaction monitoring (PRM). We also quantify the absolute abundance of up to 30 characteristic peptides (e.g., collagen‑derived Gly‑X‑Y repeats, crosslinking telopeptides) using stable isotope‑labelled internal standards (AQUA™). For bioactivity, we screen for peptides with reported antioxidant, ACE‑inhibitory, or haematopoietic activity (e.g., Pro‑Hyp, Hyp‑Gly, Ala‑Hyp‑Gly) and report their concentrations in µg/g.

How Deep We Go – Peptidomics, Molecular Weight Distribution & Post‑Translational Modifications

We don't just report “peptides present”. Our service includes comprehensive peptidomics (data‑dependent acquisition, DDA) with search against custom gelatin databases (donkey, cow, pig, horse, goat, camel) to generate full peptide inventory (typically 800‑1,500 unique peptide sequences per sample). We measure molecular weight distribution by SEC‑MALS (size‑exclusion chromatography with multi‑angle light scattering) with 1 Da resolution in the 0.5‑10 kDa range, distinguishing genuine small peptides from larger gelatin fragments. For post‑translational modifications, we quantify hydroxylation degree of proline/lysine and deamidation hotspots – key indicators of processing severity. Our MALDI‑TOF/TOF imaging even maps peptide spatial distribution across solid Ejiao cake sections.

Why Our Ejiao Peptide Detection Stands Out – Specificity, Traceability & Regulatory Alignment

1. Species authentication guaranteed: We maintain a reference spectral library of >5,000 collagen‑derived peptides from 12 animal species, including rare ones (camel, water buffalo, yak). Our machine‑learning classifier (random forest) achieves 99.6% accuracy for donkey identity even in complex mixtures.
2. Ultra‑low detection limit for adulterants: Using PRM with scheduled retention times, we detect bovine peptides at 0.05% (w/w) and porcine peptides at 0.1% – far below regulatory thresholds.
3. Full digestion‑free & digestion‑assisted workflows: We offer direct analysis of native small peptides (no trypsin) to preserve endogenous bioactive sequences, plus targeted digestion for total collagen peptide mapping.
4. Stability & processing impact: We can compare freshly prepared Ejiao vs. aged or over‑heated samples by monitoring peptide degradation markers (increase in free amino acids, loss of Hyp‑containing dipeptides).
5. Regulatory acceptance: Our methods follow Chinese Pharmacopoeia (2020 edition) draft for Ejiao authenticity as well as AOAC international guidelines for food peptidomics. Reports include all raw MS spectra, extracted ion chromatograms, and statistical confidence scores.

Who Relies on Our Ejiao Peptide Testing – Real‑World Impact

Leading manufacturers of Ejiao‑based health products use our service for raw material release testing – one client rejected three batches that contained 2‑5% bovine peptides undetectable by PCR or ELISA. Another company developing hydrolysed Ejiao oligopeptide formulations relied on our molecular weight profile and bioactivity peptide quantitation to optimise their enzymatic hydrolysis process, achieving a 3‑fold increase in the target Pro‑Hyp dipeptide. Regulatory labs have sent us blind proficiency test samples; we correctly identified species and adulterant levels in 20/20 samples, with 0% false positives.

Ready to Run Your Small‑Peptide Ejiao Detection?

Send us raw Ejiao solid (≥2 g), gelatin powder (≥1 g), finished capsules (5 units), or liquid hydrolysate (≥1 mL). We will perform sample preparation (enzymatic or non‑enzymatic), nano‑LC‑HRMS acquisition, peptidomics data processing, species authenticity evaluation, and quantitative reporting – all within 5‑7 business days. Request a free consultation; we will tailor the detection panel (species markers, bioactive peptides, MW distribution) to your specific need.