L-Carnitine Testing Services
L-Carnitine is a quaternary ammonium compound essential for transport of long-chain fatty acids into mitochondria for beta-oxidation. It is widely used in injectable lipotropic blends where identity and concentration verification are critical.
Research Applications
Common research areas for L-Carnitine
- Fatty acid metabolism
- Mitochondrial transport
- Lipotropic blend QC
- Sports medicine research
Peptide Information
Molecular details and sample requirements
Sequence / Structure:
β-hydroxy-γ-trimethylammoniobutyrate (small molecule)
Molecular Weight
161.20 g/mol
Formula
C7H15NO3
Recommended Purity
≥95%
Sample Size
2-5 mg lyophilized
Our L-Carnitine Testing Services
Comprehensive analytical testing to ensure L-Carnitine quality and purity
Purity Testing
HPLC analysis to verify L-Carnitine purity levels
Identity Verification
Mass spectrometry to confirm molecular identity
Third-Party Verification
Independent COA verification for L-Carnitine
Certificate of Analysis
Official US laboratory documentation
Ready to test your peptides?
Send your peptide name, sample count, and the tests you need. We return a fixed-price quote, usually within one business day.
- validated analytical methods, independent of any supplier
- 9-11 business day standard turnaround
- Traceable COA with chromatograms and method parameters
L-Carnitine Testing Methodology
Our analytical workflow for L-Carnitine follows USP <1225> guidance for validated chromatographic methods. Each lot is processed by a credentialed analyst with documented chain of custody.
Step 1
Sample intake & chain of custody
Your L-Carnitine sample (2-5 mg lyophilized) is logged at our Florida lab with a unique ID, photographed, and stored at -20 °C until analysis.
Step 2
Reverse-phase HPLC purity
L-Carnitine is dissolved in mobile phase and run on a C18 column with a water/acetonitrile gradient containing 0.1% TFA. UV detection at 214 nm quantifies the main peak and any related impurities.
Step 3
LC-MS identity confirmation
An aliquot is analyzed by liquid chromatography-mass spectrometry. The observed monoisotopic mass is compared against the theoretical molecular weight (161.20 g/mol) for L-Carnitine to confirm identity.
Step 4
Impurity profiling & reporting
Related substances, truncations, and oxidation products are quantified. Findings are compiled into a signed Certificate of Analysis with chromatograms, mass spectra, and analyst interpretation.
L-Carnitine Purity Notes
Recommended research-grade purity for L-Carnitine is ≥95%. Lot-to-lot variation is common with solid-phase synthesis, so independent verification matters.
Common impurities to watch
- Truncated sequences from incomplete coupling
- Deletion peptides missing one or more residues
- Oxidation of methionine, tryptophan, or cysteine
- Residual TFA, acetate, or solvent counter-ions
- Aggregates and dimers from improper storage
What our COA confirms
- Main peak purity by HPLC area %
- Observed vs theoretical mass (161.20 g/mol)
- Named impurities ≥ 0.1% area
- Net peptide content where applicable
- Method, column, and instrument metadata
L-Carnitine Handling, Storage & Safety
Guidance below is for laboratory and research personnel only. L-Carnitine is supplied for research use and is not intended for human or veterinary use.
Storage
Store lyophilized L-Carnitine at -20 °C, protected from light and moisture. After reconstitution, aliquot and store at -80 °C; avoid repeated freeze-thaw cycles.
Reconstitution
Reconstitute in bacteriostatic or sterile water in a clean environment. Allow vials to reach room temperature before opening to prevent moisture condensation on the powder.
PPE & shipping
Handle with gloves, lab coat, and eye protection. Ship samples to ACS overnight on dry ice or cold packs in a rigid, leak-proof container with a packing slip referencing your quote.
This page is informational and does not constitute medical advice. Consult your institution's safety officer and SDS before working with L-Carnitine.
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