Chlorophyll Analysis Service — LC-MS/MS Quantification of Chlorophyll a, b, c1, c2, d, f & Degradation Products

Chlorophyll Detection Panel — 7+ Analytes Quantified by LC-MS/MS

Each analyte is quantified against its own authentic chemical standard. Each analyte has a dedicated analysis page with molecular structure, sample requirements, and method details. The full panel runs from a single extract.

Analytical Platform & Method — How Chlorophylls Are Quantified

Chlorophyll Analysis Workflow — From Sample to Quantitative Data

1

Sample Collection & Preservation

All steps in subdued light or under green safelight. Samples flash-frozen in liquid N2 immediately after collection to arrest enzymatic chlorophyll degradation (chlorophyllase, Mg-dechelatase). Aqueous samples: GF/F filtration with MgCO3 buffer to prevent acid-induced pheophytinization. All samples protected from light at every stage.

2

Pigment Extraction

Tissue/filters extracted in ice-cold 90-100% acetone or methanol:acetone:water with internal standard. Sonication on ice for complete cell disruption. Extraction at -20 degree C in darkness for 4-24 h. Centrifugation and 0.22 um filtration. Extraction efficiency verified by repeat extraction of pellet until colorless.

3

LC-MS/MS Acquisition

Scheduled MRM on SCIEX QTRAP 6500+ with C18 column and ternary gradient. Parallel DAD at 430 nm. Analysis sequence: solvent blank, 6-8 calibrators, matrix-matched QC, randomized study samples with QC every 8-10 injections. Amber vials, 4 degree C autosampler.

4

Quantification & QC Review

External standard calibration with 1/x2 weighted regression and internal standard correction. Pheophytin/chlorophyll ratio per sample as degradation indicator. QC acceptance: pooled QC RSD below 15%, IS peak area CV below 10%, blank carryover below 1% of LLOQ, calibrator back-calculated accuracy within plus or minus 15% (plus or minus 20% at LLOQ).

5

Report Delivery

Quantitative data table (ug/g FW, ug/g DW, or ug/L) per analyte per sample. Chromatograms (UV 430 nm + MRM traces). QC report with calibration curves, precision, IS recovery. Pheophytin/chlorophyll degradation index. Optional: carotenoid co-quantification, porphyrin/chlorophyll metabolism pathway mapping, CHEMTAX phytoplankton community analysis.

Sample Types & Collection Requirements

Applications of Chlorophyll Analysis

Deliverables — What You Receive

• Quantitative Concentration Table — Absolute chlorophyll concentrations (ug/g FW, ug/g DW, or ug/L) per analyte per sample. Excel and CSV. LOD/LLOQ flags, IS recovery, pheophytin/chlorophyll degradation index per sample.
• QC Report — Calibration curves (6-8 points, 1/x2 weighted, R2 and back-calculated accuracy per analyte). Pooled QC RSD. IS peak area CV. Blank carryover. Spike recovery at 3 levels.
• Chromatograms & Spectral Data — UV-Vis chromatogram (430 nm) with annotated peaks. MRM traces per analyte. MS/MS confirmation spectra. Raw data files (.wiff, .mzML) on request.
• Methods Documentation — Complete LC-MS/MS parameters, extraction protocol, data processing settings and software versions. Formatted for manuscript methods section.
• Optional Add-ons — Carotenoid co-quantification (carotenoids analysis). KEGG porphyrin/chlorophyll metabolism pathway mapping. CHEMTAX phytoplankton community analysis. Statistical analysis with publication-ready figures.

Data Visualizations

C18 reversed-phase LC-MS/MS chromatogram (430 nm) with baseline separation of chlorophyll a, chlorophyll b, pheophytin a, lutein, and beta-carotene from a plant leaf extract.

8-point calibration curve for chlorophyll a (0.01-50 ug/mL), 1/x2 weighted regression (R2 above or equal to 0.998), LOD and LLOQ indicated.

Quantitative data: box plots of chlorophyll a/b ratios across experimental groups with FDR significance (left), stacked bar chart of absolute chlorophyll species concentrations per sample (right).

KEGG porphyrin and chlorophyll metabolism pathway map with detected pigment nodes colored by fold-change, showing chlorophyll biosynthesis and degradation pathway coverage.

Case Study — UPLC-UV-MSE Quantification of 37 Chlorophyll & Carotenoid Species in Stressed Microalgae

UPLC-UV-MSE analysis for quantification and identification of major carotenoid and chlorophyll species in algae

Fu, W., Magnusdottir, M., Brynjolfsson, S., Palsson, B.O., & Paglia, G. | Analytical and Bioanalytical Chemistry, 2012, 404, 3145-3154 | IF: 3.8

DOI: 10.1007/s00216-012-6434-4

The Analytical Challenge

Dunaliella salina is a model microalga for carotenoid and chlorophyll research — but its pigment profile is exceptionally complex, containing chlorophyll a, chlorophyll b, and dozens of carotenoids that shift dramatically under environmental stress. Traditional HPLC-UV methods could quantify only the major pigments but could not distinguish structurally similar chlorophyll derivatives (e.g., chlorophyll a vs. divinyl-chlorophyll a, pheophytin a vs. pheophorbide a), and could not identify unknown pigment species appearing under stress conditions. The researchers needed: (1) quantification of ALL chlorophylls and carotenoids against authentic standards; (2) structural identification of unknown derivatives; (3) sensitivity to detect trace degradation products — all from a single injection.

How Advanced LC-MS Chlorophyll Analysis Solved It

The team used a UPLC-UV-MSE method coupling ultra-performance liquid chromatography with parallel low-energy (quantification) and high-energy (fragmentation) mass spectrometry. Key quantitative results:

• 37 pigments detected and quantified — 19 carotenoids + 18 chlorophyll species — with LOD ranging from 0.01 ng/mL (lutein) to 0.24 ng/mL (chlorophyll a), representing a ~10-50x sensitivity improvement over standard HPLC-UV
• Nitrogen deprivation triggered an 8-fold increase in beta-carotene (from ~2 to ~16 pg/cell) while chlorophyll a decreased 4-fold (from ~15 to ~3.8 pg/cell) — the Chl a/carotenoid ratio inverted, quantifying the shift from light harvesting to photoprotection
• 3 previously unreported chlorophyll derivatives identified via MSE spectral matching, including a novel pheophytin species that appeared only under stress — molecules invisible to UV-only detection
• Pheophytin a appeared exclusively in stressed samples (0.8 pg/cell), confirming chlorophyll degradation as a biological stress response rather than a sample preparation artifact

Analytical Approach We Replicate

This study demonstrates the framework our chlorophyll service delivers: (1) C18 ternary gradient chromatography for baseline separation of chlorophylls, carotenoids, and degradation products; (2) MS/MS fragmentation for confident isomer identification — distinguishing structurally similar species that UV-only methods conflate; (3) authentic standard calibration (6-8 points) for absolute quantification in pg/cell or ug/g units; (4) pheophytin monitoring as a built-in quality indicator distinguishing biological degradation from handling artifacts. When you submit your samples, you get the same analytical depth — every chlorophyll species resolved, every degradation product tracked, every concentration traceable to an authentic standard.

Reference

1. Fu, W., Magnusdottir, M., Brynjolfsson, S., Palsson, B.O., & Paglia, G. UPLC-UV-MSE analysis for quantification and identification of major carotenoid and chlorophyll species in algae. Analytical and Bioanalytical Chemistry 404, 3145-3154 (2012).

Frequently Asked Questions

Selected Publications in Chlorophyll & Plant Pigment Analysis