Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 2,516

The DOI matches its Crossref record.

Fluorometric Determination of Chlorophyll

Holm-Hansen, O., Lorenzen, C. J., Holmes, R. W., Strickland, J. D. H.·1965·ICES Journal of Marine Science

Abstract

The concentration of chlorophyll in laboratory grown cultures of marine phytoplankton and in oceanic samples has been determined both by measurement of fluorescence and by measurement of light absorption. The lower limit for detection of chlorophyll by fluorescence with the instrumentation described is about 0·01 μg chlorophyll a, which is about 5% that required for a spectro-photometric determination. Through choice of appropriate filters, the amount of fluorescence reflects either the chlorophyll a concentration or the sum of chlorophylls a and c. By measurement of fluorescence before and after acidification, the ratio of chlorophyll to phaeophytin can be readily determined. Dilute HCl is superior to oxalic acid for acidification of pigment extracts. As the fluorometric determination of chlorophyll and phaeophytin is fast, reliable and sensitive, it will be very useful in field studies of productivity.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1093/icesjms/30.1.3

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 2,516

Metadata

Authors
Holm-Hansen, O., Lorenzen, C. J., Holmes, R. W., & Strickland, J. D. H.
Venue
ICES Journal of Marine Science
Published
1965-12-01
Volume
30
Issue
1
Pages
3-15
ISSN
  • 1054-3139 (ISSN-L)
  • 1095-9289
OpenAlex
W2164689991
Cited by
2,516
References
0
FWCI
18.84
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Fluorometric Determination of Chlorophyll. https://app.cochat.ai/papers/10.1093/icesjms/30.1.3
The paper
Holm-Hansen, O., Lorenzen, C. J., Holmes, R. W., & Strickland, J. D. H. (1965). Fluorometric Determination of Chlorophyll. ICES Journal of Marine Science. https://doi.org/10.1093/icesjms/30.1.3

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.