Reference health
Large Phase Ratio Spontaneous Extraction Followed by GC–MS for the Determination of Caffeine in Beverages
22/22 checkable references clean · checked 2026-07-23
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
2 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 22 checked references that resolve
resolves10.2105/AJPH.80.9.1106
Caffeine-containing beverages, total fluid consumption, and premenstrual syndrome.
resolves10.1016/j.foodchem.2007.10.024
Measurement of caffeine in coffee beans with UV/vis spectrometer
resolves10.1039/an9921700777
Background-correction methods for the determination of caffeine in beverages, coffee and tea by using second-derivative ultraviolet spectrophotometry
resolves10.1016/S0308-8146(02)00116-4
Rapid determination of caffeine content in soft drinks using FTIR–ATR spectroscopy
resolves10.1016/S0026-265X(03)00095-X
Determination of caffeine in black tea leaves by Fourier transform infrared spectrometry using multiple linear regression
resolves10.1021/ac026262w
Development and Validation of a Near-Infrared Method for the Quantitation of Caffeine in Intact Single Tablets
resolves10.1016/j.microc.2006.01.023
Simultaneous determination of total polyphenols and caffeine contents of green tea by near-infrared reflectance spectroscopy
resolves10.1016/j.jfca.2003.09.009
Simultaneous determination of catechins, caffeine and other phenolic compounds in tea using new HPLC method
resolves10.1016/S0002-8223(97)00047-3
Caffeine Content of Fountain and Private-Label Store Brand Carbonated Beverages
resolves10.1016/S0308-8146(99)00228-9
HPLC/diode-array applied to the thermal degradation of trigonelline, nicotinic acid and caffeine in coffee
resolves10.1590/S0100-879X2001000600019
Comparison of the quantification of caffeine in human plasma by gas chromatography and ELISA
resolves10.1021/jf034634b
Capillary Electrophoretic Determination of Theanine, Caffeine, and Catechins in Fresh Tea Leaves and Oolong Tea and Their Effects on Rat Neurosphere Adhesion and Migration
resolves10.1002/(SICI)1097-0010(199605)71:1<41::AID-JSFA546>3.0.CO;2-I
Authentication of Coffee Bean Variety by Near-infrared Reflectance Spectroscopy of Dried Extract
resolves10.1021/jf9813743
Application of Near-Infrared Reflectance Spectroscopy to the Simultaneous Prediction of Alkaloids and Phenolic Substances in Green Tea Leaves
resolves10.1016/j.aca.2005.01.064
Analysis of caffeine, theobromine and theophylline in coffee by near infrared spectroscopy (NIRS) compared to high-performance liquid chromatography (HPLC) coupled to mass spectrometry
resolves10.1016/0021-9673(92)85360-6
Solventless determination of caffeine in beverages using solid-phase microextraction with fused-silica fibers
resolves10.1016/j.chroma.2007.09.020
Rapid determination of caffeine in one drop of beverages and foods using drop-to-drop solvent microextraction with gas chromatography/mass spectrometry
resolves10.1016/j.chroma.2006.09.061
Simple and environmental friendly procedure for the gas chromatographic–mass spectrometric determination of caffeine in beverages
The 2 references without a DOI — listed, not checked
no DOI — not checkedWelsch CW, DeHoog JV, O’Connor DH (1988) Cancer Res 48:2078
no DOI — not checkedDing MZ, Zou JK (2008) J Chinese Anal Chem 36:381
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