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A good introduction to the partial least squares (Projection to Latent Structures, PLS) method is given by Geladi and Kowalski (15). The purpose of the present study is to investigate the potential of FT-IR spectrometry to quantify ASA in pharmaceutical preparations.
Formula: C 9 H 8 O 4. Molecular weight: 180.1574. IUPAC Standard InChI: InChI=1S/C9H8O4/c1-6 (10)13-8-5-3-2-4-7 (8)9 (11)12/h2-5H,1H3, (H,11,12) IUPAC Standard InChIKey: BSYNRYMUTXBXSQ-UHFFFAOYSA-N. CAS Registry Number: 50-78-2. Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file.
5 lip 2006 · The reaction between the acidic hydrolysis product of the aspirin with the mixture of FeCl 3 and potassium hexacyanoferrate (ΙΙΙ) was evaluated for the spectrophotometric determination of the...
31 maj 1996 · The structures of acetylsalicylic acid (aspirin) (I) and its oxyanion (II) have been studied by means of infrared spectra and ab initio 3–21 G force field calculations. The 3100–1100 cm −1 region bands of both the aspirin molecule and its oxyanion have been assigned.
1 sie 2022 · In this paper, the reaction of synthesize aspirin catalyzed by sulfuric acid was monitored by using in situ real-time FT-IR spectroscopy. By the study of experimental conditions and the optimization of the model, the absorption spectra of aspirin reaction system were well resolved.
The IR spectrophotometry aims to identify the active substance and compare these types of aspirin. Figure 3 shows the IR spectra for three different types of aspirin tablets (simple (A2), aspirin buffered (A5) and effervescent aspirin (A7)). Figure 3. FTIR spectra of simple aspirin (A2), bufferedand (A5) and effervescent (A7).
1. Spectrum A is an IR spectrum of just air (a background spectrum). i) Using your knowledge of IR spectroscopy, assign the peaks in the IR spectrum and fill in table A below.
