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2. Reversed-phase chromatography - Wikipedia

   en.wikipedia.org/wiki/Reversed-phase_chromatography

   The United States Pharmacopoeia (USP) has classified HPLC columns by L# types. [20] The most popular column in this classification is an octadecyl carbon chain (C18)-bonded silica (USP classification L1). [21] This is followed by C8-bonded silica (L7), pure silica (L3), cyano-bonded silica (CN) (L10) and phenyl-bonded silica (L11).

3. List of character tables for chemically important 3D point groups

   en.wikipedia.org/wiki/List_of_character_tables...

   The body of the tables contain the characters in the respective irreducible representations for each respective symmetry operation, or set of symmetry operations. The symbol i used in the body of the table denotes the imaginary unit: i 2 = −1. Used in a column heading, it denotes the operation of inversion.

4. High-performance liquid chromatography - Wikipedia

   en.wikipedia.org/wiki/High-performance_liquid...

   Narrow-bore columns (1–2 mm) are used for applications when more sensitivity is desired either with special UV-vis detectors, fluorescence detection or with other detection methods like liquid chromatography-mass spectrometry. Capillary columns (under 0.3 mm) are used almost exclusively with alternative detection means such as mass spectrometry.

5. Monolithic HPLC column - Wikipedia

   en.wikipedia.org/wiki/Monolithic_HPLC_column

   A monolithic HPLC column, or monolithic column, is a column used in high-performance liquid chromatography (HPLC). The internal structure of the monolithic column is created in such a way that many channels form inside the column. The material inside the column which separates the channels can be porous and functionalized.

6. C18 - Wikipedia

   en.wikipedia.org/wiki/C18

   C18, an octadecyl-type hydrocarbon with 18 carbon atoms, such as Fatty acids such as Stearic acid, C 18 H 36 O 2; Oleic acid C 18 H 34 O 2; C18 bonded silica stationary phase column, a type of reversed-phase chromatography column; IEC 60320 C18, a power connector; Colorectal cancer (ICD-10 code)

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8. Two-dimensional chromatography - Wikipedia

   en.wikipedia.org/wiki/Two-dimensional_chromatography

   Two different chromatographic columns are connected in sequence, and the effluent from the first system is transferred onto the second column. [1] Typically the second column has a different separation mechanism, so that bands that are poorly resolved from the first column may be completely separated in the second column. (For instance, a C18 ...

9. List of saturated fatty acids - Wikipedia

   en.wikipedia.org/wiki/List_of_saturated_fatty_acids

   C18:0 Nonadecylic acid: Nonadecanoic acid CH 3 (CH 2) 17 COOH C19:0 Arachidic acid: Icosanoic acid CH 3 (CH 2) 18 COOH C20:0 Heneicosylic acid: Heneicosanoic acid CH 3 (CH 2) 19 COOH C21:0 Behenic acid: Docosanoic acid CH 3 (CH 2) 20 COOH C22:0 Tricosylic acid: Tricosanoic acid CH 3 (CH 2) 21 COOH C23:0 Lignoceric acid: Tetracosanoic acid CH 3 ...