Protein Information

Name C18
Synonyms B1; D1; BBS 9; BBS9; BBS9 GENE; Bardet Biedl syndrome 9 protein; C18; PTH responsive osteosarcoma B1 protein…

Compound Information

Name mercuric chloride
CAS

Reference List

PubMed Abstract RScore(About this table)
9252053 Sorensen LK, Rasmussen BM, Boison JO, Keng L: Simultaneous determination of six penicillins in cows' raw milk by a multiresidue high-performance liquid chromatographic method. J Chromatogr B Biomed Sci Appl. 1997 Jul 4;694(2):383-91.

A high-performance liquid chromatographic method based on C18 solid-phase extraction and ultraviolet detection at 323 nm of analytes derivatized with benzoic anhydride and 1,2,4-triazole mercuric chloride solution was developed for the simultaneous determination of amoxicillin, penicillin G (benzylpenicillin), ampicillin, oxacillin, cloxacillin and dicloxacillin residues in raw milk.
31(0,1,1,1) Details
8012201 Boison JO, Keng LJ, MacNeil JD: Analysis of penicillin G in milk by liquid chromatography. J AOAC Int. 1994 May-Jun;77(3):565-70.

After protein precipitation with sodium tungstate, samples are applied to a C18 solid-phase extraction cartridge, from which penicillin is eluted, derivatized with 1,2,4-triazole-mercuric chloride solution, and analyzed by isocratic liquid chromatography (LC) on a C18 column with UV detection at 325 nm.
31(0,1,1,1) Details
1400719 Boison JO, Korsrud GO, MacNeil JD, Keng L, Papich M: Determination of penicillin G in bovine plasma by high-performance liquid chromatography after pre-column derivatization. J Chromatogr. 1992 May 8;576(2):315-20.

The assay utilizes a simple extraction of penicillin G from plasma (with a known amount of penicillin V added as internal standard) with water, dilute sulphuric acid and sodium tungstate solutions, followed by concentration on a conditioned C18 solid-phase extraction column.
After elution with 500 microliters of elution solution, the penicillins are derivatized with 500 microliters of 1,2,4-triazole-mercuric chloride solution at 65 degrees C for 30 min.
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11770766 Turner A, Millward GE, Le Roux SM: Sediment-water partitioning of inorganic mercury in estuaries. Environ Sci Technol. 2001 Dec 1;35(23):4648-54.


Operational measurements of the speciation of dissolved Hg (II) using Sep-Pak C18 columns indicate a reduction in the proportion of hydrophobic (C18-retained) dissolved Hg (II) complexes with increasing salinity, both in the presence and absence of suspended particles.
1(0,0,0,1) Details
9850572 Boison JO, Keng LJ: Multiresidue liquid chromatographic method for determining residues of mono- and dibasic penicillins in bovine muscle tissues. J AOAC Int. 1998 Nov-Dec;81(6):1113-20.

The penicillins are extracted from bovine tissues with 0.1 M phosphate buffer (pH 8.5), cleaned up on a t-C18 Sep-Pak cartridge, and eluted with 2 mL acetonitrile.
After the acetonitrile in the eluate is evaporated to dryness, the residue is dissolved in 200 microL (40 + 60, v/v) acetonitrile-phosphate buffer (pH 6.5) and derivatized with acetic anhydride and mercuric chloride in the presence of 1,2,4-triazole at 65 degrees C for 30 min.
1(0,0,0,1) Details
3364707 Haginaka J, Wakai J: Liquid chromatographic determination of penicillins by postcolumn alkaline degradation using a hollow-fiber membrane reactor. Anal Biochem. 1988 Jan;168(1):132-40.


This method involves separation of penicillins on a C18 column, postcolumn reaction with sodium hydroxide and mercury (II) chloride introduced into the main flow stream using sulfonated hollow-fiber membrane reactors immersed in each solution (4 M sodium hydroxide and 3 X 10 (-2) M mercury (II) chloride plus 10 (-2) M nitric acid), and detection at 290 nm based on the uv absorbance of the degradation products.
1(0,0,0,1) Details
10435343 McGrane M, O'Keeffe M, Smyth MR: Multi-residue analysis of penicillin residues in porcine tissue using matrix solid phase dispersion. Analyst. 1998 Dec;123(12):2779-83.

Pre-column derivatisation using acetic anhydride and 1,2,4-triazole in the presence of mercuric chloride was employed to allow detection in 325 nm.
Gradient elution was required to elute amoxicillin, ampicillin, penicillin G, cloxacillin and dicloxacillin derivatives from a C18 reversed phase column using phosphate buffer-acetonitrile mobile phase.
1(0,0,0,1) Details
1908452 Boison JO, Salisbury CD, Chan W, MacNeil JD: Determination of penicillin G residues in edible animal tissues by liquid chromatography. J Assoc Off Anal Chem. 1991 May-Jun;74(3):497-501.

The extract is deproteinized with sulfuric acid and sodium tungstate, filtered, and concentrated on a conditioned C18 solid phase extraction column.
Penicillin V and benzyl penicillin are then eluted from the column with 1 mL 60% acetonitrile-35% water-5% 0.2M phosphate buffer solution and derivatized with 1 mL 1,2,4-triazole-mercuric chloride solution at 65 degrees C for 30 min.
1(0,0,0,1) Details