spectrometry

Glutarylcarnitine (O-glutaroyl-L-carnitine) is a diagnostic metabolite for malonic aciduria and glutaric aciduria type I monitored in most tandem mass spectrometry newborn screening programmes.

Taurohyodeoxycholic acid (THDCA) is a taurine-conjugated form of the secondary bile acid hyodeoxycholic acid .1THDCA decreases the size and weight of human gallstonesin vitro. It increases bile flow, biliary cholesterol secretion, and biliary lipid secretion in rats.2Co-administration of THDCA with taurochenodeoxycholic acid prevents TCDCA-induced hepatotoxicity, increasing bile flow as well as biliary acid and phospholipid secretion in rats.3THDCA also reduces myeloperoxidase activity, expression of TNF-α and IL-6, and colonic damage in a mouse model of TNBS-induced ulcerative colitis.4Taurohyodeoxycholic acid MaxSpec standard is a quantitative grade standard of taurohyodeoxycholic acid (sodium salt) that has been prepared specifically for mass spectrometry and related applications where quantitative reproducibility is required. The solution has been prepared gravimetrically and is supplied in a deactivated glass ampule sealed under argon. The concentration was verified by comparison to an independently prepared calibration standard. Verified concentration is provided on the certificate of analysis. This taurohyodeoxycholic acid MaxSpec standard is guaranteed to meet identity, purity, stability, and concentration specifications and is provided with a batch-specific certificate of analysis. Ongoing stability testing is performed to ensure the concentration remains accurate throughout the shelf life of the product.Note: The amount of solution added to the vial is in excess of the listed amount. Therefore, it is necessary to accurately measure volumes for preparation of calibration standards. Follow recommended storage and handling conditions to maintain product quality.

Cholesteryl behenate is a standard in electrospray ionization tandem mass spectrometry for the analysis of cholesteryl esters and cholesterol.

Lasiocarpine N-oxide is a natural compound found to be higher in many tea bags, herbal drugs and honey by mass spectrometry.

6-Hydroxynicotinic acid (6-Hydroxypyridine-3-carboxylic acid) is exploited in the use of NMR spectroscopy or gas chromatography--mass spectrometry for the diagnosis of Pseudomonas aeruginosa in urinary tract infection. Among the common bacteria causing urinary infection, only P. aeruginosa produces 6-hydroxynicotinic acid from nicotinic acid.

Flavone glycoside from Robinia with antibacterial and diuretic properties; derived from kaempferol.The ability of robinin to reverse the multidrug resistance of the human colon cancer cell line Colo 320 expreβing MDR1/LRP was explored by monitoring their uptake of Rhodamine 123, but was shown to have minimal effect. Robinin (NSC-9222) was detected in lysates of the human breast cancer cell line MCF-7 using liquid chromatography-tandem maβ spectrometry.