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Certified Spiking Solutions® of the internal standards Testosterone-2,3,4-13C3 & (±)-Normetanephrine-D3 HCl are now available.

Testosterone-2,3,4-13C3, T-070
100 ug/mL in Acetonitrile

A stable-labeled internal standard for monitoring serum testosterone levels in men, women, and children by LC-MS/MS. The Centers for Disease Control (CDC) Hormone Standardization Project cites Testosterone-2,3,4-13C3 as the internal standard of choice for measurement of testosterone at low concentrations in biological fluids by LC-MS/MS. For these analyses, 13C-labeled internal standards can eliminate potential issues of isotopic exchange and minimize separation of later-eluting analytes from a higher substituted deuterium-labeled internal standard. Acetonitrile was chosen as diluent for its ease of handling and miscibility with water and biological specimens.

(±)-Normetanephrine-D3 HCl, N-068
100 ug/mL (as free base) in Methanol

Normetanephrine, a metabolite of norepinephrine, is a marker for catecholamine-secreting tumors such as pheochromocytoma. This internal standard is suitable for LC-MS/MS monitoring of normetanephrine levels in urine or plasma for diagnostic testing or endocrinology.

Coming soon, Cerilliant will offer 13C-labeled internal standards of other hormones including 17β-Estradiol and 17α-Hydroxyprogesterone.

Cerilliant Certified Solution Standards and Certified Spiking Solutions are manufactured to the highest industry standards. We are accredited to ISO 17034 and ISO/IEC 17025 & certified ISO 9001.

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