Home > Technical Articles > Dithiothreitol 1,4-Dithiothreitol (DTT) is commonly used in biochemical research to protect sulfhydryl groups from oxidation or reduce disulfide linkages to free sulfhydryl groups in proteins and enzymes. DTT is also known as Cleland's reagent. OHOH | | HS-CH2-CH-CH-CH2-S...

Home > Technical Articles > Calcium Carbonate Calcium carbonate is used in a large variety of products: antacids, adhesives, cement, paint, plastics, paper, pharmaceuticals, mineral supplements, and much more. Calcium carbonate is one of the materials we test most frequently. Originally we started w...

Home > Technical Articles > Tween 80 Tween 80 (also known as Polysorbate 80) is used in the manufacture of protein solution formulations to help solubilize and stabilize the protein. It is one of a series of materials (including Tween 20, 40 and 60) which are fatty acid esters of sorbitan polyethoxy...

Home > Technical Articles > XRF XRF is an elemental analysis technique with unique capabilities including (1) highly accurate determinations for major elements and (2) a broad elemental survey of the sample composition without standards. For example, XRF is used in analysis of rocks and metals with ...

Home > Technical Articles > Mercury We no longer offer Mercury analysis using this technique. Mercury (Hg) analysis can be performed using atomic fluorescence (AF) spectroscopy. In the Leeman Labs Hydra AF Gold Plus system, mercury is determined using the traditional cold vapor technique coupled wit...