Water and Wastewater Testing Supplies
Hach Company Hach Glass Fiber Filters, 55mm, 100/pk
Hach glass microfiber filters are designed to exceed ASTM and Standard Methods protocols including 2540 C, 2540 D, and 2540 E. Our filters have a smooth surface and are binder-free with unique high temperature resistance. The 1.0 µm retention offers fast speed as well as a very high loading capacity. Hach glass filters are designed to maintain a stable weight before and after treatment in excess of 550 °C. This is an important attribute for customers performing Fixed and Volatile Solids analysis of water and wastewater.
Waters Corp Atmospheric Pressure Ionization Test Solution
Standards kit for system verification of ZMD, QTofI/II/APIUS/Micro, PlatformII, QuattroII, LCT.
Sigma Aldrich Fine Chemicals Biosciences Certified Vial Kit Low Ads
Supelcos new Low Adsorption (LA) vials are manufactured using a process that decreases the number of hydroxyl groups on the vials glass surface significantly reducing surface activity while improving analytical quantitation and minimizing pH shifts in the sample. This same process also removes unwanted surface metals such as sodium and boron that can contaminate samples and interfere with trace analysis. Unlike other methods used to decrease vial surface activity the elimination of surface activity in LA vials is integral to the manufacturing process and is not a chemical surface treatment.These vials and closures are designed engineered and manufactured for optimum performance in HPLC GC/MS and LC/MS applications. All of the parts of the vial system (vial cap and septum) can come into contact with the sample and are critical to the outcome of the analysis. We recommend using LA vials with MSQ polypropylene cap/PTfE silicone septa. This cap and septa combination was purposely d
Sigma Aldrich Fine Chemicals Biosciences Nitrite Assay Kit Griess R
Nitrogen-based ions nitrite and nitrate are found in almost every living organism. furthermore endogenous Nitrite levels are found in mammals and can also be obtained from dietary sources. In humans nitrite is further metabolized to Nitric Oxide and other reactive nitrogen species (nitrogen oxides). The Nitrate-Nitrite-NO biochemical pathway is well known for its participation in cell signaling hypoxiadependent response and regulation of blood flow. Recent studies suggest the reduction of Nitrite to Nitrogen Oxygen in the mitochondria. Specifically myoglobin and xanthine oxidoreductase could generate NO under hypoxic conditions leading to mitochondrial respiration.
Hach Company Formaldehyde 1 Reagent Powder Pillows, pk/100
For high-range formaldehyde determination by drop-count titration. Replacement reagent for FM-1 test kit (2183100). Pack of 100 Powder Pillows.
Hach Company Glycol Test Reagent 1 Powder Pillows, pk/25
For presence/absence detection of glycols by visual test kit. Replacement reagent for Hach Glycol Detection Test Kit - 2186400. Pack of 25 Powder Pillows.
Hach Company Thymolphthalein Indicator Solution, 1 g/L, 15 mL SCDB
pH indicator: Visual transition interval: pH 8.8 (colorless)-pH 10.5 (blue). 15 mL Self-Contained Dropping Bottle. Replacement reagent for FM-1 test kit (2183100).
Sigma Aldrich Fine Chemicals Biosciences Phenol solution | 108-95-2 | MFCD00002143 | 400mL
Phenol solution | Equilibrated with 10 mM Tris HCl, pH 8.0, 1 mM EDTA | MW:94.11 | 108-95-2 | MFCD00002143 | 400mL