13726 Results for: "Starfish Multi Experiment Workstation"

Supplier: SPEX CERTIPREP LLC

Pesticides, PCBs and Herbicides

The EPA is tasked with the monitoring of environmental systems as they pertain to contamination and human health. The methods issued by the EPA are created to respond to specific toxins or persistent organic pollutants (POPs) found in environmental samples such as soil, source water, drinking water, and waste. In particular, pollutants such as polychlorinated biphenyls (PCBs), which were in widespread industrial use up until their restriction, are of concern due to their stable and persistent nature in the environment. Another group of chemicals of high concern is the hundreds of commercial pesticides and herbicides in use in the world today. Pesticides, from algaecides to virucides, are used in large quantities in industrial and private agriculture. The concern over human pesticide exposure over the past few decades has led to extensive monitoring of these pesticides. It has been reported that over 98% of insecticides and 95% of herbicides affect areas other than their intended target product. It is essential that monitoring agencies have accurate standard mixes to measure the pesticide levels in the environment.

Many new pesticides are now being tested using highly sensitive LC/MS techniques, in addition to traditional GC techniques, to determine minute amounts of residue in environmental samples and food products.

At SPEX CertiPrep, we facilitate ease of monitoring and testing of pesticides by creating pesticide test mixes to suit your monitoring needs. SPEX CertiPrep is the leader in offering pesticide standards designed to work within EPA, AOAC and FDA analytical testing methods using all of the leading analytical techniques: LC, LC/MS, GC, and GC/MS. Many pesticide standard mixes are readily available in our catalog along with a large list of single pesticide standards. In addition, custom pesticide mixes can be made to your specifications to create a mix that meets your needs.

US EPA Method 531 is an analytical method for the monitoring of n-methylcarbamoyloximes and n-methylcarbamates in drinking water and ground water by HPLC and a fluorescence detector

Supplier: Restek

Contains: Benzene (71-43-2); Bromobenzene (108-86-1); Bromochloromethane (74-97-5); Bromodichloromethane (75-27-4); Bromoform (75-25-2); n-Butylbenzene (104-51-8); sec-Butylbenzene (135-98-8); tert-Butylbenzene (98-06-6); Carbon tetrachloride (56-23-5); Chlorobenzene (108-90-7); Chloroform (67-66-3); 2-Chlorotoluene (95-49-8); 4-Chlorotoluene (106-43-4); Dibromochloromethane (124-48-1); 1,2-Dibromo-3-chloropropane (DBCP) (96-12-8); 1,2-Dibromoethane (EDB) (106-93-4); Dibromomethane (74-95-3); 1,2-Dichlorobenzene (95-50-1); 1,3-Dichlorobenzene (541-73-1); 1,4-Dichlorobenzene (106-46-7); 1,1-Dichloroethane (75-34-3); 1,2-Dichloroethane (107-06-2); 1,1-Dichloroethene (75-35-4); cis-1,2-Dichloroethene (156-59-2); trans-1,2-Dichloroethene (156-60-5); 1,2-Dichloropropane (78-87-5); 1,3-Dichloropropane (142-28-9); 2,2-Dichloropropane (594-20-7); 1,1-Dichloropropene (563-58-6); cis-1,3-Dichloropropene (10061-01-5); trans-1,3-Dichloropropene (10061-02-6); Ethylbenzene (100-41-4); Hexachloro-1,3-butadiene (hexachlorobutadiene) (87-68-3); Isopropylbenzene (cumene) (98-82-8); 4-Isopropyltoluene (p-cymene) (99-87-6); Methylene chloride (dichloromethane) (75-09-2); Naphthalene (91-20-3); n-Propylbenzene (103-65-1); Styrene (100-42-5); 1,1,1,2-Tetrachloroethane (630-20-6); 1,1,2,2-Tetrachloroethane (79-34-5); Tetrachloroethene (127-18-4); Toluene (108-88-3); 1,2,3-Trichlorobenzene (87-61-6); 1,2,4-Trichlorobenzene (120-82-1); 1,1,1-Trichloroethane (71-55-6); 1,1,2-Trichloroethane (79-00-5); Trichloroethene (79-01-6); 1,2,3-Trichloropropane (96-18-4); 1,2,4-Trimethylbenzene (95-63-6); 1,3,5-Trimethylbenzene (108-67-8); m-Xylene (108-38-3); o-Xylene (95-47-6); p-Xylene (106-42-3)

Supplier: GILSON, INC.

This compact, ergonomic system is an easy to use and accurate solution for high throughput pipetting of 96- and 384-well plates. The PLATEMASTER's 96-channel design greatly reduces the number of pipetting steps necessary to fill a microplate when compared to using regular manual multichannel pipettes. When using this, the time it takes to fill 96-well plates is significantly reduced to approximately 10 to 20 seconds or less, and 384-wells can typically be filled in less than a minute using only four pipetting steps.

Supplier: SPEX CERTIPREP LLC

Pesticides, PCBs and Herbicides

The EPA is tasked with the monitoring of environmental systems as they pertain to contamination and human health. The methods issued by the EPA are created to respond to specific toxins or persistent organic pollutants (POPs) found in environmental samples such as soil, source water, drinking water, and waste. In particular, pollutants such as polychlorinated biphenyls (PCBs), which were in widespread industrial use up until their restriction, are of concern due to their stable and persistent nature in the environment. Another group of chemicals of high concern is the hundreds of commercial pesticides and herbicides in use in the world today. Pesticides, from algaecides to virucides, are used in large quantities in industrial and private agriculture. The concern over human pesticide exposure over the past few decades has led to extensive monitoring of these pesticides. It has been reported that over 98% of insecticides and 95% of herbicides affect areas other than their intended target product. It is essential that monitoring agencies have accurate standard mixes to measure the pesticide levels in the environment.

Many new pesticides are now being tested using highly sensitive LC/MS techniques, in addition to traditional GC techniques, to determine minute amounts of residue in environmental samples and food products.

At SPEX CertiPrep, we facilitate ease of monitoring and testing of pesticides by creating pesticide test mixes to suit your monitoring needs. SPEX CertiPrep is the leader in offering pesticide standards designed to work within EPA, AOAC and FDA analytical testing methods using all of the leading analytical techniques: LC, LC/MS, GC, and GC/MS. Many pesticide standard mixes are readily available in our catalog along with a large list of single pesticide standards. In addition, custom pesticide mixes can be made to your specifications to create a mix that meets your needs.

US EPA Method 508 is an analytical method for the monitoring of organochlorine pesticides and PCBs in drinking water and ground water by GC/ECD

Supplier: SPEX CERTIPREP LLC

Pesticides, PCBs and Herbicides

The EPA is tasked with the monitoring of environmental systems as they pertain to contamination and human health. The methods issued by the EPA are created to respond to specific toxins or persistent organic pollutants (POPs) found in environmental samples such as soil, source water, drinking water, and waste. In particular, pollutants such as polychlorinated biphenyls (PCBs), which were in widespread industrial use up until their restriction, are of concern due to their stable and persistent nature in the environment. Another group of chemicals of high concern is the hundreds of commercial pesticides and herbicides in use in the world today. Pesticides, from algaecides to virucides, are used in large quantities in industrial and private agriculture. The concern over human pesticide exposure over the past few decades has led to extensive monitoring of these pesticides. It has been reported that over 98% of insecticides and 95% of herbicides affect areas other than their intended target product. It is essential that monitoring agencies have accurate standard mixes to measure the pesticide levels in the environment.

Many new pesticides are now being tested using highly sensitive LC/MS techniques, in addition to traditional GC techniques, to determine minute amounts of residue in environmental samples and food products.

At SPEX CertiPrep, we facilitate ease of monitoring and testing of pesticides by creating pesticide test mixes to suit your monitoring needs. SPEX CertiPrep is the leader in offering pesticide standards designed to work within EPA, AOAC and FDA analytical testing methods using all of the leading analytical techniques: LC, LC/MS, GC, and GC/MS. Many pesticide standard mixes are readily available in our catalog along with a large list of single pesticide standards. In addition, custom pesticide mixes can be made to your specifications to create a mix that meets your needs.

US EPA Method 8082 is an analytical method for the monitoring of PCBs in environmental samples by GC/ECD or GC/ELCD

Supplier: Restek

Contains: 30439: 502.2 Calibration Mix #1 (gases); Bromomethane (methyl bromide) (74-83-9); Chloroethane (ethyl chloride) (75-00-3); Chloromethane (methyl chloride) (74-87-3); Dichlorodifluoromethane (CFC-12) (75-71-8); Trichlorofluoromethane (CFC-11) (75-69-4); Vinyl chloride (75-01-4);30432: 502.2 MegaMix Standard; Benzene (71-43-2); Bromobenzene (108-86-1); Bromochloromethane (74-97-5); Bromodichloromethane (75-27-4); Bromoform (75-25-2); n-Butylbenzene (104-51-8); sec-Butylbenzene (135-98-8); tert-Butylbenzene (98-06-6); Carbon tetrachloride (56-23-5); Chlorobenzene (108-90-7); Chloroform (67-66-3); 2-Chlorotoluene (95-49-8); 4-Chlorotoluene (106-43-4); Dibromochloromethane (124-48-1); 1,2-Dibromo-3-chloropropane (DBCP) (96-12-8); 1,2-Dibromoethane (EDB) (106-93-4); Dibromomethane (74-95-3); 1,2-Dichlorobenzene (95-50-1); 1,3-Dichlorobenzene (541-73-1); 1,4-Dichlorobenzene (106-46-7); 1,1-Dichloroethane (75-34-3); 1,2-Dichloroethane (107-06-2); 1,1-Dichloroethene (75-35-4); cis-1,2-Dichloroethene (156-59-2); trans-1,2-Dichloroethene (156-60-5); 1,2-Dichloropropane (78-87-5); 1,3-Dichloropropane (142-28-9); 2,2-Dichloropropane (594-20-7); 1,1-Dichloropropene (563-58-6); cis-1,3-Dichloropropene (10061-01-5); trans-1,3-Dichloropropene (10061-02-6); Ethylbenzene (100-41-4); Hexachloro-1,3-butadiene (hexachlorobutadiene) (87-68-3); Isopropylbenzene (cumene) (98-82-8); 4-Isopropyltoluene (p-cymene) (99-87-6); Methylene chloride (dichloromethane) (75-09-2); Naphthalene (91-20-3); n-Propylbenzene (103-65-1); Styrene (100-42-5); 1,1,1,2-Tetrachloroethane (630-20-6); 1,1,2,2-Tetrachloroethane (79-34-5); Tetrachloroethene (127-18-4); Toluene (108-88-3); 1,2,3-Trichlorobenzene (87-61-6); 1,2,4-Trichlorobenzene (120-82-1); 1,1,1-Trichloroethane (71-55-6); 1,1,2-Trichloroethane (79-00-5); Trichloroethene (79-01-6); 1,2,3-Trichloropropane (96-18-4); 1,2,4-Trimethylbenzene (95-63-6); 1,3,5-Trimethylbenzene (108-67-8); m-Xylene (108-38-3); o-Xylene (95-47-6); p-Xylene (106-42-3)

Supplier: Restek

Contains: 30042: 502.2 Calibration Mix #1 (gases); Bromomethane (methyl bromide) (74-83-9); Chloroethane (ethyl chloride) (75-00-3); Chloromethane (methyl chloride) (74-87-3); Dichlorodifluoromethane (CFC-12) (75-71-8); Trichlorofluoromethane (CFC-11) (75-69-4); Vinyl chloride (75-01-4);30431: 502.2 MegaMix Standard; Benzene (71-43-2); Bromobenzene (108-86-1); Bromochloromethane (74-97-5); Bromodichloromethane (75-27-4); Bromoform (75-25-2); n-Butylbenzene (104-51-8); sec-Butylbenzene (135-98-8); tert-Butylbenzene (98-06-6); Carbon tetrachloride (56-23-5); Chlorobenzene (108-90-7); Chloroform (67-66-3); 2-Chlorotoluene (95-49-8); 4-Chlorotoluene (106-43-4); Dibromochloromethane (124-48-1); 1,2-Dibromo-3-chloropropane (DBCP) (96-12-8); 1,2-Dibromoethane (EDB) (106-93-4); Dibromomethane (74-95-3); 1,2-Dichlorobenzene (95-50-1); 1,3-Dichlorobenzene (541-73-1); 1,4-Dichlorobenzene (106-46-7); 1,1-Dichloroethane (75-34-3); 1,2-Dichloroethane (107-06-2); 1,1-Dichloroethene (75-35-4); cis-1,2-Dichloroethene (156-59-2); trans-1,2-Dichloroethene (156-60-5); 1,2-Dichloropropane (78-87-5); 1,3-Dichloropropane (142-28-9); 2,2-Dichloropropane (594-20-7); 1,1-Dichloropropene (563-58-6); cis-1,3-Dichloropropene (10061-01-5); trans-1,3-Dichloropropene (10061-02-6); Ethylbenzene (100-41-4); Hexachloro-1,3-butadiene (hexachlorobutadiene) (87-68-3); Isopropylbenzene (cumene) (98-82-8); 4-Isopropyltoluene (p-cymene) (99-87-6); Methylene chloride (dichloromethane) (75-09-2); Naphthalene (91-20-3); n-Propylbenzene (103-65-1); Styrene (100-42-5); 1,1,1,2-Tetrachloroethane (630-20-6); 1,1,2,2-Tetrachloroethane (79-34-5); Tetrachloroethene (127-18-4); Toluene (108-88-3); 1,2,3-Trichlorobenzene (87-61-6); 1,2,4-Trichlorobenzene (120-82-1); 1,1,1-Trichloroethane (71-55-6); 1,1,2-Trichloroethane (79-00-5); Trichloroethene (79-01-6); 1,2,3-Trichloropropane (96-18-4); 1,2,4-Trimethylbenzene (95-63-6); 1,3,5-Trimethylbenzene (108-67-8); m-Xylene (108-38-3); o-Xylene (95-47-6); p-Xylene (106-42-3)

Supplier: MP Biomedicals

Urea is the principal end product of nitrogen metabolism in most mammals, formed by the enzymatic reactions of the Kreb's cycle.
Urea is a mild agent usually used in the solubilization and denaturation of proteins. It is also useful for renaturing proteins from samples already denatured with 6 M guanidine hydrochloride such as inclusion bodies; and in the extraction of the mitochondrial complex. It is commonly used to solubilize and denature proteins for denaturing isoelectric focusing and two-dimensional electrophoresis and in acetic acid-urea PAGE gels. Urea is used in cell or tissue culture media to increase the osmolality. Urea has also been used as fertilizer because of the easy availability of nitrogen; in animal feeds; it is reacted with aldehydes to make resins and plastics; condensed with malonic ester to form barbituric acid; used in the paper industry to soften cellulose; used as a diuretic; enhances the action of sulfonamides; an antiseptic.
Urea in solution is in equilibrium with ammonium cyanate. The form that reacts with protein amino groups is isocyanic acid. Urea in the presence of heat and protein leads to carbamylation of the proteins. Carbamylation by isocyanic acid interferes with protein characterization because isocyanic acid reacts with the amino terminus of proteins, preventing N-terminal sequencing. Isocyanic acid also reacts with side chains of lysine and arginine residues resulting in a protein that is unsuitable for many enzymatic digests. In addition, carbamylation often leads to confusing results from peptides having unexpected retention times and masses. When performing enzymatic protein digests it is important to remove urea first. Even though some enzymes will tolerate small amounts of urea, the elevated temperature used for most reactions will lead to carbamylation during the course of the digest. The urea can be removed prior to digestion by fast reversed phase chromatography, spin columns, or dialysis.
Dissolve urea in deionized water to the desired concentration.For every 10 ml of solution, add 1 g of Amberlite® IRA-910.Stir for one hour at room temperature

Supplier: Restek

Contains: Acetonitrile (75-05-8); Acrylonitrile (107-13-1); Allyl chloride (3-chloropropene) (107-05-1); Benzene (71-43-2); Bromobenzene (108-86-1); Bromochloromethane (74-97-5); Bromodichloromethane (75-27-4); Bromoform (75-25-2); n-Butylbenzene (104-51-8); sec-Butylbenzene (135-98-8); tert-Butylbenzene (98-06-6); Carbon disulfide (75-15-0); Carbon tetrachloride (56-23-5); Chlorobenzene (108-90-7); 2-Chloroethanol (107-07-3); Chloroform (67-66-3); Chloroprene (2-chloro-1,3-butadiene) (126-99-8); 2-Chlorotoluene (95-49-8); 4-Chlorotoluene (106-43-4); Dibromochloromethane (124-48-1); 1,2-Dibromo-3-chloropropane (DBCP) (96-12-8); 1,2-Dibromoethane (EDB) (106-93-4); Dibromomethane (74-95-3); 1,2-Dichlorobenzene (95-50-1); 1,3-Dichlorobenzene (541-73-1); 1,4-Dichlorobenzene (106-46-7); cis-1,4-Dichloro-2-butene (1476-11-5); trans-1,4-Dichloro-2-butene (110-57-6); 1,1-Dichloroethane (75-34-3); 1,2-Dichloroethane (107-06-2); 1,1-Dichloroethene (75-35-4); cis-1,2-Dichloroethene (156-59-2); trans-1,2-Dichloroethene (156-60-5); 1,2-Dichloropropane (78-87-5); 1,3-Dichloropropane (142-28-9); 2,2-Dichloropropane (594-20-7); 1,1-Dichloropropene (563-58-6); cis-1,3-Dichloropropene (10061-01-5); trans-1,3-Dichloropropene (10061-02-6); Diethyl ether (ethyl ether) (60-29-7); 1,4-Dioxane (123-91-1); Ethylbenzene (100-41-4); Ethyl methacrylate (97-63-2); Hexachloro-1,3-butadiene (87-68-3); Iodomethane (methyl iodide) (74-88-4); Isobutyl alcohol (2-methyl-1-propanol) (78-83-1); Isopropylbenzene (cumene) (98-82-8); 4-Isopropyl toluene (p-Cymene) (99-87-6); Methacrylonitrile (126-98-7); Methyl acrylate (96-33-3); Methyl methacrylate (80-62-6); Methylene chloride (dichloromethane) (75-09-2); Naphthalene (91-20-3); Nitrobenzene (98-95-3); 2-Nitropropane (79-46-9); Pentachloroethane (76-01-7); Propionitrile (107-12-0); n-Propylbenzene (103-65-1); Styrene (100-42-5); 1,1,1,2-Tetrachloroethane (630-20-6); 1,1,2,2-Tetrachloroethane (79-34-5); Tetrachloroethene (127-18-4); Tetrahydrofuran (109-99-9); Toluene (108-88-3); 1,2,3-Trichlorobenzene (87-61-6); 1,2,4-Trichlorobenzene (120-82-1); 1,1,1-Trichloroethane (71-55-6); 1,1,2-Trichloroethane (79-00-5); Trichloroethene (79-01-6); 1,2,3-Trichloropropane (96-18-4); 1,1,2-Trichlorotrifluoroethane (CFC-113) (76-13-1); 1,2,4-Trimethylbenzene (95-63-6); 1,3,5-Trimethylbenzene (108-67-8); m-Xylene (108-38-3); o-Xylene (95-47-6); p-Xylene (106-42-3)

Supplier: Restek

Contains: 30042: 502.2 Calibration Mix #1 (gases); Bromomethane (methyl bromide) (74-83-9); Chloroethane (ethyl chloride) (75-00-3); Chloromethane (methyl chloride) (74-87-3); Dichlorodifluoromethane (CFC-12) (75-71-8); Trichlorofluoromethane (CFC-11) (75-69-4); Vinyl chloride (75-01-4);30431: 502.2 MegaMix Standard; Benzene (71-43-2); Bromobenzene (108-86-1); Bromochloromethane (74-97-5); Bromodichloromethane (75-27-4); Bromoform (75-25-2); n-Butylbenzene (104-51-8); sec-Butylbenzene (135-98-8); tert-Butylbenzene (98-06-6); Carbon tetrachloride (56-23-5); Chlorobenzene (108-90-7); Chloroform (67-66-3); 2-Chlorotoluene (95-49-8); 4-Chlorotoluene (106-43-4); Dibromochloromethane (124-48-1); 1,2-Dibromo-3-chloropropane (DBCP) (96-12-8); 1,2-Dibromoethane (EDB) (106-93-4); Dibromomethane (74-95-3); 1,2-Dichlorobenzene (95-50-1); 1,3-Dichlorobenzene (541-73-1); 1,4-Dichlorobenzene (106-46-7); 1,1-Dichloroethane (75-34-3); 1,2-Dichloroethane (107-06-2); 1,1-Dichloroethene (75-35-4); cis-1,2-Dichloroethene (156-59-2); trans-1,2-Dichloroethene (156-60-5); 1,2-Dichloropropane (78-87-5); 1,3-Dichloropropane (142-28-9); 2,2-Dichloropropane (594-20-7); 1,1-Dichloropropene (563-58-6); cis-1,3-Dichloropropene (10061-01-5); trans-1,3-Dichloropropene (10061-02-6); Ethylbenzene (100-41-4); Hexachloro-1,3-butadiene (hexachlorobutadiene) (87-68-3); Isopropylbenzene (cumene) (98-82-8); 4-Isopropyltoluene (p-cymene) (99-87-6); Methylene chloride (dichloromethane) (75-09-2); Naphthalene (91-20-3); n-Propylbenzene (103-65-1); Styrene (100-42-5); 1,1,1,2-Tetrachloroethane (630-20-6); 1,1,2,2-Tetrachloroethane (79-34-5); Tetrachloroethene (127-18-4); Toluene (108-88-3); 1,2,3-Trichlorobenzene (87-61-6); 1,2,4-Trichlorobenzene (120-82-1); 1,1,1-Trichloroethane (71-55-6); 1,1,2-Trichloroethane (79-00-5); Trichloroethene (79-01-6); 1,2,3-Trichloropropane (96-18-4); 1,2,4-Trimethylbenzene (95-63-6); 1,3,5-Trimethylbenzene (108-67-8); m-Xylene (108-38-3); o-Xylene (95-47-6); p-Xylene (106-42-3);30300: 524 Calibration Mix #7A; Acetone (67-64-1); 2-Butanone (MEK) (78-93-3); 2-Hexanone (591-78-6); 4-Methyl-2-pentanone (MIBK) (108-10-1); Tetrahydrofuran (109-99-9);30304: 524 Calibration Mix #7B; Acrylonitrile (107-13-1); Allyl chloride (3-chloropropene) (107-05-1); Ethyl methacrylate (97-63-2); Methyl acrylate (96-33-3); Methyl methacrylate (80-62-6); Nitrobenzene (98-95-3); Pentachloroethane (76-01-7);30203: 524 Calibration Mix #8; Carbon disulfide (75-15-0); Chloroacetonitrile (107-14-2); 1-Chlorobutane (Butyl chloride) (109-69-3); trans-1,4-Dichloro-2-butene (110-57-6); 1,1-Dichloro-2-propanone (513-88-2); Diethyl ether (ethyl ether) (60-29-7); Hexachloroethane (67-72-1); Iodomethane (methyl iodide) (74-88-4); Methacrylonitrile (126-98-7); Methyl tert-butyl ether (MTBE) (1634-04-4); 2-Nitropropane (79-46-9); Propionitrile (107-12-0);30201: 524 Internal Standard/Surrogate Mix; 1-Bromo-4-fluorobenzene (BFB) (460-00-4); 1,2-Dichlorobenzene-d4 (2199-69-1); Fluorobenzene (462-06-6)

Supplier: ARCO

Demonstrates charge distribution on hollow conductors.

Supplier: ARCO

Large, vivid demonstration of light rays through a solid material.

Supplier: AOBChem USA

When linens need to feel as clean as they look, trust Downy® professional fabric softener.

Supplier: KIDDER MFG. CO. LTD

Build a functional vacuum cleaner to explore air pressure and mechanical design.

Supplier: KIDDER MFG. CO. LTD

Build a simple lamp to explore series circuits and electrical energy conversion.

Supplier: KIDDER MFG. CO. LTD

Demonstrates simple circuits with light and sound in a hands-on game building activity.