ΜΑΝΟSTAT
1
NEW AUTOMATIC NEW CHEMICALS High-Purity Metallic Fluorides Over 26 metallic fluorides of extra high purity are now available. These fluorides are easily converted to depo- sition metals of purities otherwise not obtainable. These materials are guar- anteed to conform to stated quality specifications. United Mineral & Chemical Corp., 129 Hudson St., New York, Ν. Υ. 10013. 212-966-4330 501 TLC Spray Reagents Four reagents, three of which have not been offered before, are available for thin-layer chromatography visuali- zation. They are ninhydrin, potassium iodoplatinate, bismuth subnitrate, and silver acetate. Ninhydrin is used with such items as amino acids, peptides, and proteins; iodoplatinate detects bio- tin, analgesics, narcotics, some alka- loids, amino acids, peptides, amines, and bases. Bismuth subnitrate is used for the visualization of cholin phosphatides, amines, and alkaloids, and silver acetate detects barbiturates. A 12-page catalog describes these reagents and equipment to be used with them. Quantum In- dustries, 341 Kaplan Dr., Fairfield, N.J. 07006. 201-227-4880 502 Laboratory Lubricants Two new general-purpose laboratory lubricants are available to end problems stemming from jammed stopcocks and dismantling of apparatus with ground glass joints. The new greases are resis- tant to a wide range of organic solvents and are said not to leak out of joints. In the lubrication of buret taps, resis- tance has been shown to acid and alkali solutions. One of the greases, AP 100, is a high vacuum grease for use down to 5 X 10-" torr at 15°C, with a soften- ing point of 30°C. The other, AP 101, is a general-purpose grease compa- rable in price to other laboratory greas- es. It is designed for moderate vacuum use down to 10 -1 torr and has a soften- ing point of 185°C. Bulletin ST J de- scribes these products. James G. Biddle Co., Plymouth Meeting, Pa. 19462. 215-646-9200 503 Triglyceride and Lipid Determinations Kits are available for the determina- tion of triglycerides by a fluorometric method and for the determination of total lipids by a colorimetric method. Both kits contain all reagents and stan- dards needed for about 40 determina- tions. Alpha Associates, 4536 New- portsville Rd., Levittown, Pa. 19056 504 vmm ELECTRON!AGNETICALLY CONTROLLED DILUTING MACHINE safely handles acids, bases, solvents without error, waste, contamination or effort...every time! Pushbutton-controlled DILUTROL does away forever with cross-contamination and waste of precious sam- ple! Provides precise pickup of adjustable predeter- mined amount of sample with repeatable accuracy of ±0.3%, continuous diluent delivery with an accuracy ±0.5%. Permits dilution ratio up to 1,000:1. Rinsing action of diluent cleans tip for next cycle! Removable dispensing head rotates through 120 degrees, makes possible operation at distances up to 4 feet. The ex- clusive electromagnetic check valve assures positive repeatability and provides exclusive airlock between sample and diluent; fluids touch only Teflon and glass. Operates on 115 volts AC. Available either with 1.0 ML sample and 10 ML diluent max. capacity or with 0.5 ML sample and 10 ML diluent capacity. DILUTROL from $383.25 MANOSTAT DIVISION OF GREINER SCIENTIFIC CORP., 20 N. Moore St., Dept. 521, New York 10013 Available through your laboratory supply dealers Circle No. 58 on Readers' Service Card A TYPICAL total time 6 minutes FROM RAW SAMPLE TO GAS CHROMATOGRAPHY Silylation makes possible the gas chromatographic analysis of thousands of compounds not formerly amenable to GC and eases the problems of the GC analysis of many other polar substances. Most silylation techniques are rapid and easy, transforming many intractable substances into vola- tile and thermally stable trimethyIsilyl ethers that give sym- metrical GC peaks. We have just published a 60 page "Handbook of Silylation" that is a gold mine of information on silylation and other special techniques of gas phase analysis. It contains a wealth of practical suggestions, methods, references, data on reagents and accessories. "Handbook of Silylation" is yours for the asking; drop us a note—today. 1 Place 10 mg glucose in vial. 2 Add 1 ml TRI-SIL. 3 Shake to dissolve. Ο Ζ s m s a PIERCE CHEMICAL COMPANY P.O. Box 117 Rockford, Illinois 61105 U.S.A. PHONE 815/968-0747 TWX 910-631-3419 . 4 Allow to stand 5 minutes; withdraw sample for injection. 5 Inject sample into chromatograph. Circle No. 98 on Readers' Service Card ANALYTICAL CHEMISTRY, VOL 42, NO. 8, JULY 1970 · 87 A
Transcript of ΜΑΝΟSTAT
NEW AUTOMATIC N E W
C H E M I C A L S
High-Purity Metallic Fluorides
Over 26 metallic fluorides of extra high purity are now available. These fluorides are easily converted to deposition metals of purities otherwise not obtainable. These materials are guaranteed to conform to stated quality specifications. United Mineral & Chemical Corp., 129 Hudson St., New York, Ν. Υ. 10013. 212-966-4330 501
TLC Spray Reagents
Four reagents, three of which have not been offered before, are available for thin-layer chromatography visualization. They are ninhydrin, potassium iodoplatinate, bismuth subnitrate, and silver acetate. Ninhydrin is used with such items as amino acids, peptides, and proteins; iodoplatinate detects bio-tin, analgesics, narcotics, some alkaloids, amino acids, peptides, amines, and bases. Bismuth subnitrate is used for the visualization of cholin phosphatides, amines, and alkaloids, and silver acetate detects barbiturates. A 12-page catalog describes these reagents and equipment to be used with them. Quantum Industries, 341 Kaplan Dr., Fairfield, N . J . 07006. 201-227-4880 502
Laboratory Lubricants
Two new general-purpose laboratory lubricants are available to end problems stemming from jammed stopcocks and dismantling of apparatus with ground glass joints. The new greases are resistant to a wide range of organic solvents and are said not to leak out of joints. In the lubrication of buret taps, resistance has been shown to acid and alkali solutions. One of the greases, AP 100, is a high vacuum grease for use down to 5 X 10-" torr at 15°C, with a softening point of 30°C. The other, AP 101, is a general-purpose grease comparable in price to other laboratory greases. It is designed for moderate vacuum use down to 10-1 torr and has a softening point of 185°C. Bulletin ST J describes these products. James G. Biddle Co., Plymouth Meeting, Pa. 19462. 215-646-9200 503
Triglyceride and Lipid Determinations
Kits are available for the determination of triglycerides by a fluorometric method and for the determination of total lipids by a colorimetric method. Both kits contain all reagents and standards needed for about 40 determinations. Alpha Associates, 4536 New-portsville Rd., Levittown, Pa. 19056
504
vmm ELECTRON!AGNETICALLY CONTROLLED DILUTING MACHINE safely handles acids, bases, solvents without error, waste, contamination or effort...every time!
Pushbutton-controlled DILUTROL does away forever with cross-contamination and waste of precious sample! Provides precise pickup of adjustable predetermined amount of sample with repeatable accuracy of ± 0 . 3 % , continuous diluent delivery with an accuracy ± 0 . 5 % . Permits dilution ratio up to 1,000:1. Rinsing action of diluent cleans tip for next cycle! Removable dispensing head rotates through 120 degrees, makes possible operation at distances up to 4 feet. The exclusive electromagnetic check valve assures positive repeatability and provides exclusive airlock between sample and diluent; fluids touch only Teflon and glass. Operates on 115 volts AC. Available either with 1.0 ML sample and 10 ML diluent max. capacity or with 0.5 ML sample and 10 ML diluent capacity.
DILUTROL from $383.25
MANOSTAT DIVISION OF GREINER SCIENTIFIC CORP., 20 N. M o o r e St . , D e p t . 5 2 1 , N e w Y o r k 1 0 0 1 3 Available through your laboratory supply dealers
Circle No. 58 on Readers' Serv ice Card
A TYPICAL total time 6 minutes F R O M R A W S A M P L E T O
G A S C H R O M A T O G R A P H Y
Silylation makes possible t he gas ch roma tograph ic analysis of t housands of c o m p o u n d s no t formerly amenab le t o GC and eases t he p rob lems of t he GC analysis of many o the r polar substances . Most silylation t echn iques are rapid and easy, t ransforming m a n y int ractable substances in to volatile and thermal ly stable tr imethyIsi lyl e thers t ha t give symmetrical GC peaks. We have just publ ished a 6 0 page " H a n d b o o k of S i ly la t ion" t ha t is a gold mine of informat ion on silylation and o the r special t echn iques of gas phase analysis. It conta ins a wealth of practical suggestions, m e t h o d s , references, data on reagents and accessories. " H a n d b o o k of S i ly la t ion" is you r s for t he asking; d r o p us a note—today.
1 Place 10 mg glucose in vial.
2 Add 1 ml TRI -SIL .
3 S h a k e t o dissolve.
Ο Ζ s m s a
PIERCE CHEMICAL COMPANY P.O. Box 117 Rockford, Illinois 61105 U.S.A. PHONE 815/968-0747 TWX 910-631-3419 .
4 Allow t o s t and 5 m i n u t e s ; w i t h d r a w sample for inject ion. 5 Inject sample in to
c h r o m a t o g r a p h .
Circle No. 98 on Readers' Service Card
ANALYTICAL CHEMISTRY, VOL 42, NO. 8, JULY 1970 · 87 A
