| Main Title |
Gravimetric Technique for the Preparation of Accurate Trace Organic Gas Standards. Interim Report January-December 1984. |
| Author |
Rhoderick, G. C. ;
Cuthrell, W. F. ;
Zielinski, W. L. ;
|
| CORP Author |
National Bureau of Standards (NML), Gaithersburg, MD. Gas and Particulate Science Div.;Environmental Monitoring Systems Lab., Research Triangle Park, NC. |
| Year Published |
1987 |
| Report Number |
EPA/600/4-86/006; |
| Stock Number |
PB87-145736 |
| Additional Subjects |
Gravimetric analysis ;
Standards ;
Gases ;
Hazardous materials ;
Trace elements ;
Concentration(Composition) ;
Gas cylinders ;
Organic compounds ;
Chemical analysis ;
Air pollution detections ;
Reference materials ;
Volatile organic compounds
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB87-145736 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
12p |
| Abstract |
An accurate procedure based on micro-gravimetry has been used for the preparation of volatile, hazardous organic chemicals in a nitrogen matrix in pressurized gas cylinders at analyte concentrations ranging from 10 ppb to 10 ppm, by mole. In this technique, the organics of interest are individually weighed into separate glass capillary tubes using a micro-analytical balance. The tubes are sealed, and subsequently broken in a fixed line connected to an evacuated cylinder. A known weight of pre-analyzed matrix gas (nitrogen) is then used to pressurize the cylinder, and the concentrations of the organics are calculated on a molar basis relative to the number of moles of the matrix gas. A number of these gravimetric primary mixtures have been prepared and analytically intercompared using gas chromatography (GC) with flame-ionization detection (FID). Excellent agreement has been found between analyte concentration values prepared gravimetrically and concentration values determined by analysis. |
| Supplementary Notes |
See also report dated 1985, PB85-207397. Sponsored by Environmental Monitoring Systems Lab., Research Triangle Park, NC. |
| PUB Date Free Form |
Jan 87 |
| Category Codes |
99A; 68A |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/08 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
709318600 |
| Origin |
NTIS |
| Type |
CAT |
