Cookies
Potřebujeme váš souhlas k využití jednotlivých dat, aby se vám mimo jiné mohly ukazovat informace týkající se vašich zájmů. Souhlas udělíte kliknutím na tlačítko „OK“.
ASTM D3760-12
Standard Test Method for Analysis of Isopropylbenzene (Cumene) by Gas Chromatography
Automaticky přeložený název:
Standardní zkušební metoda pro analýzu isopropylbenzen ( kumenu ) plynovou chromatografií
NORMA vydána dne 15.12.2012
Informace o normě:
Označení normy: ASTM D3760-12
Poznámka: NEPLATNÁ
Datum vydání normy: 15.12.2012
Kód zboží: NS-24757
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM D3760-12 :
Keywords:
alpha methylstyrene, analysis by gas chromatography, benzene, butylbenzene, cumene, ethylbenzene, isopropylbenzene, nonaromatic hydrocarbons, propylbenzene, ICS Number Code 71.080.10 (Aliphatic hydrocarbons)
Doplňující informace
| Significance and Use | ||
|
4.1 This test method is suitable for setting specifications on the materials referenced in 1.2 and for use as an internal quality control tool where isopropylbenzene is produced or is used in a manufacturing process. It may also be used in development or research work involving isopropylbenzene. 4.2 This test method is useful in determining the purity of isopropylbenzene with normal impurities present including diisopropylbenzenes. If extremely high boiling or unusual impurities are present in the isopropylbenzene, this test method would not necessarily detect them and the purity calculation would be erroneous. 4.3 Cumene hydroperoxide, if present, will yield decomposition products that will elute in the chromatogram thereby giving incorrect results. 4.4 The nonaromatic hydrocarbons commonly present from the isopropylbenzene manufacturing process will interfere with the determination of benzene when Column A in |
Column A |
Column B |
|
Detector |
Flame Ionization |
Flame Ionization |
|
Column: |
|
|
|
Tubing |
fused silica |
fused silica |
|
Stationary phase |
polyethylene glycol |
methyl silicone |
|
Solid support |
crosslinked |
crosslinked |
|
Film thickness |
0.25 μ |
0.5 μ |
|
Length, m |
50 |
50 |
|
Diameter, mm |
0.32 mm ID |
0.32 mm ID |
|
Temperatures: |
|
|
|
Injector, °C |
275 |
275 |
|
Detector, °C |
300 |
300 |
|
Oven: |
|
|
|
Initial, °C |
60 |
35 |
|
Time 1, min |
10 |
10 |
|
Final, °C |
175 |
275 |
|
Rate, °C/min |
10 |
5 |
|
Time 2, min |
10 |
0 |
|
Carrier gas |
hydrogen |
helium |
|
Flow rate, mL/min |
1.0 |
1.0 |
|
Split ratio |
100:1 |
100:1 |
|
Sample size, μL |
1.0 |
1.0 |
4.5 The internal standard must be sufficiently resolved from any impurity and the isopropylbenzene peak.
1.1 This test method covers the determination of the purity of isopropylbenzene (cumene) by gas chromatography.
1.2 This test method has been found applicable to the measurement of impurities such as nonaromatic hydrocarbons, benzene, ethylbenzene, t-butylbenzene, n-propylbenzene, alpha-methylstyrene, sec-butylbenzene, and diisopropylbenzene, which are common to the manufacturing process of isopropylbenzene. Limit of detection for these impurities is 10 mg/kg (see 1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and determine
the applicability of regulatory limitations prior to use.
Standard Practice for Sampling and
Handling Liquid Cyclic Products Standard Practice for Packed Column Gas
Chromatography Standard Practice for Gas Chromatography
Terms and Relationships (Includes all amendments and changes
4/28/2021). Standard Practice for Conducting an
Interlaboratory Study to Determine the Precision of a Test
Method Standard Guide for Quality Control and
Quality Assurance Procedures for Aromatic Hydrocarbons and Related
Materials Standard Practice for Using Significant
Digits in Test Data to Determine Conformance with
Specifications Standard Practice for Installing Fused
Silica Open Tubular Capillary Columns in Gas Chromatographs
