Industrial epichlorohydrin (4)

4.

According to the instrument manual, adjust the instrument to the operating conditions shown in Table 2, and start the measurement after the instrument is stable

4.

Corrected area normalization method

4.

The mass fraction w _{2 of the} epichlorohydrin content , the value is expressed in %, calculated according to formula (2):

Where:

w ₁ —4.

A ₁ —The area of epichlorohydrin chromatographic peak;

f ₁ - the relative correction factor of epichlorohydrin ;

A _i —the area of ​​the chromatographic peak of a certain component;

f _i — the relative correction factor of a component

Take the arithmetic average of the two parallel determination results as the determination result, and the absolute difference between the two parallel determination results shall not exceed 0.

4.

The arbitration method is capillary column gas chromatography

4.

Measure according to the density meter method specified in GB/T4472-1984

Take the arithmetic average of the two parallel determination results as the result

5 Inspection rules

5.

5.

5.
3 Sampling shall be conducted in accordance with the provisions of GB/T6678-2003 and GB/T6680-2003, the sampling volume shall not be less than 1000mL, divided into two evenly, put into a clean and dry polyethylene bottle or glass bottle, tightly sealed, and attached Label
.
The label should indicate the product name, batch number, sampling date and the name of the sampler
.
One bottle is for inspection and the other bottle is kept for future reference
.

5.
4 Industrial epichlorohydrin should be inspected by the quality supervision and inspection department of the manufacturer
.
The manufacturer shall ensure that each batch of products manufactured meets the requirements of this standard
.
Each batch of products should be accompanied by a certificate of quality of certain formats, including: production plant name and address, product name, lot number or production date, quality grade, net content and standard number and so on
.

5.
5 The judgment of the test result shall be carried out according to the rounding value comparison method specified in GB/T1250
.
If any of the test results does not meet the requirements of this standard, the sampling shall be redoubled for inspection
.
Even if only one index does not meet the requirements of this standard as a result of the re-inspection, the entire batch of products shall be degraded or disqualified
.

6 signs, packaging, transportation and storage

6.
1 Sign

Industrial epichlorohydrin packaging containers should have a firm logo indicating the product name, manufacturer’s name, site, trademark, batch number or production date, quality grade, net content, the number of this standard, and the “yes” specified in GB190-1990.
"Drugs" and "flammable liquids" signs
.

6.
2 Packaging

Industrial epichlorohydrin should be packaged in dry, clean and strong galvanized iron drums
.
The net content of each barrel is generally 200kg, and it can also be packaged according to user requirements
.
The loading capacity of various containers should not exceed 90% of the volume
.

6.
3 Transportation

Industrial epichlorohydrin can be shipped by train or car
.
During loading, unloading and transportation, violent impact should be prevented, and the mouth should be protected from sun and rain, and should meet the requirements of the transportation department
.

6.
4 Storage

Industrial epichlorohydrin should be stored in a warehouse that is dry, ventilated, kept at a temperature below 40°C, fireproof, and explosion-proof, and meets the requirements for storing drugs and dangerous goods.
Under the packaging, transportation and storage conditions in accordance with this standard, The shelf life of industrial epichlorohydrin is 6 months from the point of production
.
It can be re-inspected after the expiry date, and it can still be used if the inspection result meets the requirements of this standard
.

7 security

7.
1 Industrial epichlorohydrin vapor and air can easily form explosive mixtures, which can cause combustion and explosion when exposed to open flames and high heat energy
.
There should be fire-proof and explosion-proof measures: equipped with corresponding types and quantities of fire-fighting equipment
.

7.
2 Skin contact may cause irritation.
Remove contaminated clothing and rinse thoroughly with running water immediately
.
Eye contact may cause severe eye irritation such as tearing and pain.
Immediately rinse with normal saline or running water and seek medical attention
.
If inhaled, leave the scene quickly to fresh air, give oxygen when breathing is difficult, and take emergency treatment measures in severe cases
.
When the concentration of industrial epichlorohydrin in the environment is high, the on-site personnel should take necessary protective measures and wear protective equipment
.