ASTM D8280 Determination of the Blooming of Brominated Flame Retardants by Ion Chromatography

Scope:

ASTM D8280 test method uses the ion exchange chromatographic technique to measure the bromide that comes out of the flame retardant on the surface of the plastic. This method is highly efficient, and a large amount of bromide is collected within the desired period. Through charge basis in ion-exchange chromatography, bromide is easily separated. Among all the flame retardants, brominated ones are frequently used because they are quite effective on plastic surfaces.

Procedure:

The ASTM D8280 test method involves the aging of the two plastic material samples at 70°C for 14 and 35 days. Unaged material is also used. A flag is made from chromatographic paper to pour the deposit from both the aged and unaged surfaces. This is then followed by the Schöniger method. During this method, the sample is mixed with pure oxygen, which is absorbed by the sodium hydroxide solution. Now, ion exchange chromatography is used to estimate the congregation of the bromide into the solution. In the end, the total amount of bromide obtained from the flame retardant that comes out on the surface of the plastic is calculated with the help of an integrator or data analyzer.

Data:

The following equation is used in ASTM D8280 to calculate the blooming of the bromide:

BL (μg ⁄ cm²)= [((Csa × Vsa ÷ Ssa) -B) ×100/ Rec]

BL=BL₁+BL₂

BL= bromide blooming

BL₁+ BL₂= blooming of flame retardant through the first and second flag of filter paper

Conclusion:

ASTM D8280 test method uses the ion exchange chromatographic technique to measure the bromide that comes out of the flame retardant on the surface of the plastic.