Determination of the Blooming of Brominated Flame Retardants by Ion Chromatography ASTM D8280-20a

Determination of the Blooming of Brominated Flame Retardants by Ion Chromatography ASTM D8280-20a

ASTM D8280-20a test method determines the amount of the brominated flame retardants on the plastic surface. The bromide deposits are collected from the chromatographic paper on the surface of the plastic, and the total amount of bromine obtained through this method is then calculated with the help of an integrator.

    Scope:

    ASTM D8280-20a 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:

    This 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 surface. 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 the 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 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

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