The object of the present development is to overcome the defects of the previous art and give a technique for establishing the decabromodiphenyl ether web content in plastics by fluid chromatography. The here and now invention recommends to entirely liquify DecaBDE together with solid plastic, converting the huge mass transfer resistance in between strong and liquid into the small mass transfer resistance inside the liquid stage, consequently substantially decreasing the moment of evaluation and handling. The innovation can promptly examine the decabromodiphenyl ether flame resistant material in plastics of various digital and electric products. These digital and electric items include televisions, computers, mobile phones, etc. The primary components of their plastics are polystyrene, high-impact polystyrene and abdominal resin.
The object of the present innovation is achieved with the following technical remedies.
The approach for establishing the DecaBDE web content in plastics by liquid chromatography includes the adhering to steps: liquify the plastic in tetrahydrofuran to develop an option, and after that centrifuge the service; take the supernatant and do microfiltration, and the filtrate is the remedy to be examined by chromatography; usage high-performance fluid chromatography Establish the decabromodiphenyl ether web content in the solution to be evaluated by chromatography.
Technique for identifying DecaBDE material in plastics by liquid chromatography, including the complying with actions
( 1) Accumulate plastic solids and crush them; take 0.5-1.0 g of the smashed solids, include 50-150mL tetrahydrofuran, and mix to liquify the solids to acquire a service;
( 2) Take 2-10mL of the remedy, centrifuge for more than 3 minutes, take in the supernatant and undertake microfiltration, and the filtrate is the remedy to be tested;
( 3) Use high-performance fluid chromatography to identify the decabromodiphenyl ether web content in the service to be evaluated.
The plastic material in the remedy was less than 10 mg/mL.
The dissolving time is 10-30 mins to completely dissolve.
The microfiltration is executed by utilizing a filter membrane with a pore dimension less than 0.46 μm that is immune to tetrahydrofuran.
The resolution embraces high performance fluid chromatography exterior standard approach.
The mobile stage of the high performance fluid chromatography takes on a combined solvent of tetrahydrofuran and methanol with a volume ratio of 90:10.
The high-performance liquid chromatography makes use of an ultraviolet detector with a wavelength of 300 nm.
The centrifugal rate is greater than 1000 rpm.