A sampler for brominated flame retardants in indoor air and its sampling and determination method
A brominated flame retardant, indoor air technology, applied in the field of analysis and detection, can solve problems such as loss of target compound background, cumbersome process, pollution, etc.
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Embodiment 1
[0062](1) sample collection
[0063]The sampler of the bromo-flame retardant is subjected to a solid phase extraction column, a flow meter (Rules 0 to 25 L / min), the diaphragm vacuum pump (maximum pumping rate 20 L / min), is sequentially connected by silicone tubes,figure 1 Indicated. Among them, the solid phase extraction strip has two, parallel, each pillar having an inner diameter of 12.8 mm, an outer diameter of 14.7mm, a height of 68mm; each pillar is filled with 250 mgcnwbond HC-C18 filler and 250mg cnWbond NH2The filler (the particle size of the filler is 40 ~ 63μm, the aperture)Ion exchange capacity 1.6Meq / g), the two fillers are not mixed, and there is a glass fiber sieve plate, and the CNWBOND HC-C18 filler is located on the upper layer, CNWBond NH.2The filler is located in the lower layer.
[0064]Air sample collection in three different rooms in the same hotel. Pre-use of 4 mL of methanol, 4 ml of ethyl acetate, 4 ml of dichloromethane, 4 ml of n-hexane, and sealed in the...
Embodiment 2
[0076](1) sample collection
[0077]The sampler is in Example 1.
[0078]Air sample collection is performed in 4 different dorms of the same dormitory. Pre-use of 4 mL of methanol, 4 ml of ethyl acetate, 4 ml of dichloromethane, 4 ml of n-hexane, and sealed in the polypropylene bag and sealed in the polypropylene bag and sealed in the polypropylene bag. The sampling device is placed at a height from the ground 1.2m, the sampling rate is about 4.0 l / min, and the sample collection time is 8h. After the sample is completed, the solid phase extraction strip is still wrapped in aluminum foil, sealed in the polypropylene bag, transported back to the laboratory as soon as possible, stored in the refrigerator of -20 ° C, to be treated.
[0079](2) Sample treatment
[0080]Before the solid phase extraction column was eluted, 5 ng of polyabrominated phenyl ether (PBDES) inner standard and 5 ng of brominated flame retardant (NBFRS) in the small column filler, wherein the polyabiniphenyl ether isaped (no...
Embodiment 3
[0091](1) sample collection
[0092]The sampler is in Example 1.
[0093]Air sample collection in three different rooms in the same family room. Pre-use of 4 mL of methanol, 4 ml of ethyl acetate, 4 ml of dichloromethane, 4 ml of n-hexane, and sealed in the polypropylene bag and sealed in the polypropylene bag and sealed in the polypropylene bag. The sampling device is placed at a height from the ground 1.2m, the sampling rate is about 4.0 l / min, and the sample collection time is 8h. After the sample is completed, the solid phase extraction strip is still wrapped in aluminum foil, sealed in the polypropylene bag, transported back to the laboratory as soon as possible, stored in the refrigerator of -20 ° C, to be treated.
[0094](2) Sample treatment
[0095]Before the solid phase extraction column was eluted, 5 ng of polyabrominated phenyl ether (PBDES) inner standard and 5 ng of brominated flame retardant (NBFRS) in the small column filler, wherein the polyabiniphenyl ether isaped (non-mass)...
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