Atmospheric Total Suspended Particulate Matter Measurement Laboratory
Atmospheric Total Suspended Particulate Matter Measurement Laboratory
Total suspended particulate (TSP) is particulate matter suspended in the air with an aerodynamic equivalent diameter of ≤100 μm. It originates from solid or liquid water droplets of smoke, dust, soot, or condensed gasification material, and can be suspended in the air for a long time, including carbon based, sulfate and nitrate particles. Currently, the gravimetric method is widely used for the determination of TSP in the air.
Operation method
gravimetric method
Principle
A quantitative volume of air is extracted at a constant speed and passed through the filter membrane which has been constantly weighted in the sampling, then TSP is trapped on the filter membrane, and the concentration of TSP is calculated according to the difference in the weight of the filter membrane before and after the sampling and the sampling volume. The method is divided into high-flow sampler method and medium-flow sampler method.
Materials and Instruments
Air Move 1. Calibrate the flow rate of the sampler with an orifice flow meter. For more product details, please visit Aladdin Scientific website.
Filter Membrane Medium Flow Sampler Medium Flow Orifice Flow Meter U-Tube Differential Pressure Meter X-ray Film Machine Balance Constant Temperature and Humidity Chamber Glass Fiber Filter Membrane Tweezers Filter Membrane Bag
2. Preparation of filter membrane: First, use X-ray machine to check whether there are pinholes or defects in the filter membrane, and then put it into constant temperature and humidity box to equilibrate for 24 h, weigh it, and note down the equilibrium temperature and weight W0, and put it into the filter membrane bag or box.
3. Sampling: Remove the above mentioned filter membrane and place it on the filter membrane net inside the sampling head of the sampler (with the fluffy side facing up) and clamp it with the filter membrane clamp. Sample at a flow rate of 100 L/min for 1h, record the sampling flow rate and the temperature and atmospheric pressure at the site. Remove the membrane gently with tweezers, fold the membrane inward, and place it in a membrane bag or box.
4. Calculation of weighing: After equilibrating the sampling membrane under the same equilibrium conditions as the blank membrane for 24 h, weigh the membrane with a 1/10,000 balance and record the data W1. Calculate the TSP content according to the following formula.TSP content ( ug/m3 )=(W1-W0) ×109/ (Q×t)Eq:Q - sampler average sampling flow rate, L/min;t - sampling time, min.