Cập nhật lần cuối: Thứ ba, 30 Tháng 1 2018 01:59 | Viết bởi Phan Thanh Thuan
Lab of Environmental Chemistry is a majoring one to support analyzing and assessing targets chemical pollution in water, soil, air,…supporting observation and evaluation of environmental quality( soil, water, air).
Funded by many programs of international cooperation, Lab’s equipment completely meets requisitions of analyzing water, air majoring in environment according to TCVN- A handbook of analysis of Soil-Water-Fertilizer-Crops, the Standard method of AWWA, Standard method of Standard Methods for Examination of Water and Waste Water and some standards, standard methods of Europe with high accuracy.
Lab has been used and controlled by lecturers with much experience for many years.
Dr. Pham Van Toan, email: email@example.com
Recently, the lab, is set up much modern equipment, can analyze targets of environmental physics and chemistry. Some targets are analyzed and determined at the lab and there is representative equipment as follow.
A. SOME EQUIPMENT FOR ANALYZING PHYSICCAL AND CHEMICAL PARAMETERS OF THE ENVIRONMENT
+Voltage: -1600 to +1600 mV, accuracy ± 0.2 mV or ±0.05%
ii. pH Meter ORION – England- Model 420 A
Technical features: measure pH, measure DO, temperature and redox-potenmetry (mV)
+ pH: -2 to 19.999, accuracy ± 0.005
+ Voltage: -1600 to +1600 mV, accuracy ± 0.2 mV or ±0.05%
+Temperature: -5 to 1050C, accuracy ±1.0
iii. Hand-held pH Meter WTW- Germany- Model 330
Technical features: measure automatic pH, temperature, voltage(mV). Besides, the machine is able to measure redox voltage when using electrode Redox, manual data storage mode(store) and automatic(Auto store)
+ pH; -2 to 16, accuracy ±0.01
+ mV: -1250 to +1250, accuracy ±1.0
+Temperature: -5 to 99.90C, accuracy ± 0.1
- Methods: measure directly with quick meters and chemicals(improvement method Winkler)
- Equipment: Hand-held DO meter WTW- Germany- Model Oxi 330
The machine can work every posture.
+ DO: 0 to 50 mg/L, accuracy ±0.5%
+ Temperature: o to 500C, accuracy ± 0.1
+ Maximum pressure: 6 bar
3. Electric Conductivity
- Method: measured directly with quick meters
i. Hand-held conductible meter ORION- England – Model 105
Technical features: measure electric conductivity (µS, mS), salt(0/00)and temperature. The machine can also check itself.
+ Electric conductivity: 0 to 199.9 mS, accuracy ± 0.5% max
+Salt: 0 to 80 ppt(0/00), accuracy ± 0.5% max
+Temperature: -5 to 1050C, accuracy ± 1.0
ii. Electric conductivity meter JENWAY- England-Model 4320
Technical features: measure electric conductivity (µS, mS), dissolve solid total (mg/L)
Besides, the machine is able to store data (100 data) with time, choose conversational language, print data into screens or printers
+ Electric conductivity: 0 to 19.99 S, accuracy ± 0.5%
+ Dissolvable solid total: 0 to 2000 mg/L, accuracy: ±0.5%
Equipment and Tools: hand-held light meter Lutron, Mod LX-107, Taiwan
Technical features: The machine can measure 4 types of light: sunlight, light of Fluorescent, light of sodium, and light of mercury.
Scales: from 2000 to 100000 LUX
Methods: measure directly with hand-held noise meters
Equipment and Tools: hand-held noise meters, Digital Sound Meter (DSM 100)
. Scales : 35 - 130 dB, show to 0.1 dB, accuracy ± 2.0 dB
. Low scales: 35 - 100 dB
. high scales 65 - 130 dB
. Good temperature: : 0 - 400C
Methods: Determinate dust content on the air with membrane filter method using different dust concentration meters.
Equipment and Tools:
a. Dust concentration meters Sibata PS-43 ( the machine has small guns collect gas samples, flowmeters, impacter, filter papers and silicon oil, dust meters Sibata LD-1, dust concentration meter High Volume Air Sampler HVS-500-5S( the machine has guns collect air samplers, charts to determine concentration and filter papers
Technical features of dust concentration meters Sibata PS-43 -Japan:
. Concentration of collecting gas: from 0.5 to 2.0 liters/min