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Lab of Physico-Chemical Parameters & Reference Materials

There are 12 staffs working at laboratory, including doctor (Dr.), master (M.Sc), engineers and technicians
- Head of Lab: MSc. Ngo Huy Thanh (email : thanhnh@vmi.gov.vn)
- Lab. address: Room 203 - building D, No 8 Hoang Quoc Viet, Cau Giay dist., Ha Noi
- Tel: (+844) 3836 1133 | Fax: (+844) 3756 4260
- Email of lab.: hlmc@vmi.gov.vn

Verification, Calibration capabilities of measuring equipment

Name of measuring standards Range of measurement Accuracy
Moisture meters for seeds (paddy rice, rice, maize and coffee). (6 ÷ 30) % 0,15 %
Hydrometer (600 ÷ 2.000) kg/m3 0,5 kg/m3
Refractometers for measurement of sugar content Brix: (0,0 ÷ 93,0) %
Refractive index: nD (1,3306 ÷ 1,5284)
0,1 %
Polarimetric saccharimeters (-259 ÷ 259) °Z 1; 2
Equipment for measurement of total mass concentration of suspended particles in air (0 ÷ 2.500) kg/m3 5 %
Breath alcohol tester CO: (0 ÷ 5) % V;
CO2: (0 ÷ 16) % V;
HC (n-hexan): (0 ÷ 0,2) % V;
O2: (0 ¸ 21) % V.
5 %
Gases meter of vehicle exhaust emissions SO2: (0 ÷ 5.000) ppm;
CO2: (0 ÷ 16) %;
CO: (0 ÷ 7) %;
NOx: (0 ÷ 5.000) ppm.
5 %
Gas analyzers of SO2, CO2, CO, NOx in air CO: (0 ÷ 5) % V;
CO2: (0 ÷ 16) % V;
HC (n-hexan): (0 ÷ 0,2) % V;
O2: (0 ÷ 21) % V.
5 %
pH meter, electrolytic conductivity meter, turbidity meter, dissolved oxygen meter, total dissolved solids meter pH: (0 ÷ 14) pH 0,01 pH
DO: (0 ÷ 20) mg/L or (0 ÷ 200) %  saturated oxygen 6 %
EC: (0 ÷ 500) mS/cm 5 %
TUR: (0 ÷ 4.000) NTU 5 %
TDS: (0 ÷ 200.000) mg/L 5 %

Calibration capabilities of measuring standards

No Calibrated standard/ equipment Range of measurement Accuracy/ Uncertainty
1 Moisture meters for seeds (paddy rice, rice, maize and coffee). (0 ÷ 47) %M.C 0,1 %
2 pH meter (0 ÷ 14) pH 0,01 pH
3 Hygrometer (600 ÷ 2.000) kg/m3 0,1 kg/m3
4 Humidity - Temperature meter;
Thermo – Hygro meter
(0 ÷ 100) %RH
(0 ÷ 50) °C
1 %RH
0,1 °C
5 Gas analyzer (CxHy, CO, H2S, SO2, NOx, CO2). (0 ÷ 100) % 2 % relative
6 Spectrophotometer (UV-Vis) (190 ÷ 920) nm
(0 ÷ 2) Abs
(0 ÷ 100) %T
0.2 nm
0.009 Abs
0.2 %T
7 Total dissolved solids meter (0 ÷ 200) g/L 0,1 %
8 Electrolytic conductivity meter (0 ÷ 500) mS/cm 0,5 %
9 Breath alcohol tester (0,000 ÷ 0,400) %BAC 0,002 %BAC
10 Kinematic viscometer (2,5 ÷ 10.000) cSt 0,2 %
11 Dynamic viscometer (2,5 ÷ 10.000) P 0,2 %
12 BOD incubator (0 ÷ 50) °C 0,6 °C
13 Glass alcoholmeter (0 ÷ 100) %V 0,1 %V
14 Chemical oxygen demand meter (0 ÷ 15.000) mg/L 0,1 %
15 Atomic absorption spectrometer Heavy metal analysis 0,6 %
16 Polarography analyzer Voltage : ΔV ≤ 5 mV
Repeatability: ≤ 3 %
Stability: ≤ 1.5 %
0,6 %
17 XRay Fluorescence Analyzer (0 ÷ 99,99) % Au 0,15 %

Testing capabilities

No Name of testing capabilities Specification Testing
1 Standard gas of SO2, CO2, CO, NOx. - SO2: (0 ÷ 5.000) ppm
- CO2: (0 ÷ 16) %
- CO: (0 ÷ 7) %
- NOx: (0 ÷ 5.000) ppm
ĐLVN 282 : 2015
2 Alcohol standard gas. (0 ÷  3,0) mg/L ĐLVN 290 : 2015
3 Standard gases of vehicle exhaust emissions - CO: (0 ÷ 5) %
- CO2: (0 ÷ 16) %
- HC: (0 ÷ 0,2) %
- O2: (0 ÷ 21) %
ĐLVN 292 : 2015
4 Gold standard sample. (30 ÷ 99,99) % QTTN
5 To define the moisture of solid sample. (5 ÷ 47) % QTNB
6 Standard solutions reproducing the conductivity of electrolytes (0 ÷ 500) mS/cm ĐLVN 277 : 2015
7 Turbidity standard solution (0 ÷ 4.000) NTU ĐLVN 278 : 2015
8 Dissolved oxygen standard solution (0 ÷ 50) mg/L ĐLVN 279 : 2015
9 pH standard solution (0 ÷ 14) pH ĐLVN 280 : 2015
10 Standard solution of total dissolved solids (0 ÷ 200.000) mg/L ĐLVN 281 : 2015
11 Ethanol standard solution (0 ÷  5,0) g/kg ĐLVN 291 : 2015
12 Standard solution of kinematic viscosity (1 ÷ 9.000) cSt V06.M - 18.06
13 Standard solution of dynamic viscosity (1 ÷ 9.000) P V06.M - 19.06
14 Density standard solution. (600 ÷ 2.000) kg/m3 QTNB
15 Breath alcohol tester – QTTN. (0 ÷ 3,0) mg/L ĐLVN 240 : 2010
16 Gases meter of vehicle exhaust emissions – QTTN - CO: (0 ÷ 5) %
- CO2: (0 ÷ 16) %
- HC: (0 ÷ 0,2) %
- O2: (0 ÷ 21) %
ĐLVN 241 : 2010
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