Continuous Dichotomous
Aerosol Chemical Speciation Analyzer
Japanese Patent Application No.2008-237220

ACSA-14

It is the evolutionary continuous dichotomous
analyzer that can measure the chemical species
in the atmospheric aerosol (PM2.5 and PM10-2.5)
while measuring the mass concentration every
one hour, automatically.

ACSA enables to minimize artifact during
sampling and matrix effects (interference)
during analyzing by the short period (every 1hour) sampling with using a PTFE tape filter
and a virtual impactor. It is non-conventional
approach to measure "the acidity of atmospheric aerosol", which has been difficult tomeasure precisely using 24-hour sampling
method because of gas adsorption or particulate
volatility.
To measure mass concentrations simultaneously
enables to compare with environmental standards and to estimate the contribution ofchemical species or amount of water in PM2.5.
The highest sensitivity can be obtained byconcentrating the aerosol in 1 m3 air to
1 mL solution with PTFE tape filter and automatic extraction system, in comparison withthe aerosol-mass-spectrometer (AMS) and thecontinuous sulfate/ nitrate analyzer.

Observation data by ACSA (February, 2014, Osaka Japan)

Hum %RH

Temp
Wind Direction
RainWind Speed

W.Speed m/s
Rain mm/h

Wind Direction

Temp °C

Hum

Wind Direction

Hum %RH

HumTempWind Speed

Rain

W.Speed m/s
Rain mm/h

Wind Direction

Temp °C

Observation data by ACSA (June - July, 2014, Osaka Japan)

SysytemSpecifications
Measuring objects

PM2.5 and PM10-2.5

Measuring items

for PM2.5[WET], PM2.5[DRY], PM10-2.5[WET], PM10[WET]
Mass concentration
for PM2.5[WET], PM10-2.5[WET]
Acidity (hydrogen ion concentration)
Sulfate ion concentration
Nitrate ion concentration
WSOC (Water Soluble Organic Compaunds)

Water Extract

Reference
Solution

VirtualImpactor

Washing
Solutionfor PM2.5[WET]
OBC (Optically measured Black Carbon)
Measuring principle
PM concentration
AciditySulfate ion
Nitrate ion
WSOC
OBC

Beta-ray attenuation method
Absorptiometry by pH indicator
Turbidimetry
UV spectrophotometric method
UV spectrophotometric method
NIR light scattering method

Measurement Range *PM concentration
AciditySulfate ion
Nitrate ion
WSOCOBC* at one hour sampling (depending on sampling period)0 - 1 mg/m3[H+] 10 - 1000 nmol/m3
0 - 300 nmol/m3
0 - 200 nmol/m3
0 - 5 μg-C/m3 (as maleic acid)
0 - 5 μg-C/m3Sample flow rate

16.7 L/min (15.4 L/min + 1.3 L/min)

Flow control

Volumetric flow

Filter media

PTFE tape roll

Measuring period

Configurable per one hour

Beta sources

14C, less than 10 MBq

PM size classifier

USEPA PM10 inlet and PM2.5 virtual impactor

LCD display

Measured data, Control information, Message, Alerts

Internal data storage

Measured data, Control information, Message, Alerts

Digital input/ outputEthernet, USB1.1, RS232CPower supply

AC100V 50/60Hz approx. 400VA

Withstand voltage test

AC1000V 50/60Hz for one minuteInsulation resistanceMore than 5 megohm

Weather data

Temperature, Relative humidity, Pressure
Optional: Wind direction, Wind speed, Rain amount,Solar radiation

ReagentforSulfateExtractor

Fine Particle
PTFE Filter

Coarse Particle
OBC Sensor

ReagentforTurbidimetry

LinearMotor

Beta Gauges
Optical fiberLight Scattering
Detector

Measuring Cell(1mL)

Light source

Stirrer

pH Indicator

DrainageSpectrophotometer

MotorDimensions
Unit: mm650840*For further information, please contact us. ACSA-14 is available for rent.

1280

ACSA-14

Outdoor Shelter Type（weight: approx. 90 kg）

KIMOTO ELECTRIC Co., Ltd.
3-1 Funahashi-cho, Tennoji-ku, Osaka 543-0024, JAPAN
Phone: +81-6-6768-3401 Fax: +81-6-6764-7040
Web site: http://www.kimoto-electric.co.jp/
E-mail: sales@kimoto-electric.co.jp
Note) Specifications are subject to change without the notice for the improvement.

Printed in September 2014 ACSA14.02E