Ordering information, Skc limited warranty and return policy – SKC 520-02A Inorganic Mercury Passive Sampler User Manual
Page 4
Calibration
The complete analytical system can be calibrated by injecting aliquots from standard
solutions (either from liquid or sorbent solution standards or both). It is recom-
mended that three diff erent concentrations be checked to insure linearity of the
equipment over the likely range.
It is further recommended that standards and blank values be interspersed between
samples to check for any variations in response. Take particular care to avoid buildup
of mercury on the internal surfaces of the equipment; this will cause an increase
in readings. A buildup of mercury can be detected by a gradual apparent increase
in the blank values during use. If this occurs, run several aliquots of mercury-free
solutions through the equipment until the analyzer indication drops to zero. Retest
the “blank” solution as an additional precaution before proceeding.
Report all results as nanograms or micrograms of mercury on the capsule by direct
comparison with the known standards. Relate the aliquot size to the total 25 ml of
liquid solution.
Consult OSHA Method ID 140 and MDHS 16 for detailed analytical procedures.
Interpretation of Results
The lab result will indicate the total mass of mercury which was collected on the
sorbent capsule in either nanograms (10
-9
gram) or micrograms (10
-6
gram). The
airborne concentration of mercury is determined as follows:
1. Convert reported mass of mercury into micrograms (10
-6
gram).
2. Convert sampling period into minutes.
3. Sample Volume (L) =
Sampling Period x Sampling Rate x Temperature/Pressure
(mins) (L/min) Correction Factor
Where:
Sampling rate = 0.020 L/min at 20 C and 760 torr
Temperature/Pressure Correction Factor = (T
1
/T
2
)
1.5
x (P
2
/P
1
)
T
1
= Sampling Site Temperature (K)
T
2
= 293 K
P
1
= Sampling Site Pressure (torr)
P
2
= 760 torr
4. Mercury
mg/m
3
= Mercury Mass (μg) - Mercury Blank (μg)
Sample Volume (L)
Note: This is the calculation of mercury concentration as given in OSHA Method ID-140
(Revised June 1991), page 16.
Ordering Information
Replacement Sorbent Capsules contain Anasorb C300* and
include replacement foams and resealable bags .................................. Cat. No. 520-02A/10
Cat. No. 520-02C/30
Reusable Capsule Holder ..........................................................................Cat. No. 520-03
* Anasorb C300 is equivalent to Hydrar and Carulite
Form 3758 Rev 1302
SKC Limited Warranty and Return Policy
SKC products are subject to the SKC Limited Warranty and Return Policy, which
provides SKC’s sole liability and the buyer’s exclusive remedy. To view the com-