SKC 690-105 ULTRA III Passive Samplers with Charcoal Sorbent Analysis Instructions User Manual

Analysis instructions, Calculations

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background image

Sample sorbent compartment

(plug removed)

Plug

Sliding cover

Clip

Blank/correction sorbent

compartment (plug in place)

(690-105-NB)

ULTRA III Passive Samplers with or without Blank,

Containing Charcoal Sorbent (Solvent Extraction)

Cat. No. 690-105, 690-105-NB, or 690-205

Analysis

1. a.

For Cat. No. 690-105 or 690-105-NB (prefilled sampler):
Remove the sampler from the resealable pouch and proceed
to Step 2.

b.

For Cat. No. 690-205 (sorbent in vial): Remove the lid from the
vial and proceed to Step 4.

2. Lay the sampler on a fl at surface with the back of the sampler

facing upward.

3. With the clip oriented to the left , remove the plug from the

compartment containing the sample sorbent (on left side,
immediately above the diff usion holes).

4. Hold the sampler or vial over a 3.7-ml glass vial. Use a larger

vial if using more than 2 ml of solvent.

5. Transfer the sorbent to a 3.7-ml or larger vial by tipping the

sampler or vial upside down over the vial. Gently tap to remove
any remaining sorbent.

6. Add typically 2 ml of desorption solvent to the sorbent in

the vial.

Add the solvent slowly.

7. Shake the sorbent for 30 minutes.

8. Analyze the sample by gas chromatography with the detector

specifi ed in the method for the compound of interest.

9. Analyze the blank/correction sorbent, as needed, by repeating

Steps 2 through 8 for the sampler and Steps 1 and 4 through 8
for the sorbent vial.

Form 40127 Rev 1306

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 complete SKC Limited Warranty and Return Policy, go to htt p://www.skcinc.com/warranty.asp.

Analysis Instructions

863 Valley View Road, Eighty Four, PA 15330 USA

Tel: 724-941-9701 Fax: 724-941-1369 e-mail: [email protected]

Calculations

[(SW) - (BW)] (24.45 x 10

6

)

C =

(DE) (MW) (SR) (MIN) (PT)

Where:
C

= Concentration of chemical (ppb)

SW = Sample weight by analysis (μg)
BW = Analyte weight in blank (μg)
PT = Pressure/temperature correction (see below)
DE = Desorption effi

ciency (see below)

MW = Molecular weight of chemical
SR = Sampling rate (ml/min)
MIN = Sampling time (minutes)

The equation above is correct for 25 C (298 K) and standard
atmospheric pressure (760 mm Hg). To convert to other temperatures
and pressures the correction factor is:

PT = (T

1

/T

2

)

1.5

(P

2

/P

1

)

Where:
T

1

= Sampling site temperature (in Kelvin)

T

2

= 298 K

P

1

= Sampling site pressure (in mm Hg)

P

2

= 760 mm Hg

Desorption effi

ciency should be determined and expressed as a

decimal (e.g., 98% = 0.98).

For sampling rates and desorption solvents, go to www.skcinc.
com/PassiveGuide/default.asp.

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