Marine Chemistry Laboratory
University of Washington School of Oceanography
The Marine Chemistry Laboratory at the School of Oceanography provides marine and freshwater analytical services to the University and oceanographic communities. We are an accredited laboratory with the State of Washington. The lab specializes in the analyses of nutrients, total N and total P, salinity, chlorophyll, oxygen, DOC in aqueous samples, and OC in particulate samples.
We highly reccomend that you download and read the sampling procedures document by clicking on the big yellow CTD!!
Rates and other analyses are listed below:
| ANALYSIS | HOMEBASE OPERATIONS | |
|---|---|---|
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Analyses are run on a Guildline Autosal 8400B - Calibration is with IAPSO Standard Seawater |
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Oxygen |
Analyses are run using the Carpenter (modified Winkler) with a Metrohm 765 Dosimat buret |
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Nutrients (phosphate, silicate, nitrate, nitrite, & ammonia) |
Analyses and calibration follow the protocols of the WOCE Hydrographic Program using a Seal Analytical AA3 |
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Chlorophyll a and phaeopigments |
Analysis is acetone extraction and fluorometric detection on a Turner Designs TD-700 fluorometer |
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Dissolved Organic Carbon (aqueous samples) |
Analysis is with a Shimadzu TOC-Vcsh DOC analyzer |
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Total Organic Carbon, Nitrogen, and Hydrogen (solid samples) |
Analysis is by Exeter Analytical CE-440 CHN analyzer |
Oceanography chemical analyses price list:
Labor rate: $88/hr.
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Nutrients: (PO4, Si(OH)4, NO3, NO2, NH4) all ions included in base price |
$21.00 each $30.00 each if dilution required Syringe filters for samples: Market Cost |
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Total N&P |
$21.00 ea.
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Chlorophyll a |
$21.00 each |
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Dissolved Organic Carbon (DOC) |
Filtered liquid sample $27.00 each C clean filters Market Cost C clean sample vial Market Cost |
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Particulate Carbon and Nitrogen (CHN) |
On 25 mm filters $49.00 each Sediment samples: $57.00 each Prepped samples: $13.20 ea. C clean filters: Market Cost |
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Salinity |
$22.00 each |
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TSS |
$19.00 each |
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Oxygen titrations |
$23.00 each 1L suite of the six oxygen reagents: $506.00 (Will be Market Cost) |
Important notes:
- Add 15.6% to the total cost for any work not charged to a UW budget.
- Supplies are not always available on short notice, so plan ahead and give at least one full week's notice when requesting supplies or reagents.
- PAPER log sheets must be provided with the samples. Logsheets should include contact info for who gets the data, ALL contact info for who gets the invoice, budget numbers (for UW projects), sample identification numbers, sampling locations, filtration volumes (where appropriate), and whether the sample contains fresh or marine water.
- Business is very good in the lab, so short turnaround time for sample analyses MUST be discussed ahead of time.
- Clients will be charged for any shipping costs associated with supplies and coolers
- We will not accept or process any samples fixed with HgCl, Azide, or radioisotopes of any kind!
- C14 labelled samples are not allowed in the building, no exceptions.
Accreditation Codes and Detection Limits
| Analysis | Method References | EPA/SM# | NELAC Code | MDLs |
|---|---|---|---|---|
| PO4 | UNESCO(1994) | EPA 365.5_1.4_1997 | WM920270 | 0.03uM, 0.0009mg/L |
| SiOH4 | UNESCO(1994) | EPA 366 | WM920240 | 0.45uM, 0.013mg/L |
| NO3 | UNESCO(1994) | EPA 353.4_2_199 | 10068209 | 0.18uM, 0.0025mg/L |
| NO2 | UNESCO(1994) | EPA 353.4_2_1997 | 10068209 | 0.01uM, 0.0001mg/L |
| NH4 | UNESCO(1994) | EPA 349 | WM920220 | 0.09uM, 0.0013mg/L |
| Total N | Valderrama(1981) | SM 4500-P J | WM920270 | 0.68uM, 0.0095mg/L |
| Total P | Valderrama(1981) | SM 4500-P J | WM920270 | 0.014uM, 0.0004mg/L |
| Salinity | UNESCO(1994) | SM 2520 B-93 | 20040055 | 0.002PSU |
| Ckhlorophyll_a | UNESCO(1994) | EPA 445 | WM100080 | 0.02ug/L |
| DOC | UNESCO(1994) | SM 5310 B-00 | 20137819 | 100ug/L |
| POC | UNESCO(1994) | EPA 440.0 | 10081206 | 10ug |
| PN | UNESCO(1994) | EPA 440.0 | 10081206 | 1ug |
| Dissolved O2 | UNESCO(1994) | EPA 360.2 | 50001600 | 0.5uM kg-1 |
UNESCO (1994). Protocols for the joint global ocean flux study (JGOFS) core measurements. Vol. 29.
Valderrama (1981). The simultaneous analysis of total nitrogen and total phosphorus on natural waters. Mar.Chem (10), 109-122.
Please contact Loren Tuttle (lbtuttle [at] uw [dot] edu) PRIOR to sampling to discuss your project/sampling/shipping plans, and turnaround time. This is especially important now as we no longer have an FTE employee in the lab!!
Shipping Address:
Loren Tuttle
UW-Oceanography
1492 NE Boat St.
Ocean Sci Bldg Rm 346
Seattle, WA 98105
Phone: 206-543-9235
Financial Particulars:
IRS/TaxID/Entity Number: 91-6001537
Cage Code: 0MCA1 (first character is a zero)
DUNS Number: 605799469
Make payments to: University of Washington
Updated 30Oct2023
