Notes from original xls file: Sinking_particles.xls
Total mass flux measurement
Nuclepore filter weight with sample was measured for 4 cups from
one depth of the drifting sediment trap.

CN analysis
No. 6 GF/F filter was used for CN analysis. of (DMO Note: ????)
The filters were freeze-dried and then inorganic carbon was removed by an acid treatment in (DMO Note: ????)
The filters were freeze-dried and then fumed in desiccator with conc. HCl for 4-5 hours to remove inorganic carbon.
Organic carbon and nitrogen were analyzed by EA1110 elemental analyzer (Carlo Erba) calibrated with acetoanilide (C8H9NO) standard reagent.
C and N fluxes were calculated from mg yield of C and N with collection area of the trap and drifting period.

ICPAES analysis of trapped material of drifting sediment trap acid digestion by HNO3/HClO4/HF ppm (mg/kg in dry wt.
Nuclepore filter with sample was enclosed in a double sealed Teflon digestion vessel with stainless steel outer jacket with 2 ml HNO3 and 1ml HClO4.
The digestion vessel was heated at 150 degree C for 7 hours to decompose organic material.
One ml of HF was added into the Teflon vessel and silicate was decomposed on a hot plate.
The final weight of sample solution was adjusted to 4 g and served to ICP atomic emission spectrometric analysis.
Blank was corrected from with the results of the same procedure only using blank Nuclepore filter and acid reagents.
Nippon Jarrel Ash type ICAP750 was used for the ICPAES analysis.

Biogenic Si was measured using different Nuclepore filter with that for metallic element analysis.
Nuclepore filter with trapped material was treated with 0.5 M Na2CO3 solution for 3 hours at 85 degree C.
The extracted biogenic Si was measured by ICPAES same as metallic elements.
Samples for 200 m depth (from Aono type trap had different history from other depths.
Samples other than 200 m preserved under neutralized pH formalin solution and applied swimmer picking out procedure were filtered within two months after recovery.
Because 200 m trap has two sample cups samples were divided after five months of recovery and served for ICP analysis for Si and other elements.
C/N analysis fo samples for 200 m depth was done in similar period with other depths.
The total mass of 200 m analysis suming up for C N Si and elements are significantly smaller than 100 %.
These results are not accurate than other depths.
Filter weight is that of the digested filter different from the average of four Nuclepore filter.

Al Ca Fe Mg Mn P Sr Ti Zn This element group was well within ICPAES measurement range with minimum blank correction.
The element group (Ba Cr Cu and Na K Shas analytical problem relating to blank correction and digestion efficiency
B comes from preservative.
Na K and S are nominated to check analytical accuracy to sum up the total mass which usually comes from seawater components.

Elemental flux was calculated from concentration of the element multiplied by the total mass flux estimated from the trapped material weight on the four Nuclepore filter.
Calculated sum of all the elements well agree with 100 %.
Silicate Ca was estimated using crustal abundance of Ca to Al and the rest of Ca was estimated as carbonate.
Inorganic carbon was estimated from the carbonate calcium.
The total sum of elements other than 200 m samples are excellent.
Preservation for 200 m samples might not be good.
(dm) mass check calculations assume element in stated form.
(dm) calculatedMass = flux / atomic mass element * molecular mass stated form

Isotope analysis of organic carbon of trapped material
No. 7 GF/F filter for each trap was served for carbon isotopic analysis by
Carlo Erba elemental analyzer (EA1110) combined with a mass spectrometer (Delta Plus Finniga MAT).
The filter was fumed by HCl.
Filter used indicates the division of sample served for combustion furnace of the elemental analyzer.
MCC is Mass Check Calculation (added to params toward end of records

BCO-DMO Processing Notes
CSV file generated by Doug Mackie from original spreadsheet Sinking_particles.xls

BCO-DMO Edits
- Parameter names modified to conform to BCO-DMO convention
- lat/lon for deployment and recovery added from buoy drift data

sinkpart.csv