grab samples

6.5 - Chromium (atomic absorption ) ........................................................................... .. ........................................ ............... 33
6.6 - Copper (atomic absorption) ........................................................................................ ................................................... 34
6.7 - Lead (a tomic absorption) ................................................................................................................................................ 35
6.8 - Nickel (a tomic absorption ) ...................... .. .. ................................................................................................................... 36
6.9 - Vanadium (atomic absorption ) ..................................................................................................................................... 37
6.10 - Zinc (a tomic absorption) """""""""""""""""""""'"'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ................................... 38
6.11 - Extra notes on metal analysis ...................................................................................................................................... 39
6.12 - Mercury (cold vapour atomic absorption techniq ue) ................... ..................................................................... 39
6. 13 - Arsenic .................................................. ................................................................ ......... ....................................................... 43
6.14 - Cyanide ................................. ............................................................................................................................................... 45
6.15 - Fluoride ....................................................... ......................................................................................................................... 48
6.16 - Petroleum-based hydrocarbons ................................................................................................................................... 50
6.17 - Introduction to pesticide and PCB residue analysis ...... ...................................................................................... 52
6.18 - Organophosphate pesticides ......................................................................................................................................... 53
6.19 - Organochlorine residues (pesticides and PCB's) ................................................................................................. 55
6.20 - N-methyl.carbamate pesticide residues .. .................................................................................................................. 61
6.2 1 - 0 rganosi licon com pou nds ............................................ " """""""""".""" ............... , ................................................... 64
6.22 - Total organic-inorganic carbon ................................................................................................................................. 65
Section 7 - Chemical tests which may aid in interpretations under Schedule 111 ...................... ............................... 67
7.1 - Seawa ter reactivity """"."""""""""""""""".""""""."""" .. " ... """""""""".""" ............................................................ 6 7
7.2 - EI u tria te tes t .......................................................................................................................................................................... 6 8
7.3 - Chemical oxygen demand ......................... ........................................................................................ .. ............................ 69
7.4 - Biochemical oxygen demand (BOD) .......................................................................................................................... 71
7.5 - Oxida tion-red uction poten tial ........................................................................................................................................ 7 I
Appendix A - Sources of information and application forms .......................................................................................... 73
Genera I references and source rna teria I ...................................................................................................................................... 7 4
LIST OF FIGURES
Figure I - Typical grab-type samplers ................................................................................................................. ........................ 4
Figure 2 - Gravity core sam pier """'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ................................................. 5
Figure 3 - Triggering mechanism of core sam pler.. ................................................................................................................ 7
Figure 4 - Su bsam piing sediment samples to minimize danger of contamination .................................................. 10
Figure 5 - General laboratory procedure for sediment, grain size distribution analysis ....................................... 18
Figure 6 - Sample splitter ............................................................................................................................................................... 19
Figure 7 - Typical data for grain size analysis ....................................................................................................................... 21
Figure 8 - Coning and quartering coarse fraction ................................................................................................................ 22
Figure 9 - Typical grain size distribution curve .................................................................................................................... 24
Figure 10 - Apparatus to measure mercury in sediment by cold vapour technique ............................................... .41
Figure II - Cyanide distillation apparatus ............................................................................................................................. .47
LIST OF TABLES
Table I - Maximum sieve loads on 8-inch diameter sieves for I phi intervals ......................................................... 20
Table 2 - Procedure for pipette analyses of marine sediments .............................................................. .. ......... ................ 23
Table 3 - Some N -methylcarbamates ................... ..................................................................................................................... 62
VI