28 | AcmeLabs Schedule of Services & F ees 2013 Rock & Drill Core Soil, T ill & Sediment Gr oup 1SL Sequential Leaches Selective or sequential extractions can tar - get elements held by a specifc soil phase or range of phases thus allowing better interpretation of geochemical processes. Used sequentially , the leaches can deter - mine elements occurring in surface soils as salts or adsorbed ions on clays, organic compounds and amorphous Mn and Fe hydroxides. Used singularly , the stronger leaches are less selective. Contact our geochemist for further information. Sample minimum 2.5g pulp per leach. Gr oup 1 sl W A demineralized water leach for extracting the water -soluble component. Gr oup 1 sle 1 M ammonium acetate leach for exchangeable cations adsorbed by clay and elements co-precipitated with carbonates. Gr oup 1 slo 0.1 M sodium pyrophosphate leach for elements adsorbed by organic matter (humic and fulvic compounds). Gr oup 1 sl M 0.1 M hydroxylamine leach for elements adsorbed by amorphous Mn hydroxide, often the most reactive soil phase for scavenging mobile elements. Gr oup 1 slf 0.25 M hydroxylamine leach for elements adsorbed by amorphous Fe hydroxide and more crystalline Mn hydroxide. G r o u p 1 S L C d n Separate, per leach $ 2 7. 0 5 Sequential, per leach $ 3 4. 40 Set up charge, frst leach $ 3 6 7. 5 0 Set up charge, additional $ 24 1 . 50 Note: All detection limits in ppb Gr oup 1SL W Gr oup 1SLE Gr oup 1SLO Gr oup 1SLM Gr oup 1SLF l a 2 5 5 5 5 l i 0.1 20 20 20 20 l u 0.05 5 5 5 5 Mo 1 10 10 10 10 n b 0.5 10 10 10 10 n d 1 5 5 5 5 n i 5 50 50 50 50 Pb 3 20 20 20 20 Pr 0.5 5 5 5 5 r b 2 5 5 5 5 r e 0.05 2 2 2 2 s 10000 – – – – s b 1 5 5 5 5 s c 20 100 100 100 100 s e 5 200 200 200 200 s m 0.5 5 5 5 5 s n 1 20 20 20 20 s r 10 20 20 20 20 t a 0.5 20 20 20 20 t b 0.05 5 5 5 5 t e 1 20 20 20 20 t h 2 20 20 20 20 t l 0.2 5 5 5 5 t m 0.05 5 5 5 5 U 0.1 5 5 5 5 V 50 50 50 50 50 W 2 10 10 10 10 Y 1 5 5 5 5 Yb 0.5 5 5 5 5 Zn 10 100 100 100 100 Zr 1 20 20 20 20 Gr oup 1SL W Gr oup 1SLE Gr oup 1SLO Gr oup 1SLM Gr oup 1SLF a l 1000 1000 1000 1000 1000 Ca 5000 5000 5000 5000 5000 f e 100 5000 5000 5000 5000 K 2000 5000 5000 5000 5000 Mn 50 50 50 50 50 Mg 100 1000 1000 1000 1000 n a 3000 – – – – P 100 5000 – 5000 5000 t i 50 1000 1000 1000 1000 a u 1 1 1 1 1 a g 0.5 3 3 3 3 a s 5 100 100 100 100 Ba 10 50 50 50 50 Be 1 20 20 20 20 Bi 0.5 5 5 5 5 Br 10 – – – – Cd 0.5 20 20 20 20 Ce 1 5 5 5 5 Cl 2000 – – – – Co 1 20 20 20 20 Cs 0.5 5 5 5 5 Cu 5 20 20 20 20 Dy 0.1 5 5 5 5 e r 0.1 5 5 5 5 e u 0.1 5 5 5 5 Ga 0.5 20 50 20 20 Gd 0.1 5 5 5 5 Ge 0.1 50 50 50 50 Hf 0.1 20 20 20 20 Hg 1 5 5 5 5 Ho 0.05 20 20 20 20 i n 0.05 10 10 10 10 Geochemical Sequential Leaches