| NONE |
No preservation |
| P01 |
4 drops of 10% sodium thiosulfate to 4 oz. |
| P02 |
Adjust to pH 4-5 |
| P03 |
Add 3 mL 10% sodium thiosulfate per 1 gal. |
| P04 |
Adjust to pH < 2 with sulfuric acid |
| P05 |
Adjust to pH < 2 with hydrochloric acid |
| P06 |
Adjust to pH < 2 with sodium hydrogen sulfate |
| P07 |
Adjust to pH > 12 with sodium hydroxide |
| P08 |
Adjust to pH < 2 with nitric acid |
| P09 |
0.6 g of ascorbic acid to 500 mLs |
| P10 |
Add 2 mL of zinc acetate to 500 mLs |
| P11 |
Adjust to pH > 9 with sodium hydroxide |
| P12 |
4 degrees Celsius |
| P13 |
Methanol preservation |
| P14 |
Not noted on Chain-of-Custody |
| P15 |
Cooler temperature > 6 degrees C |
| P16 |
Cooler temperature < 2 degrees C or freezing |
| P17 |
Add 5mL 20% sodium bisulfate |
| P18 |
Sodium bisulfate preservation |
| P19 |
Zinc acetate and NaOH to pH>9; store cool at 4C |
| P20 |
Store in Darkness; store cool at 4 degrees C |
| P21 |
Adjust to pH <2 with phosphoric acid |
| P22 |
Dechlorinate, store cool at 4 deg. C |
| P23 |
Field filter, HNO3 to pH<2 |
| P24 |
Cool 4 deg. C, HNO3 to pH<2 after extraction |
| P25 |
Dechlorinate, pH>9 with NaOH, cool 4 deg C |
| P26 |
pH<2 H2SO4, Cool 4 degrees Celsius |
| P27 |
3.6 mL monochloroacetic acid buffer/125 mL, store cool at 4 deg C |
| P28 |
Ethylenediamine |
| P29 |
4 degrees C; NH4Cl; store in darkness |
| P30 |
Filtration; pH 9 - 9.5, cool 4 deg C |
| P31 |
0.2% HCl (or 0.4% GN HCl) |
| P32 |
Dechlorinate, pH < 2 with HCl, 4 degrees Celsius |
| P33 |
pH < 2 with HNO3, Store ambient |
| P34 |
Adjust to pH > 11 with trisodium phosphate dodecahydrate |
| P35 |
Sodium Sulfate |
| P36 |
Sodium Sulfite |
| P37 |
Ammonium Chloride |
| P38 |
Monochloroacetic acid (MCAA) buffer and sodium thiosulfate |
| P39 |
Sodium thiosulfate and sulfuric acid |
| P40 |
Ammonium Sulfate/Ammonium Hydroxide |
| P41 |
Sodium Carbonate/Sodium Bicarbonate/Ammonium Sulfate |
| P42 |
Trizma |
| P43 |
L-ascorbic acid + EDTA + Potassium diHydrogen Citrate + Refrigeration |
| P44 |
Ammonium Acetate, 4 degrees Celsius |