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Home > Technical Information > Holding Times > Inorganics Holding Times

 
Inorganics Holding Times

 
Immediate to 48 Hours
Analysis Minimum Volume Container Type Required Preservative Holding Time from Date/Time Sampled
Biological Oxygen Demand (BOD) 500 ML P, G Cool, 4 Deg. C 48 Hours
Color 100 ML P, G Cool, 4 Deg. C 48 Hours
Dissolved Oxygen (DO) 1000 ML G ZHS, Cool, 4 Deg. C Immediate
Surfactants (MBAS) 500 ML P, G Cool, 4 Deg. C 48 Hours
Nitrite Nitrogen 100 ML P, G Cool, 4 Deg. C 48 Hours
Odor 500 ML G Cool, 4 Deg. C 48 Hours
Orthophosphate 100 ML P, G Cool, 4 Deg. C 48 Hours
pH 50 ML P, G Cool, 4 Deg. C Immediate
Total Residual Chlorine 200 ML P, G Cool, 4 Deg. C Immediate
Turbidity 100 ML P, G Cool, 4 Deg. C 48 Hours
Hexavalent Chromium 500 ML P, G Cool, 4 Deg. C 24 Hours
Sulfite 200 ML P, G Cool, 4 Deg. C Immediate
Carbon Dioxide 200 ML P, G Cool, 4 Deg. C Immediate
Settleable Solids (SS) 2 X 1000 ML P, G Cool, 4 Deg. C 48 Hours
Carbonaceous BOD 500 ML P, G Cool, 4 Deg. C 48 Hours
Chlorine Demand 100 ML P, G Cool, 4 Deg. C Immediate
Total Coliform Bacteria 125 ML P, G (Sterile) Na2S2O3/Cool, 4 Deg. C 30 Hours/Potable
Fecal Coliform Bacteria 125 ML P, G (Sterile) Na2S2O3/Cool, 4 Deg. C 6 Hours
Total Plate Count (HPC) 125 ML P, G (Sterile) Cool, 4 Deg. C 8 Hours Recommended/24 Hours Maximum
General Petroleum Degraders 125 ML P, G (Sterile) Cool, 4 Deg. C 24 Hours Recommended


7 DAYS
Analysis Minimum Volume Container Type Required Preservative Holding Time from Date/Time Sampled
Sulfide 2 x 250 ML P, G NaOH to pH>12, ZnAc/Cool, 4 Deg. C 7 Days
Total Dissolved Solids (TDS) 500 ML P, G Cool, 4 Deg. C 7 Days
Total Suspended Solids (TSS) 500 ML P, G Cool, 4 Deg. C 7 Days
Total Solids (TS) 200 ML P, G Cool, 4 Deg. C 7 Days
Particulate Matter 200 ML P Cool, 4 Deg. C 7 Days
Total Mineral Solids 200 ML P, G Cool, 4 Deg. C 7 Days
Total Volatile Solids (TVS) 200 ML P, G Cool, 4 Deg. C 7 Days
Total Volatile Suspended Solids (TVSS) 200 ML P, G Cool, 4 Deg. C 7 Days


Greater than 7 Days
Analysis Minimum Volume Container Type Required Preservative Holding Time from Date/Time Sampled
Chemical Oxygen Demand (COD) 100 ML P, G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Organics Nitrogen 500 ML P, G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Total Nitrogen 500 ML P, G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Acidity 200 ML P, G Cool, 4 Deg. C 14 Days
Alkalinity 200 ML P, G Cool, 4 Deg. C 14 Days
Mercury 500 ML P, G HNO3 to pH<2/Cool, 4 Deg. C 28 Days
Percent Ash 100 ML P, G Cool, 4 Deg. C Not Regulated
Bromide 100 ML P, G Cool, 4 Deg. C 28 Days
BTU 50 ML P, G Cool, 4 Deg. C Not Regulated
Bicarbonate 200 ML P, G Cool, 4 Deg. C 14 Days
Hardness 100 ML P, G HNO3 to pH<2/Cool, 4 Deg. C 6 Months
Chloride 100 ML P, G Cool, 4 Deg. C 28 Days
Total Metals 500 ML P, G HNO3 to pH<2/Cool, 4 Deg. C 6 Months
Fluoride 200 ML P Cool, 4 Deg. C 28 Days
Corrosivity 100 ML P, G Cool, 4 Deg. C Not Regulated
Corrosivity
Langlier Index		 See Notes for Test Volumes See Notes Follow Preservation For Listed Test Calculation: TDS, pH, ALK Hardness, Temp
Oxidation Reduction Potential (ORP) 200 ML P, G Cool, 4 Deg. C Not Regulated
Amenable Cyanide 250 ML P, G NaOH to pH>12/Cool, 4 Deg. C 14 Days
Moisture, Karl Fischer 50 ML P, G Cool, 4 Deg. C Not Regulated
Oil & Grease (413.1) / Freon Based Method 2 X 1000 ML G HCl to pH<2/Cool, 4 Deg. C 28 Days
Tetraethyl Lead 500 ML P ZHS, Cool, 4 Deg. C Not Regulated
Paint Filter Test 200 ML P, G Cool, 4 Deg. C Not Regulated
Petroleum Hydrocarbons by 418.1 (TPH) 2 X 1000 ML G HCl to pH<2/Cool, 4 Deg. C 28 Days (NJ - 7 days water)
Phenols by Chloroform Extraction 500 ML G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Phenols 300 ML G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Dissolved Silica 100 ML P Cool, 4 Deg. C 28 Days
Specific Conductance 200 ML P, G Cool, 4 Deg. C 28 Days
Specific Gravity 100 ML P Cool, 4 Deg. C Not Regulated
Sulfate 200 ML P, G Cool, 4 Deg. C 28 Days
Percent Sulfur 50 ML P Cool, 4 Deg. C Not Regulated
Total Chlorine 50 ML P, G Cool, 4 Deg. C Not Regulated
Total Kjeldahl Nitrogen (TKN) 100 ML P, G H2SO4 to pH&tl;2/Cool, 4 Deg. C 28 Days
Total and/or Dissolved Organics Carbon 40 ML P, G HCl to pH<2/Cool, 4 Deg. C 28 Days
Total Organics Chlorine 100 ML P, G Cool, 4 Deg. C Not Regulated
Total Organics Halides (TOX) 300 ML G ZHS/H2SO4 TO pH<2/Cool, 4 Deg. C 28 Days
Total Phosphates 200 ML P, G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Reactive Sulfide 100 ML P, G Cool, 4 Deg. C Not Regulated
Reactive Cyanide 100 ML P, G Cool, 4 Deg, C Not Regulated
Nitrate Nitrogen 50 ML 50 ML H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Ignitability 100 ML P, G Cool, 4 Deg. C Not Regulated
Nitrate + Nitrite Nitrogen 100 ML P, G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Ammonia Nitrogen 200 ML P, G H2SO4 to pH<2/Cool, 4 Deg. C 28 Days
Cyanide 250 ML P, G NaOH to pH>12/Ascorbic Acid
Cool, 4 Deg. C		 14 Days
Oil & Grease (1661A) / Hexane Based Method 3 X 1000 ML G HCl to pH<2/Cool, 4 Deg. C 28 Days


Solids and soils may be analyzed for the above analytes with a general requirement of approximately 100 grams (1-60 mL) per analyte, or in combinations of analytes in 1-300 mL bottle.

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