Preservation and Sample Size

TEST	VOLUME	CONTAINER	PRESERVATION	HOLD TIME
Alkalinity	100 mL	P ,G	Cool, 4C	14 days
Biochemical Oxygen Demand	1000 mL	P, G	Cool, 4C	48 hours
Bicarbonate	100 mL	P, G	Cool, 4C	14 days
Carbonate	100 mL	P, G	Cool, 4C	14 days
Chemical Oxygen Demand	50 mL	P, G	Cool, 4C, H2SO4 to pH < 2	28 days
Chloride	100 mL	P, G	Cool, 4C	28 days
Chlorine (Total Residual)	200 mL	P, G	None Required	Immediate
Chlorine (Free Residual)	200 mL	P, G	None Required	Immediate
Color	50 mL	P, G	Cool, 4C	48 hours
Conductance	100 mL	P, G	Cool, 4C	28 days
Cyanide	1000 mL	P, G	Cool, 4C, NaOH to pH 12, 0.6g ascorbic	14 days
Hardness	100mL	P, G	HNO3 to pH <2	6 months
Nitrogen, Ammonia	400 mL	P, G	Cool, 4C, H2SO4 to pH <2	28 days
Nitrogen, Nitrate	100 mL	P, G	Cool, 4C, H2SO4 to pH <2	14 days
Nitrogen, Nitrite	100 mL	P, G	Cool, 4C 4	48 hours
Nitrogen, Nitrate/Nitrite	200 mL	P, G	Cool, 4C	14 days
Nitrogen, Organic	1000 mL	P, G	Cool, 4C, H2SO4 to pH <2	28 days
Nitrogen, Total (TKN)	500 mL	P, G	Cool, 4C, H2SO4 to pH <2	28 days
Oil & Grease	1000 mL	G only	Cool, 4C, H2SO4 to pH <2	28 days
Ph	25 mL	P, G	None Required	Immediate
Sulfate (as S)	100mL	P, G	Cool, 4C	28 days
Phosphorus, Ortho	50 mL	P, G	Filter, Cool,4 C	48 hours
Phosphorus, Total	50 mL	P, G	Cool, 4C, H2SO4 to pH <2	28 days
Solids, Dissolved	100 mL	P, G	Cool, 4C	7 days
Solids, Settleable	100 mL	P, G	Cool, 4C	48 hours
Solids, Suspended	100 mL	P, G	Cool, 4C	7 days
Solids, Total	100 mL	P, G	Cool, 4C	7 days
Solids, Volatile	100 mL	P, G	Cool, 4C	7 days
Turbidity	100 mL	P, G	Cool, 4C	48 hours
Total Dissolved Salts	100 mL	P, G	Cool, 4C	28 days

TEST	VOLUME	CONTAINER	PRESERVATION	HOLD TIME
Aluminum	100 mL	P , G	HNO3 to pH < 2	6 months
Antimony	100 mL	P , G	HNO3 to pH < 2	6 months
Arsenic	100 mL	P , G	HNO3 to pH < 2	6 months
Barium	100 mL	P , G	HNO3 to pH < 2	6 months
Boron	100 mL	P , G	HNO3 to pH < 2	6 months
Cadmium	100 mL	P , G	HNO3 to pH < 2	6 months
Calcium	100 mL	P , G	HNO3 to pH < 2	6 months
Chromium	100 mL	P , G	HNO3 to pH < 2	6 months
Cobalt	100 mL	P , G	HNO3 to pH < 2	6 months
Copper	100 mL	P , G	HNO3 to pH < 2	6 months
Gold	100 mL	P , G	HNO3 to pH < 2	6 months
Iron	100 mL	P , G	HNO3 to pH < 2	6 months
Lead	100 mL	P , G	HNO3 to pH < 2	6 months
Magnesium	100 mL	P , G	HNO3 to pH < 2	6 months
Manganese	100 mL	P , G	HNO3 to pH < 2	6 months
Mercury	100 mL	P , G	HNO3 to pH < 2	28 days
Molybdenum	100 mL	P , G	HNO3 to pH < 2	6 months
Nickel	100 mL	P , G	HNO3 to pH < 2	6 months
Phosphorus	100 mL	P , G	HNO3 to pH < 2	6 months
Platinum	100 mL	P , G	HNO3 to pH < 2	6 months
Potassium	100 mL	P , G	HNO3 to pH < 2	6 months
Selenium	100 mL	P , G	HNO3 to pH < 2	6 months
Silver	100 mL	P , G	HNO3 to pH < 2	6 months
Sodium	100 mL	P , G	HNO3 to pH < 2	6 months
Tin	100 mL	P , G	HNO3 to pH < 2	6 months
Zinc	100 mL	P , G	HNO3 to pH < 2	6 months

Samples submitted for any pesticide or herbicide analysis should be collected in glass only.
All samples should be cooled to four degrees C. A volume of one liter is required for extraction.

ULM Soil-Plant Analysis Laboratory Analyses Available
SOIL FERTILITY		OIL & GAS FIELD

SAFE DRINKING WATER		HEAVY METALS & MINERALS IN SOLIDS

PESTICIDE & HERBICIDE		OXIDATION PONDS

HEAVY METALS & MINERALS IN WATER		INDUSTRIAL EFFLUENT

WATER & WASTEWATER		MICROBIOLOGICAL

SEED TESTING		PLANT TESTING

ASBESTOS		FERTILIZER

LIGNITE		LIME