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^ USEPA Equivalent Methods for NPDES
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Lachat Methods List

» Download Complete Methods List   (PDF:1.6MB; 10/08)

Acetic Acid
Method No Range MDL Units Matrix
21-550-00-1-A 3 to 300 0.5 mg/L Beverages


Acidity
Method No Range MDL Units Matrix
10-305-31-1-A 3 to 500 mg CaCO 4 mg/L CaCO3/L Waters
10-305-31-1-B 1.0 to 30.0 0.19 mg/L CaCO3/L Waters
21-305-24-1-A 0.10 to 1.50 N/A g tartaric acid/mL Wines


Adipic Acid
Method No Range MDL Units Matrix
21-550-00-1-A 4.5 to 450 0.8 mg/L Beverages


Alkalinity
Method No Range MDL Units Matrix
10-303-31-1-A # 10 to 500 2.3 mg CaCO3/L Waters
10-303-31-1-D ^ 1 to 50 0.27 mg CaCO3/L Waters, wastewaters
10-303-31-2-B 10 to 200 3.0 mg CaCO3/L Waters
10-303-31-3-A * 50 to 400 2.7 mg CaCO3/L Waters
10-303-31-4-A 50 to 500 1.1 mg CaCO3/L Waters


Aluminum
Method No Range MDL Units Matrix
10-113-33-1-B 0.1 to 5.0 0.02 mg Al/L Waters
10-113-34-1-B 0.01 to 0.3 0.0015 mg Al/L Waters
12-113-33-1-B 1.0 to 30 0.1 mg Al/L Soil extracts
13-113-33-1-B 0.8 to 4.0 0.05 mg Al/L Plant tissue
10-113-33-1-C 0.01 to 0.3 0.001 mg Al/L Waters, wastewaters


Ammonia
Alkaline Phenol (Phenate) based methods
Method No Range MDL Units Matrix
10-107-06-1-B #* 0.05 to 5.0 0.007 mg N/L Waters
10-107-06-1-C # 0.02 to 4.0 0.004 mg N/L Waters
10-107-06-1-F ^ 10 to 100 1.0 mg N/L Waters
10-107-06-1-G 0.01 to 0.5 0.00153 mg N/L Waters, wastewaters
10-107-06-1-I # 0.1 to 30.0 0.01 mg N/L Waters
10-107-06-1-J # 0.01 to 2.0 0.002 mg N/L Waters
10-107-06-1-K # 0.2 to 20.0 0.01 mg N/L Waters
10-107-06-1-L 0.01 to 2.0 0.0028 mg N/L Waters, wastewaters
10-107-06-1-M ^ 0.01 to 2.0 0.01 mg N/L Waters, wastewaters
10-107-06-1-O ^ 2 to 500 0.56 µg N/L Waters, wastewaters
10-107-06-1-X ^ 0.05 to 20.0 0.007 mg N/L Waters
14-107-06-1-A 1.75 to 7.0 N/A % N/L Liquid Fertilizers
14-107-06-1-B 5.0 to 180 0.5 mg N/L Fertilizers
14-107-06-1-C 60 to 600 1.33 mg N/L Fertilizers
14-107-06-1-D 1.5 to 150 0.05 mg N/L Fertilizers
30-107-06-1-A # 0.1 to 20.0 N/A mg N/L Brackish Waters
31-107-06-1-B ^ 5 to 600 0.7 µg NH3-N/L Brackish or Seawater

Gas Diffusion methods
Method No Range MDL Units Matrix
10-107-06-5-B 0.10 to 1.0 0.01 mg N/L Waters
10-107-06-5-E 0.1 to 10.0 0302 mg N/L Waters, Wastewaters
10-107-06-5-G 0.1 to 0.9 0.005 mg N/L Waters. Wastewaters
10-107-06-5-H 10-90 1.5 µg N/L Waters, Wastewaters
31-107-06-5-A 2.5 to 10 0.091 µg N/L Brackish or Seawater

Sodium Salicylate based methods
Method No Range MDL Units Matrix
10-107-06-2-A * ^ 0.10 to 5.0 0.005 mg N/L Waters
10-107-06-2-L * ^ 0.05 to 20 0.01 mg N/L Waters, Wastewaters
10-107-06-3-B 0.05 to 1.0 0.008 mg N/L Waters
10-107-06-3-D 0.005 to 0.25 0.001 mg N/L Waters
10-107-06-4-D 0.5 to 80.0 0.10 mg N/L Waters
12-107-06-2-A 0.10 to 20.0 0.035 mg N/L Soil Extracts
12-107-06-2-E 0.05 to 10.0 0.016 mg N/L Soil Extracts
12-107-06-2-F 0.1-20 0.026 mg N/L 2M KCI
12-107-06-3-A 2.0 to 40.0 0.11 mg N/L Soil Extracts
12-107-06-3-B 0.2 to 4.0 0.01 mg N/L Soil Extracts
12-107-06-3-C 0.2 to 4.0 0.03 mg N/L Soil Extracts
14-107-06-2-B 400 to 800 N/A mg N/L Fertilizer
14-107-06-2-C 75 to 600 1.0 mg N/L Fertilizer
23-107-06-3-A 10 to 1000 N/A mg NH3/L Fermentation Beers
26-107-06-4-A 10 to 50.0 0.151 mg N/L Tobacco Extracts


Amylose
Method No Range MDL Units Matrix
20-244-00-1-A 1-500 0.044 mg Amylose/L Digests of Rice


Boron
Method No Range MDL Units Matrix
10-105-08-1-B 0.5 to 10.0 0302 mg B/L Waters
13-105-08-1-D 2.0 to 10.0 0.04 mg B/L Plant Tissue
13-105-08-1-E 1.0 to 4.0 0.10 mg B/L Plant Tissue
31-105-08-1-A 1.0 to 5.0 0.047 mg B/L Brackish Waters, Seawaters
70-105-08-2-A 0.25 to 10.0 0.035 mg B/L High Purity Water


Bromide
Method No Range MDL Units Matrix
10-135-21-2-B 0.5 to 10 0.075 mg Br-/L Waters, Wastewaters
18-135-21-2-B 0.5 to 10 0.05 mg Br-/L Brine
30-135-21-1-A 0.5 to 10.05 0.005 mg Br-/L Brackish Waters
30-135-21-1-B 5.0 to 60.0 0.22 mg Br-/L Brackish Waters


Calcium
Method No Range MDL Units Matrix
10-120-02-1-B 0.5 to 50.0 0.15 mg Ca/L Waters/Diluted
10-120-02-1-C 20 to 500 1.1 mg Ca/L Waters
14-120-02-1-B 5 to 120 0.5 mg Ca/L Fertilizer
14-120-02-1-C 750 to 2000 N.A mg Ca/L Fertilizer
15-120-02-4-A 5 to 250 1 mg Ca/L Feeds & Forages


Chlorate
Method No Range MDL Units Matrix
25-224-35-1-D 0.1 to 2.0 0.005 g NaClO3/L 70-200g NaOH/L
25-224-35-1-E 0.5 to 10 N/A NaClO3 29-34% w/w NaOH
25-224-35-1-F 1.0 to 20 N/A mg NaClO3/Kg 6-36% (w/w) NaOH, 1-3% w/w NaCl
25-224-35-1-G 0.1 to 2.0 0.005 g NaClO3/L 50-200g NaOH/L
25-224-35-1-H 0.25 to 3.0 0.005 mg NaClO3/L 135 to 275g NaCl/L, No NaOH


Chloride
Method No Range MDL Units Matrix
10-117-07-1-A #* 6 to 300 0.15 mg Cl-/L Waters
10-117-07-1-B ^ 2.5 to 100 0.5 mg Cl-/L Waters
10-117-07-1-C ^ 0.1 to 10.0 0.017 mg Cl-/L Waters
10-117-07-1-E ^ 5.0 to 2000 0.6 mg Cl-/L Waters
10-117-07-1-H # 2.5 to 100 0.2 mg Cl-/L Waters
10-117-07-1-I # 50 to 1000 1.0 mg Cl-/L Waters
19-117-07-1-A 0.08 to 4.0 0.02 mg Cl-/L 25% Sulfuric Acid
19-117-07-1-B 5 to 40 0.1 mg Cl-/L Planting baths/ Mineral processing
25-117-07-1-A 100 to 250 0.58 mg Cl-/L 70-200g NaOH/L
25-117-07-1-B 5 to 100 N/A mg Cl-/L 29-34% w/w NaOH
25-117-07-1-C 175 to 200 3.0 mg Cl-/L No NaOH


Chlorate
Method No Range MDL Units Matrix
10-124-13-1-A # 0.010 to .0400 0.004 mg Cr(VI)/L Waters
10-124-13-1-B 2 to 200 0.27 mg Cr(VI)/L Waters, Wastewaters
10-124-13-2-B 0.1-1.0 0.028 mg CN-/L Waters, Wastewaters


Chromium, Total
Method No Range MDL Units Matrix
10-141-13-2-A 0.1 to 10 0.028 mg Cr/L Waters, Wastewaters


Color
Method No Range MDL Units Matrix
10-308-00-1-A 50 to 280 2.1 color units Aqueous Solutions
21-308-100-1-A 0.250 to 0.700 N/A abs unit Beverages


Conductivity
Method No Range MDL Units Matrix
10-302-00-1-A # 5.94 to 575 0.5 µS/cm Waters
10-302-00-1-B # 146.9 to 6667 N/A µS/cm Waters
10-302-00-1-E 1 to 5.0 0.01 µS/cm DI or RO Water


Copper
Method No Range MDL Units Matrix
10-129-17-1-A 0.03 to 3.0 N/A Cu/L Waters, Wastewaters


Cyanide
Method No Range MDL Units Matrix
10-204-00-1-A # 0.005 to 0.5 0.005 mg CN-/L Waters
10-204-00-1-B ^ 0.50 to 50.0 N/A mg CN-/L Waters
10-204-00-1-D 0.20 to 10.0 0.003 mg CN-/L Waters
10-204-00-1-E 0.002 to 0.03 0.00045 mg CN-/L Waters
10-204-00-1-F ^ 50 to 500 N/A mg CN-/L Waters
10-204-00-1-G 2.0 to 500 0.5 µg CN-/L Waters, Wastewaters
10-204-00-1-H 2 to 100 0.21 µg CN-/L Waters, Wastewaters
10-204-00-1-V 0.005 to 0.50 0.0008 mg CN-/L Waters
10-204-00-1-X # 0.005 to 0.5 0.001 mg CN-/L Waters
10-204-00-1-X(2) ^ 0.002-0.5 0.38 ug mg CN-/L Waters, Wastewaters
10-204-00-2-C ^ 2 to 100 0.21 µg CN-/L Waters
10-204-00-2-D ^ 5 to 500 0.51 µg CN-/L Waters, Wastewaters
10-204-00-2-E ^ 2 to 100 0.5 µg CN-/L Waters, Wastewaters
10-204-00-2-G 2 to 100 0.40 µg CN-/L Waters, Wastewaters
10-204-00-3-A ^ 10 to 500 1.0 µg CN-/L Waters
10-204-00-4-B 2.0 to 100 0.16 mg CN-/L Waters, Wastewaters
10-204-00-5-A 2.0 to 400 0.65 µg CN-/L Waters, Wastewaters
10-204-00-5-B 2.0 to 500 0.914 µg CN-/L Waters, Wastewaters
10-204-00-5-X 5.0 to 500 0.975 µg CN-/L Waters, Wastewaters


Fluoride
Method No Range MDL Units Matrix
10-109-12-2-A # 0.10 to 5.0 0.05 mg F-/L Waters
10-109-12-2-B ^ 1 to 100 0.14 mg F-/L Waters
10-109-12-2-C ^ 0.10 to 2.0 0.02 mg F-/L Waters
10-109-12-2-D ^ 0.10 to 10.0 0.03 mg F-/L Waters
14-109-12-2-A 0.5 to 20 0.1 mg F-/L Fetilizer Digests
19-109-12-2-A 1.6 to 80 0.4 mg F-/L 34% ZnSO4
19-109-12-2-B 0.1 to 10 0.02 mg F-/L 34% ZnSO4


Formaldehyde
Method No Range MDL Units Matrix
10-221-00-1-A 1.0 to 10.0 0.033 mg HCHO/L Waters


Free Amino Nitrogen
Method No Range MDL Units Matrix
21-237-00-1-A 10-120   mg N/L Beer


Hardness, Total
Method No Range MDL Units Matrix
10-301-31-1-A # 5 to 100 0.24 CaCO3/L Waters
10-301-31-1-B #* 30 to 800 5.4 CaCO3/L Waters
10-301-31-1-C 125 to 1500 17.0 CaCO3/L Waters


Hydroxide
Method No Range MDL Units Matrix
25-225-25-1-A 70 to 200 10 g NaOH/L Chlor-Alkali
25-225-25-1-B 29 to 24% N/A w/w NaOH/L Chlor-Alkali
25-225-25-1-C 6 to 36% N/A w/w NaOH/L Chlor-Alkali
25-225-25-1-D 6 to 36% N/A w/w NaOH/L Chlor-Alkali


Hydroxy-Proline
Method No Range MDL Units Matrix
20-243-00-1-A 0.1 to 5.0 0.007 mg/L Food Stuffs


Hypochlorite
Method No Range MDL Units Matrix
25-226-36-1-B 1.25 to 10 0.20 mg NaOCl/L 70-200g NaOH/L
25-226-36-1-C 18.75 to 150 0.77 mg NaOCl/L 70-200g NaOH/L
25-226-36-1-D 3.0 to 37.5 0.5 mg NaOCl/L 50-200g NaOH/L
25-226-36-1-E 10 to 50 N/A mg NaOCl/L 50-150g NaOH/L
25-226-36-1-F 3 to 75 N/A mg NaOCl/L 50-200g NaOH/L


Iodate
Method No Range MDL Units Matrix
18-136-41-1-A 0.25 to 8.0 0.014 mg IO3-/L Aqueous Formulations


Iodide
Method No Range MDL Units Matrix
10-136-09-1-A 0.50 to 10.0 0.3 mg I-/L Waters
18-136-09-1-A 0.1 to 3.0 0.02 mg I-/L Aqueous Formulations


Iron
Method No Range MDL Units Matrix
10-126-18-1-A 0.1 to 5.0 0.01 mg Fe/L Waters
10-126-18-1-B 0.05 to 0.5 0.002 mg Fe/L Waters
10-126-18-1-C 1.0 to 5.0 0.01 mg Fe/L Waters, Wastewaters
10-126-18-1-D 0.1 to 5.0 0.01 mg Fe/L Waters, Wastewaters
31-126-18-1-B 0.05 to 0.500 0.004 mg Fe/L Brackish or Seawater
31-126-19-1-A 0.50 to 30.0 0.23 mg Fe/L Brackish or Seawater


Kjeldahl Nitrogen (TKN)
Method No Range MDL Units Matrix
10-107-06-2-D # 0.5 to 20 0.07 mg N/L Waters
10-107-06-2-E # 0.1 to 5.0 0.018 mg N/L Waters
10-107-06-2-H ^ 0.1 to 5.0 0.034 mg N/L Waters
10-107-06-2-I ^ 0.5 to 20.0 0.10 mg N/L Waters
10-107-06-2-K ^ 0.1 to 20.0 0.0093 mg N/L Waters
10-107-06-2-M # 0.25 to 25 0.05 mg N/L Waters, Wastewaters
10-107-06-2-N ^ 0.5 to 20 0.02 mg N/L Waters, Wastewaters
10-107-06-2-P ^ 0.25 to 25 0.056 mg N/L Waters, Wastewaters
13-107-06-1-A 1.0 to 25.0 0.1 mg N/L Plant
13-107-06-2-D * 10 to 150 0.5 mg N/L Soil/Plant
13-107-06-2-G * 1 to 50 0.12 mg N/L Plant or Soil Digests
14-107-06-2-A 5.0 to 200 0.04 mg N/L Dry Fertilizer
15-107-06-2-E 30 to 300 N/A mg N/L Feeds & Forages
15-107-06-2-F 7.5 yo 300 0.75 mg N/L Feeds & Forages
15-107-06-1-A 5 to 300 0.8 mg N/L Feeds & Forages

Gas Diffusion Methods
Method No Range MDL Units Matrix
10-107-06-5-F 0.1 to 10.0 0.01 mg N/L Waters, Wastewaters


Magnesium
Method No Range MDL Units Matrix
10-112-26-1-A 5 to 200 0.51 mg Mg/L Waters, Wastewaters
12-112-26-1-A 5 to 200 1.26 mg Mg/L Soil Extracts


Manganese
Method No Range MDL Units Matrix
10-131-35-1-B 0.2 to 10 0.005 mg Mn/L Waters
10-131-35-1-D 12.5 to 250 5.0 mg Mn/L Waters, Wastewaters
12-131-35-1-A 0.5 to 2.0 0.01 mg Mn/L Soils


Molybdenum
Method No Range MDL Units Matrix
12-123-23-1-B 0.1 to 4.0 0.007 mg Mo/L Soil Extracts
13-123-23-1-A 0.0625 to 0.25 0.0079 mg Mo/L Plant Tissue


Nitrate + Nitrite — See also Nitrite Section
Method No Range MDL Units Matrix
10-107-04-1-A #* 0.2 to 20.0 0.01 mg N/L Waters
10-107-04-1-B # 0.002 to 0.10 0.0003 mg N/L Waters
10-107-04-1-C # 0.01 to 2.0 0.002 mg N/L Waters
10-107-04-1-D ^ 0.5 to 50.0 N/A mg N/L Waters
10-107-04-1-F ^ 1 to 50.0 0.12 mg N/L Waters
10-107-04-1-H ^ 5 to 80.0 0.027 mg N/L Waters
10-107-04-1-J # 0.10 to 10.0 0.012 mg N/L Waters
10-107-04-1-K # 0.5 to 5.0 0.059 µg N/L Waters
10-107-04-1-L # 0.02 to 2.0 0.002 mg N/L Waters
10-107-04-1-O # 0.05 to 10.0 0.007 mg N/L Waters
10-107-04-1-Q ^ 5 to 800 0.49 µg N/L Waters, Wastewaters
10-107-04-1-R # ^ 0.025 to 20 0.0012 mg N/L Waters, Wastewaters
10-107-04-2-A #* 2 to 100 0.1 mg N/L Waters
10-107-04-2-B # 0.05 to 1.0 0.002 mg N/L Waters
10-107-04-2-C 0.005 to 0.2 0.0018 mg N/L Waters
10-107-04-2-D # 0.05 to 7 0.006 mg N/L Waters, Wastewaters
12-107-04-1-A 0.2 to 40.0 N/A mg N/L Soil Extracts
12-107-04-1-B 0.025 to 20.0 0.005 mg N/L Soil Extracts
12-107-04-1-C 0.2 to 20.0 N/A mg N/L Soil Extracts
12-107-04-1-E 0.05 to 5.0 N/A mg N/L Soil Extracts
12-107-04-1-F 0.01 to 2.0 0.0013 mg N/L Soil Extracts
12-107-04-1-G 1.0 to 20.0 0.01 mg N/L Soil Extracts
12-107-04-1-H 0.05 to 10.0 0.011 mg N/L Soil Extracts
12-107-04-1-J 0.025 to 20 0.003 mg N/L 2M KCI
13-107-04-1-A 0.2 to 20.0 N/A mg N/L Plant
13-107-04-1-B 0.02 to 2..0 0.003 mg N/L Plant
14-107-04-1-A 1790 to 7140 N/A mg N/Kg as NO3- Liquid Fertilizers
14-107-04-1-B 30 to 300 0.38 mg N/L Fertilizers
14-107-04-1-C 30 to 70.0 N/A mg N/L Fertilizers
18-107-04-1-A 0.5 to 2.5 0.017 mg N/L 31% KOH
18-107-04-1-D 0.02 to 0.75 0.0030 mg N/L Brine
19-107-04-1-A 2.0 to 100 0.4 µg N/L Sulfuric Acid
19-107-04-1-B 0.0125 to 2.0 0.0013 mg N/L Planting Baths/ Mineral Processing
20-107-04-1-B 0.25 to 5 0.018 mg N/L Dairy Products
20-107-04-1-B 0.025 to 0.5 0.013 mg N/L Dairy Products
20-107-04-1-C 0.25 to 5.0 0.021 mg NO3/L Dairy Products
26-107-04-1-A 10 to 50.0 0.103 mg N/L Tobacco Extracts
26-107-04-2-A 10 to 100 0.25 mg N/L Tobacco Extracts
30-107-04-1-A # 0.05 to 1.00 0.007 mg N/L Seawater
31-107-04-1-A ^ 1.25 to 5.0 0.03 µM N Brackish or Seawater
31-107-04-1-C ^ 5.0 to 50.0 0.12 µM N Brackish or Seawater
31-107-04-1-D ^ 0.5 to 14 0.2 µg N/L Brackish or Seawater
31-107-04-1-E ^ 5 to 400 0.51 µg N/L Brackish or Seawater
60-107-04-1-A 0.1 to 5 0.05 µM N Biological Fluids


Nitrite
Method No Range MDL Units Matrix
10-107-05-1-A # 0.01 to 10.0 0.005 mg N/L Waters
10-107-05-1-B ^ 0.014 to 0.07 0.0004 mg N/L Waters
10-107-05-1-C ^ 0.02 to 2.0 0.0016 mg N/L Waters
10-107-05-1-O ^ 10 to 1000 4 µg NO2-/L Waters
31-107-05-1-A ^ 1.25 to 5.0 0.02 µg N/L Brackish or Seawater


Nitrogen
Method No Range MDL Units Matrix
10-107-04-3-A * 200 to 2000 5.6 µg N/L Waters
10-107-04-3-B * 0.5 to 30.0 0.1 mg N/L Waters
10-107-04-3-C 0.5 to 10.0 0.011 mg N/L Waters
10-107-04-3-D 0.05 to 5.0 0.003 mg N/L Waters, wastewaters
10-107-04-3-P 0.2 to 10.0 0.05 mg N/L Waters
10-107-04-4-A 0.5 to 10 0.02 mg N/L Waters, Wastewaters
10-107-04-4-B 0.02 to 5.0 0.006 mg N/L Waters, Wastewaters
10-107-06-2-O ^ 10 to 500 1.1 µg N/L Waters, Wastewaters
12-107-04-1-I 0.3 to 10 0.013 mg N/L 2M KCI
12-107-04-3-B 0.2 to 30.0 0.04 mg N/L Soil Extracts
31-107-04-1-G ^ 0.25 to 10 0.05 mg N/L Brackish or Seawater
31-107-04-3-A 0.1 to 1.0 0.0049 mg N/L Brackish or Seawater
31-107-04-3-B 500 to 5000 78 µg N/L Brackish or Seawater
31-107-04-4-A 0.71 to 7.14 0.04 µM N Brackish or Seawater
31-107-04-4-B 0.02 to 5.0 0.0068 mg N/L Brackish or Seawater
31-107-06-1-F ^ 0.005 to 2.0 0.002 mg N/L Brackish or Seawater
31-107-06-4-A 1 to 30 0.1 µg N/L Brackish or Seawater


pH
Method No Range MDL Units Matrix
10-304-24-2-E 3.0 to 12.0 N/A pH units Waters


Phenol
Method No Range MDL Units Matrix
10-210-00-1-A # 5 to 200 0.6 µg phenol/L Waters
10-210-00-1-B # 0.05 to 2.0 0.002 mg phenol/L Waters
10-210-00-1-X ^ 0.005 TO 0.2 0.0034 mg phenol/L Waters
10-210-00-1-Y ^ 0.5 to 50 0.4 mg phenol/L Waters
10-210-00-3-A ^ 2 to 200 0.28 µg phenol/L Waters, Wastewaters
10-210-00-3-B ^ 5 to 500 3.0 µg phenol/L Waters, Wastewaters


Phosphate, Ortho
Molybdate-Based Methods
Method No Range MDL Units Matrix
10-115-01-1-A # 0.01 to 2.0 0.002 mg P/L Waters, Wastewaters
10-115-01-1-B # 0.01 to 0.20 0.0007 mg P/L Waters
10-115-01-1-M # 1 to 100 0.1 mg P/L Waters, Wastewaters
10-115-01-1-O # 2.0 to 20 N/A mg P/L Waters, Wastewaters
10-115-01-1-P # 0.5 to 2.00 0.005 mg P/L Waters
10-115-01-1-Q # 0.010 to 0.20 0.0003 mg P/L Waters
10-115-01-1-T # 0.025 to 2.5 0.005 mg P/L Waters
10-115-01-1-V * # ^ 0.01 to 2.0 0.0012 mg P/L Waters, Wastewaters
12-115-01-1-A 0.25 to 10.0   mg P/L Soil Extracts
12-115-01-1-B 0.01 to 1.0 0.006 mg P/L Soil Extracts
12-115-01-1-E 0.25 to 10.0 0.02 mg P/L Soil Extracts
12-115-01-1-I 0.5 to 20.0 0.02 mg P/L Soil Extracts
12-115-01-1-J 1.25 to 50.0 0.125 mg P/L Soil Extracts
12-115-01-1-K 1.0 to 30.0 N/A mg P/L Soil Extracts
12-115-01-1-L 0.05 to 6.0 0.01 mg P/L Soil Extracts
12-115-01-1-M 0.25 to 10 0.04 mg P/L Soil Extracts
12-115-01-1-N 0.4 to 20 0.07 mg P/L Soil Extracts
18-115-01-1-B 0.25 to 10 0.01 mg P/L 0-10% NaCl
19-115-01-1-A 0.02 to 2.0 0.01 mg P/L Mineral Processing
31-115-01-1-G ^ 2.0 to 10.0 0.02 mg P/L Brackish or Seawater
31-115-01-1-H ^ 5 to 400 1.0 mg P/L Brackish or Seawater
31-115-01-1-I ^ 1 to 100 0.25 mg P/L Brackish or Seawater


Phosphorus
Method No Range MDL Units Matrix
31-115-01-4-B 0.005 to 1.0 0.0038 mg P/L Brackish or Seawater


Molybdate-Based Methods
Method No Range MDL Units Matrix
10-115-01-1-C # 0.1 to 5.0 0.015 mg P/L Waters
10-115-01-1-D # 0.05 to 0.5 0.002 mg P/L Waters
10-115-01-1-E # 0.2 to 10.0 0.1 mg P/L Waters
10-115-01-1-F # 0.003 to 0.2 0.0009 mg P/L Waters
10-115-01-1-I ^ 0.1 to 5.0 0.007 mg P/L Waters, Wastewaters
10-115-01-2-B # 0.10 to 10 0.010 mg P/L Waters, Wastewaters
10-115-01-3-A ^ 0.1 to 10.0 0.007 mg P/L Waters
10-115-01-3-B * ^ 0.1 to 4.0 0.01 mg P/L Waters
10-115-01-3-C * ^ 0.05 to 1.0 0.0011 mg P/L Waters
10-115-01-3-D * 0.10 to 1.0 0.0033 mg P/L Waters and Seawaters
10-115-01-3-E ^ 10 to 500 1.4 µg P/L Waters, Wastewaters
10-115-01-3-F ^ 2 to 100 0.42 µg P/L Waters, Wastewaters
10-115-01-4-B 0.05 to 1.0 0.006 mg P/L Waters, Wastewaters
10-115-01-4-I ^ 0.2 to 20.0 N/A mg P/L Waters
10-115-01-4-J * ^ 0.2 to 10 0.0033 mg P/L Waters, Wastewaters
10-115-01-4-S ^ 0.05 to 10 0.002 mg P/L Waters, Wastewaters
10-115-01-4-U ^ 0.01 to 0.2 0.0008 mg P/L Waters
13-115-01-1-B * 1.0 to 50.0 0.08 mg P/L Soil/Plant Digests
15-115-01-4-A 2 to 100 0.1 mg P/L Feeds & Forages
18-115-01-1-C 5 to 375 0.5 mg P/L Aqueous Formulations
18-115-01-3-B 12.5 to 375 N/A mg P/L Aqueous Formulations
18-115-01-4-A 0.01 to 1.0 0.002 mg P/L Organic Oils
30-115-01-4-A 0.01 to 0.50 mg P/L Brackish Waters
21-115-01-1-A 15 to 70 0.05 mg H3PO4/dL Beverages
31-115-01-1-J ^ 0.01 to 2.0 0.002 mg P/L Brackish or Seawater
31-115-01-3-D ^ 0.050 to 1.0 0.002 mg P/L Brackish or Freshwater
31-115-01-4-A ^ 12.5 to 400 1.66 µg P/L Brackish or Seawater

Vanadate-Based Methods
Method No Range MDL Units Matrix
13-115-01-2-A 1.0 to 80 0.095 mg P/L Plant Digests
13-115-01-2-B 20 to 100 0.2 mg P/L Plant Tissue
14-115-01-2-A 10 to 180 0.2 mg P/L Fertilizer (HCI Digest)
14-115-01-2-B 400 to 1600 0.2 mg P2O5/L HCI Digests
14-115-01-2-E 72 to 180 0.02 mg P/L Fertilizers
14-115-01-2-F 1200 to 2400 N/A mg P2O5/L Fertilizers
14-115-01-2-G 30 to 65 N/A % P2O5/L P2O5 in H3PO4
15-115-01-2-C 2.5 to 100 0.35 mg P/L Feeds & Forages
15-115-01-3-A 5.0 to 400 1.2 mg P2O5/L Feeds & Forages
15-115-01-3-B 20 to 800 1 mg P2O5/L Fertilizer
20-115-01-2-B 100 to 1500 0.71 mg PO4/L Food Stuffs


Potassium
Method No Range MDL Units Matrix
10-119-03-1-A 2.0 to 100 0.33 mg K/L Waters
12-119-03-1-A 0.20 to 10.0 0.01 mg K/L Soil Extracts
12-119-03-1-B 1.0 to 50.0 0.2 mg K2O/L Soil Extracts
12-119-03-1-C 1.0 to 20.0 0.1 mg K2O/L Soil Extracts
12-119-03-1-D 5 to 200 0.126 mg K/L Soil Extracts
13-119-03-1-B 100 to 400 0.14 mg K/L Ashed Plant
14-119-03-1-A 80 to 320 N/A mg K2O/L Liquid Fertilizers
14-119-03-1-B 5 to 250 0.4 mg K/L Fertilizers, HCI Digest
14-119-03-1-C 100 to 250 N/A mg K/L Fertilizers
14-119-03-1-D 20 to 450 1.02 mg K20/L Fertilizer Digests


Pyruvate
Method No Range MDL Units Matrix
21-230-00-1-A 10 to 100 0.8 mg pyruvate/L Milk


Silicate
Method No Range MDL Units Matrix
10-114-27-1-A # 0.2 to 20 0.04 mg SiO2/L Waters
10-114-27-1-B ^ 0.01 to 0.1 0.00078 mg SiO2/L Waters
31-114-27-1-A ^ 20 to 100 0.2 µM Si Brackish or Seawater
31-114-27-1-B ^ 1.25 to 5.0 0.01 µM Si Brackish or Seawater
31-114-27-1-D ^ 10 to 1700 1.43 µg Si/L Brackish or Seawater


Sodium
Method No Range MDL Units Matrix
10-111-32-1-A ^ 5.0 to 300 1.2 mg Na/L Waters


Sorbic Acid
Method No Range MDL Units Matrix
26-228-38-1-A 2.0 to 10.0 0.18 mg sorbic acid/L Tobacco Extract


Sugars
Method No Range MDL Units Matrix
26-201-00-1-B 10 to 500 N/A mg glucose/L Tobacco


Sulfate
Methylthymol Blue (MTB) Methods
Method No Range MDL Units Matrix
10-116-10-2-A # 5.0 to 100 1.8 mg SO42-/L Waters
10-116-10-2-B # 50 to 300 7.2 mg SO42-/L Waters
10-116-10-2-E 2 to 40 0.36 mg SO42-/L Waters, wastewaters

Turbidimetric Methods
Method No Range MDL Units Matrix
10-116-10-1-A ^ 3.0 to 300 0.95 mg SO42-/L Waters
10-116-10-1-C ^ 0.5 to 10.0 0.2 mg SO42-/L Waters
10-116-10-1-E ^ 10 to 100 0.6 mg SO42-/L Waters
10-116-10-1-G ^ 50 to 2000 N/A mg SO42-/L Waters
12-116-10-1-D 1 to 20 0.67 mg S/L Soil Extracts
14-116-10-1-A 10-360 N/A mg SO42-/L Fertilizer (HCI Digest)


Sulfide
Method No Range MDL Units Matrix
10-116-29-1-A ^ 0.02 to 2.0 0.005 mg S/L Waters
10-116-29-1-C ^ 25 to 100 0.58 mg S/L Waters
10-116-29-3-A ^ 0.05 to 2.0 0.01 mg S/L Waters, Wastewaters
10-116-29-3-B ^ 0.2 mg S/L Waters, Wastewaters


Sulfite
Method No Range MDL Units Matrix
10-116-11-1-A 0.1 to 3.0 N/A mg SO32-/L Waters
21-116-11-2-D 0.5 to 30 0.25 mg SO32-/L Wines


Sulfer Dioxide
Method No Range MDL Units Matrix
24-116-42-1-A 0.08 to 2.4 0.008 SO2/L Air Sampling Filter Extracts


Surfactants
Method No Range MDL Units Matrix
10-306-00-1-C ^ 0.010 to 1.0 0.0029 mg SDS/L Waters, Wastewaters
10-306-00-1-D ^ 0.010 to 1.0 0.0024 mg SDS/L Waters, Wastewaters
10-306-00-1-E 0.2 to 20.0 0.05 mg SDS/L Waters, Wastewaters


Thiocyanate
Method No Range MDL Units Matrix
10-229-00-1-A 0.1 to 2.0 0.02 mg SCN-/L Waters


Total Amino Acids
Method No Range MDL Units Matrix
18-218-00-1-A 1.25 to 40 0.22 mM Leucine Aqueous Formulations


Urea
Method No Range MDL Units Matrix
10-206-00-1-A 0.1 to 20 0.007 mg N/L Waters, wastewaters
10-206-00-1-B 15 to 500 3.3 µg N/L Waters, wastewaters
14-206-00-2-A 75 to 600 1.0 mg N/L Fertilizer Digests
14-206-00-3-B 4.5 to 18 N/A %N (w/w) Liquid Fertilizer
14-206-00-3-C 60 to 600 0.97 mg N/L Fertilizer
14-206-00-3-D 60 to 150 0.07 mg N/L Fertilizer
31-206-00-1-A 10 to 400 2.9 µg N/L Brackish or Seawater
31-206-00-1-B 0.2 to 20 0.026 µg N/L Brackish or Seawater


Zinc
Method No Range MDL Units Matrix
10-130-18-2-A 0.1 to 5 0.007 mg Zn/L Waters
12-130-18-2-A 1.25 to 5.0 0.004 mg Zn/L Soil Extracts

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