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DR 1900 Portable Spectrophotometer

Product #: DR1900-01H

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Parameter/Range/Reagent Information

Alkalinity	Method	Range	Reagent Set(s)	USEPA Compliant?
	10239 TNTplus	25 - 400 mg/L as CaCO₃	View

Aluminum	Method	Range	Reagent Set(s)	USEPA Compliant?
	10215 TNTplus	0.02 - 0.50 mg/L Al	View
	8012 Spectrophotometer, Powder Pillows	0.008 - 0.800 mg/L Al	View
	8326 Eriochrome Cyanine R	0.006 - 0.250 mg/L Al	View

Ammonia	Method	Range	Reagent Set(s)	USEPA Compliant?
	10023 Test 'N Tube LR Salicylate	0.02 - 2.50 mg/L NH₃-N	View
	10031 Test 'N Tube HR Salicylate	0.4 - 50.0 mg/L NH₃-N	View
	10205 HR TNTplus 832	2 - 47 mg/L NH₃-N	View	Y
	10205 LR TNTplus 831	1 - 12 mg/L NH₃-N	View	Y
	10205 UHR TNTplus 833	47 - 130 mg/L NH₃-N	View	Y
	10205 ULR TNTplus 830	0.015 - 2.00 mg/L NH₃-N	View	Y
	8038 Nessler	0.02 - 2.50 mg/L NH₃-N	View	Y
	8155 Powder Pillows Salicylate	0.01 - 0.50 mg/L NH₃-N	View

Ammonia, Free	Method	Range	Reagent Set(s)	USEPA Compliant?
	10200 Spectrophotometer Powder Pillows	0.01 - 0.50 mg/L NH₃-N	View
	10201 Spectrophotometer Powder Pillows Indophenol Method	0.01 - 0.50 mg/L NH₃-N	View

Anammox Activity	Method	Range	Reagent Set(s)	USEPA Compliant?
	10304 TNTplus 882	0 - 1000 mAbs (milli absorptions)	View
	10304 TNTplus 882	0 - 33.4 µmol/L (Cytochrome C from horse heart)	View

Arsenic	Method	Range	Reagent Set(s)	USEPA Compliant?
	8013	0 - 0.200 mg/L As	View	Y

Barium	Method	Range	Reagent Set(s)	USEPA Compliant?
	10251 Spectrophotometer Powder Pillows	2 - 10,000 mg/L Ba
	8014 Turbidimetric	2 - 100 mg/L Ba	View

Benzotriazole / Tolyltriazole	Method	Range	Reagent Set(s)	USEPA Compliant?
	8079 Powder Pillows UV Photolysis	1.0 - 16.0 mg/L Benzotriazole	View
	8079 Powder Pillows UV Photolysis	1.0 - 20.0 mg/L Tolyltriazole	View

Boron	Method	Range	Reagent Set(s)	USEPA Compliant?
	10252 Carmine Method Powder Pillows	2 - 50 mg/L B	View
	10274 TNTplus 877	0.05 - 2.5 mg/L B	View
	8015 Carmine	0.2 - 14.0 mg/L B	View

Bromine	Method	Range	Reagent Set(s)	USEPA Compliant?
	8016 DPD Method, PP or AccuVac	0.05 - 4.50 mg/L Br₂	View

Cadmium	Method	Range	Reagent Set(s)	USEPA Compliant?
	10217 TNTplus	0.02 - 0.30 mg/L Cd	View
	8017 Dithizone	0.7 - 80 µg/L Cd	View

Cationic Surfactants	Method	Range	Reagent Set(s)	USEPA Compliant?
	10305 TNTplus 885	0.2 - 2.0 mg/L Cetyltrimethylammonium bromide

Chloride	Method	Range	Reagent Set(s)	USEPA Compliant?
	10291 Chloride TNTplus	1.0 - 70 mg/L Cl⁻	View
	10291 Chloride TNTplus	70 - 1000 mg/L Cl⁻	View
	8113	0.1 - 25.0 mg/L Cl⁻	View

Chlorine Dioxide	Method	Range	Reagent Set(s)	USEPA Compliant?
	10126 DPD	0.05 - 5.00 mg/L ClO₂	View	Y
	10126 DPD Powder Pillows or AccuVac	0.04 - 5.00 mg/L ClO₂	View	Y
	8065 LR Chlorophenol Red	0.01 - 1.00 mg/L ClO₂	View
	8138 Spectrophotometer HR Direct Reading	5 - 1000 mg/L	View
	8345 MR Direct Reading Method Direct Reading	1 - 50.0 mg/L ClO₂	View
	Amaranth	20 - 500 µg/L

Chlorine, Free	Method	Range	Reagent Set(s)	USEPA Compliant?
	10059 DPD Rapid Liquid Method, Pour-Thru Cell™ DPD Rapid Liquid Method for Free Chlorine	0.02 - 2.00 mg/L Cl₂	View
	10069 DPD, HR Powder Pillows	0.1 - 10.0 mg/L Cl₂	View
	10102 DPD Test 'N Tube	0.09 - 5.00 mg/L Cl₂	View
	10231 Spectrophotometer,TNTplus DPD	0.05 - 2.00 mg/L Cl₂	View	Y
	10241 Powder Pillows Indophenol	0.04 - 4.50 mg/L Cl₂	View
	10245 DPD, MR Powder Pillows	0.05 - 4.00 mg/L Cl₂	View
	8021 DPD Powder Pillows or AccuVac®	0.02 - 2.00 mg/L Cl₂	View	Y

Chlorine, Total	Method	Range	Reagent Set(s)	USEPA Compliant?
	10014 DPD	2 - 500 µg/L ULR as Cl₂	View
	10060 DPD Rapid Liquid, Pour-Thru Cell	0.02 - 2.00 mg/L Cl₂	View
	10070 DPD Powder Pillows	0.1 - 10.0 mg/L as Cl₂	View	Y
	10101 DPD Test 'N Tube	0.09 - 5.00 mg/L Cl₂	View
	10232 Spectrophotometer DPD TNTplus DPD	0.05 - 2.00 mg/L Cl₂	View	Y
	8167 DPD Powder Pillows or AccuVac®	0.02 - 2.00 mg/L Cl₂	View	Y
	8370 DPD	2 - 500 µg/L - as Cl₂	View	Y

Chromium, Hexavalent	Method	Range	Reagent Set(s)	USEPA Compliant?
	8023 1,5-Diphenylcarbohydrazide	0 - 1.00 mg/L Cr⁶⁺	View	Y
	8023 Powder Pillows or AccuVac®	0.010 - 0.700 mg/L Cr⁶⁺	View	Y

Chromium, Hexavalent and Total	Method	Range	Reagent Set(s)	USEPA Compliant?
	10218 Hexavalent, TNTplus	0.03 - 1.00 mg/L Cr	View	Y
	10219 Total, TNTplus	0.03 - 1.00 mg/L Cr	View	Y

Chromium, Total	Method	Range	Reagent Set(s)	USEPA Compliant?
	8024 Spectrophotometer Powder Pillows	0.01 - 0.70 mg/L Cr	View

Cobalt	Method	Range	Reagent Set(s)	USEPA Compliant?
	8078 Spectrophotometer Powder Pillows	0.01 - 2.00 mg/L Co	View

COD (Chemical Oxygen Demand)	Method	Range	Reagent Set(s)	USEPA Compliant?
	10067 (Manganese III without chloride removal) Spectrophotometer Manganese III Reactor Digestion Method	30 - 1,000 mg/L	View
	10211 TNTplus ULR	1.0 - 60.0 mg/L	View
	10212 TNTplus (UHR)	5 - 60 g/L COD (UHR)	View
	10212 TNTplus UHR	250 - 15,000 mg/L	View
	10236 TNTplus HR Mercury-Free Reactor Digestion	25 - 1,000 mg/L	View
	10299 TNTplus 815	7 - 70 mg/L COD (LR)	View
	10299 TNTplus 816	70 - 700 mg/L COD (HR)	View
	8000 Reactor Digestion	0.7 - 40.0 mg/L	View
	8000 Reactor Digestion	20 - 1500 mg/L	View	Y
	8000 Reactor Digestion	200 - 15,000 mg/L	View
	8000 Reactor Digestion	3 - 150 mg/L	View	Y
	8000 TNTplus LR, HR	20 - 1,500 mg/L HR	View	Y
	8000 TNTplus LR, HR	3 - 150 mg/L LR	View	Y

Color	Method	Range	Reagent Set(s)	USEPA Compliant?
	8025 True and Apparent, HR Platinum-Cobalt	15 - 500 Units	View

Copper	Method	Range	Reagent Set(s)	USEPA Compliant?
	8026 CuVer 2 AccuVac® Bicinchoninate	0.04 - 5.00 mg/L Cu	View
	8143 Powder Pillows	1 - 210 µg/L Cu	View
	8506 CuVer 1 Powder Pillows Bicinchoninate	0.04 - 5.00 mg/L Cu	View	Y

Cyanide	Method	Range	Reagent Set(s)	USEPA Compliant?
	10265 Pyridine Barbituric Acid	0.01 - 0.60 mg/L CN-		Y
	8027 Powder Pillows Pyridine-Pyrazalone	0.002 - 0.240 mg/L CN-	View

Cyanuric Acid	Method	Range	Reagent Set(s)	USEPA Compliant?
	8139 Spectrophotometer Powder Pillows Turbidimetric	5 - 50 mg/L	View

Detergents / Surfactants	Method	Range	Reagent Set(s)	USEPA Compliant?
	8028 Spectrophotometer, Crystal Violet	0.002 - 0.275 mg/L as LAS	View

Dissolved Oxygen	Method	Range	Reagent Set(s)	USEPA Compliant?
	8166 AccuVac® HR HRDO	0.3 - 15.0 mg/L O₂	View
	8316 Spectrophotometer AccuVac® Indigo Carmine	6 - 800 µg/L O₂	View
	8333 Ultra High Range, AccuVac	1.0 - 40.0 mg/L O₂	View

Fluoride	Method	Range	Reagent Set(s)	USEPA Compliant?
	10225 SPADNS 2	0.1 - 2.0 mg/L	View	Y
	10225 SPADNS 2, Reagent Solution or AccuVac	0.02 - 2.00 mg/L F^-	View	Y
	10225 SPADNS 2, TNTplus 878	0.1 - 2.5 mg/L F	View	Y
	8029 Reagent Solution or AccuVac	0.02 - 2.00 mg/L F^-	View	Y

Formaldehyde	Method	Range	Reagent Set(s)	USEPA Compliant?
	10295 Formaldehyde TNTplus	0.5 - 10.0 mg/L H₂CO	View
	8110 MBTH	3 - 500 µg/L CH₂O	View

Hardness	Method	Range	Reagent Set(s)	USEPA Compliant?
	10293 Hardness, Calcium/Magnesium	20 - 350 mg/L CaCO3	View
	10293 Hardness, Calcium/Magnesium	Hardness, Ca/Mg 10293 3-50 mg/L Mg	View
	10293 Hardness, Calcium/Magnesium	Hardness, Ca/Mg 10293 5-100 mg/L Ca	View
	8030 Ca & Mg Calmagite Colorimetric Calmagite Colorimetric	0.05 - 4.00 mg/L Ca and Mg as CaCO₃	View
	8374 Chlorophosonazo Rapid liquid, Pour-Thru Cell Chlorophosphonazo Colorimetric	4 - 1,000 µg/L CaCO₃	View
	8374 Chlorophosphonazo Colorimetric, Solution Pillow	8 - 1,000 µg/L CaCO₃	View

Hydrazine	Method	Range	Reagent Set(s)	USEPA Compliant?
	8141 Spectrophotometer, Reagent Solution or AccuVac p-Dimethylaminobenzaldehyde	4 - 600 µg/L N₂H₄	View

Hydrogen Peroxide	Method	Range	Reagent Set(s)	USEPA Compliant?
	10290 Powder Pillows	0.1 - 10.0 mg/L PAA / H2O2	View

Iodine	Method	Range	Reagent Set(s)	USEPA Compliant?
	8031 Spectrophotometer, Powder Pillows or AccuVac DPD	0.07 - 7.00 mg/L I₂	View

Iron	Method	Range	Reagent Set(s)	USEPA Compliant?
	10229 TNTplus™	0.2 - 6.0 mg/L Fe	View	Y
	10249 FerroVer® Powder Pillows	0.1 - 300.0 mg/L Fe	View
	8008 FerroVer® Powder Pillows or AccuVac	0.02 - 3.00 mg/L Fe	View	Y
	8112 Spectrophotometer Powder Pillows or AccuVac	0.012 - 1.800 mg/L Fe	View
	8112 TPTZ	0.01 - 1.70 mg/L Fe	View
	8146 Powder Pillows or AccuVac® 1,10 Phenanthroline	0.02 - 3.00 mg/L Fe²⁺	View
	8147 FerroZine® Solution Pillows	0.009 - 1.400 mg/L Fe	View
	8147 Spectrophotometer FerroZine® Rapid Liquid, Pour Thru Cell FerroZine	0.009 - 1.400 mg/L Fe	View
	8365 FerroMo® Powder Pillows FerroMo	0.01 - 1.80 mg/L Fe	View

Lead	Method	Range	Reagent Set(s)	USEPA Compliant?
	10216 Spectrophotometer TNTplus™	0.1 - 2.0 mg/L Pb	View
	8033 Spectrophotometer Powder Pillows Dithizone	3 - 300 µg/L Pb	View	Y
	8317 Spectrophotometer LeadTrak™ Column Extraction LeadTrak Fast Column Extraction	5 - 150 µg/L Pb	View

Magnesium, Total	Method	Range	Reagent Set(s)	USEPA Compliant?
	10292 TNTplus	0.5 - 10 mg/L Mg	View
	10292 TNTplus	10 - 50 mg/L	View

Manganese	Method	Range	Reagent Set(s)	USEPA Compliant?
	8034 Periodate Oxidation	0.2 - 20 mg/L Mn
	8034 Powder Pillows Periodate Oxidation	0.1 - 20.0 mg/L Mn	View	Y
	8149 PAN	0.01 - 0.70 mg/L Mn	View
	8149 Powder Pillows PAN Method	0.006 - 0.700 mg/L Mn	View

Mercury	Method	Range	Reagent Set(s)	USEPA Compliant?
	10065 Cold Vapor Mercury Concentration	0.1 - 2.5 µg/L Hg	View

Molybdenum	Method	Range	Reagent Set(s)	USEPA Compliant?
	8036 Mercaptoacetic Acid	0 - 35.0 mg/L Mo	View
	8036 Mercaptoacetic Acid	0.3 - 40.0 mg/L Mo	View
	8036 Powder Pillows or AccuVac Mercaptoacetic Acid	0.2 - 40.0 mg/L Mo	View
	8169 Powder Pillows Ternary Complex	0.02 - 3.00 mg/L Mo	View

Monochloramine	Method	Range	Reagent Set(s)	USEPA Compliant?
	10171 Indophenol LR, Powder Pillows	0.04 - 4.50 mg/L Cl₂	View
	10172 Indophenol Method Test 'N Tube	0.1 - 10.0 mg/L Cl₂	View
	10200 Monochloramine/Free Ammonia Powder Pillows	0.04 - 4.50 mg/L Cl₂	View

Nickel	Method	Range	Reagent Set(s)	USEPA Compliant?
	8037 Spectrophotometer Powder Pillows Heptoxime	0.02 - 1.80 mg/L Ni	View	Y
	8150 1-(2 Pyridylazo)-2 Napthol (PAN)	0.01 - 1.00 mg/L Ni	View
	8150 1-(2 Pyridylazo)-2 Napthol (PAN)	0.02 - 2.00 mg/L Co	View
	8150 Powder Pillows PAN	0.006 - 1.000 mg/L Ni	View

Nitrate	Method	Range	Reagent Set(s)	USEPA Compliant?
	10020 Spectrophotometer, Test 'T Tube Chromotropic Acid Method	0.2 - 30.0 mg/L NO₃^--N	View
	10206	0.2 - 13.5 mg/L NO₃^⁻-N	View	Y
	10206 Spectrophotometer, HR, TNTplus 836	22 - 155 mg/L NO₃	View	Y
	10206 Spectrophotometer, HR, TNTplus 836	5 - 35 mg/L NO₃^⁻-N	View	Y
	10206 Spectrophotometer, LR, TNTplus 835	.23 - 13.50 mg/L NO₃⁻-N	View	Y
	10206 Spectrophotometer, LR, TNTplus 835	1.00 - 60.00 mg/L NO₃	View	Y
	8039 Powder Pillows or AccuVac® Cadmium Reduction	0.3 - 30.0 mg/L NO₃^--N	View
	8171	0.1 - 5.0 mg/L NO₃-N	View
	8171 Spectrophotometer Powder Pillows or AccuVac	0.1 - 10.0 mg/L NO₃^--N	View
	8192 Powder Pillows LR Cadmium Reduction	0.01 - 0.50 mg/L NO₃^--N	View

Nitrite	Method	Range	Reagent Set(s)	USEPA Compliant?
	10019 Test 'N Tube Vials Diazotization	0.003 - 0.500 mg/L NO₂^--N	View
	10207 Spectrophotometer, TNTplus 839	0.015 - 0.600 mg/L NO₂^--N	View	Y
	10237 Spectrophotometer, TNTplus™ 840	0.6 - 6.0 mg/L NO₂^--N (2.0-20.0 mg/L NO₂^-)	View
	10296 Diazotization Method, TNTplus™ 841	2 - 90 mg/L NO₂⁻-N	View
	10296 Diazotization Method, TNTplus™ 841	7 - 295 mg/L NO₂⁻-N (UHR)	View
	8153 Spectrophotometer HR, Powder Pillows	2 - 250 mg/L NO₂^-	View
	8507 Diazotization	0.02 - 0.30 mg/l NO₂-N	View	Y
	8507 Spectrophotometer Powder Pillows or AccuVac®	0.002 - 0.300 mg/L NO₂^--N	View	Y

Nitrogen, Ammonia	Method	Range	Reagent Set(s)	USEPA Compliant?
	10301 Salicylate TNTplus (UHR)	100 - 1800 mg/L NH₃-N	View
	10301 Salicylate TNTplus (UHR)	120 - 2190 mg/L NH₃	View

Nitrogen, Total	Method	Range	Reagent Set(s)	USEPA Compliant?
	10071 Test 'N Tube LR Persulfate Digestion	0.5 - 25.0 mg/L N	View
	10072 Test 'N Tube HR Persulfate Digestion	2 - 150 mg/L N	View
	10208 Spectrophotometer HR TNTplus	5 - 40 mg/L N	View
	10208 Spectrophotometer LR TNTplus	1 - 16 mg/L N	View
	10208 Spectrophotometer UHR TNTplus	20 - 100 mg/L N	View

Nitrogen, Total Inorganic (TIN)	Method	Range	Reagent Set(s)	USEPA Compliant?
	10021 Test 'N Tube™ Titanium Trichloride Reduction	0.2 - 25.0 mg/L N	View

Nonionic surfactants	Method	Range	Reagent Set(s)	USEPA Compliant?
	10275 Nonionic surfactants TNT875	0.2 - 6.0 mg/L TRITON X-100	View
	10275 Nonionic surfactants TNT876	6.0 - 200 mg/L TRITON x 100	View

Oxygen Scavengers	Method	Range	Reagent Set(s)	USEPA Compliant?
	8140 Powder Pillows Iron Reduction	13 - 1500 µg/L Iso-ascorbic Acid (ISA)	View
	8140 Powder Pillows Iron Reduction	15 - 1,000 µg/L Methylethyl Ketoxime (MEKO)	View
	8140 Powder Pillows Iron Reduction	3 - 450 µg/L DEHA	View
	8140 Powder Pillows Iron Reduction	5 - 600 µg/L Carbohydrazide	View
	8140 Powder Pillows Iron Reduction	9 - 1,000 µg/L Hydroquinone-PP	View

Ozone	Method	Range	Reagent Set(s)	USEPA Compliant?
	8311 AccuVac® Indigo	0.01 - 0.25 mg/L O₃ LR	View
	8311 AccuVac® Indigo	0.01 - 0.75 mg/L O₃	View
	8311 AccuVac® Indigo	0.01 - 1.50 mg/L O₃ HR	View

Peracetic Acid (PAA)	Method	Range	Reagent Set(s)	USEPA Compliant?
	DPD 10290	0.10 - 10.0 mg/L as PPA	View

Phenols	Method	Range	Reagent Set(s)	USEPA Compliant?
	8047 4-Aminoantipyrine	0.002 - 0.200 mg/L Phenol	View	Y

Phosphonates	Method	Range	Reagent Set(s)	USEPA Compliant?
	8007 Powder Pillows Persulfate UV Oxidation	0.02 - 2.50 mg/L PO₄^3-	View
	8007 Powder Pillows Persulfate UV Oxidation	0.1 - 2.5 mg/L	View
	8007 Powder Pillows Persulfate UV Oxidation	1.0 - 125 mg/L PO₄^3-	View

Phosphorus	Method	Range	Reagent Set(s)	USEPA Compliant?
	10055 Spectrophotometer Pour-Thru Cell	19 - 3,000 µg/L PO₄	View
	10127 Test 'N Tube Molybdovanadate with Acid Persulfate Digestion	1.0 - 100.0 mg/L PO₄3	View
	10209 Spectrophotometer HR, TNTplus 844	0.5 - 5 mg/L P (1.5-15.0 mg/L PO₄)	View	Y
	10209 Spectrophotometer LR, TNTplus 843	0.05 - 1.5 mg/L P (0.15-4.5 mg/L PO₄)	View	Y
	10209 Spectrophotometer UHR, TNTplus 845	2 - 20 mg/L P (6-60 mg/L PO₄)	View	Y
	10210 Spectrophotometer HR, TNTplus 844	1.5 - 15.0 mg/L PO₄^_3-	View
	10210 Spectrophotometer LR, TNTplus 843	0.15 - 4.50 mg/L PO₄^_3-	View
	10210 Spectrophotometer UHR, TNTplus 845 Ascorbic Acid Method TNTplus™ 843	6 - 60 mg/L PO₄^_3-	View
	10214 Spectrophotometer TNTplus 846	1.6 - 30 mg/L P (5.0 - 90 mg/L PO₄)	View
	8048 Powder Pillows or AccuVac® PhosVer 3, Ascorbic Acid	0.02 - 2.50 mg/L PO₄	View	Y
	8048 TNT™ PhosVer 3	0.06 - 5.00 mg/L PO₄³⁻	View	Y
	8114 Reagent or AccuVac Molybdovanadate	0.3 - 45.0 mg/L PO₄	View
	8114 Spectrophotometer Pour-Thru	0.3 - 45.0 mg/L PO₄	View
	8114 Test 'N Tube HR Molybdovanadate	1.0 - 100.0 mg/L PO₄	View
	8178 Amino Acid Reagent Amino Acid Method	0.23 - 30.00 mg/L PO₄	View
	8180 Test 'N Tube™ PhosVer® 3 with Acid Aydrolysis	0.06 - 3.50 mg/L PO₄^₃	View
	8190 Digestion Test 'N Tube™	0.06 - 3.50 mg/L PO₄3	View	Y

Potassium	Method	Range	Reagent Set(s)	USEPA Compliant?
	8049 colorimetric Powder Pillow-LR-MR-HR For oil and gas field waters	0.1 - 700 mg/L K	View
	8049 Spectrophotometer Powder Pillows	0.1 - 7.0 mg/L K	View

Quaternary Ammonium Compounds	Method	Range	Reagent Set(s)	USEPA Compliant?
	8337 Spectrophotometer Powder Pillows Direct Binary Complex	0.2 - 5.0 mg/L CTAB	View

Selenium	Method	Range	Reagent Set(s)	USEPA Compliant?
	8194 Spectrophotometer Diaminobenzidine	0.01 - 1.00 mg/L Se	View

Silica	Method	Range	Reagent Set(s)	USEPA Compliant?
	8185 Spectrophotometer Powder Pillows HR Silicomolybdate	1 - 100 mg/L SiO₂	View
	8186 Spectrophotometer Powder Pillows Heteropoly Blue	0.010 - 1.600 mg/L SiO₂	View
	8282 Spectrophotometer Pour-Thru Cell Heteropoly Blue	3 - 1,000 µg/L SiO₂	View

Silver	Method	Range	Reagent Set(s)	USEPA Compliant?
	8120 Spectrophotometer Powder Pillows Colorimetric	0.02 - 0.70 mg/L	View

Sulfate	Method	Range	Reagent Set(s)	USEPA Compliant?
	10227 Spectrophotometer HR TNTplus 865	150 - 900 mg/L SO₄	View
	10227 Spectrophotometer LR TNTplus 864 Turbidimetric	40 - 150 mg/L SO₄	View
	10248 Powder Pillows LR-MR-HR SulfaVer 4	2 - 7000 mg/L SO₄ ²-	View
	8051 Powder Pillows or AccuVac® SulfaVer 4	2 - 70 mg/L SO₄^2-	View	Y

Sulfide / Hydrogen Sulfide	Method	Range	Reagent Set(s)	USEPA Compliant?
	10254 Methylene Blue	0.01 - 70 mg/L S²-	View
	10294 Methylene Blue	0.1 - 2.0 mg/L S²-	View
	8131 Spectrophotometer Methylene Blue	5 - 800 µg/L S^2-	View	Y

Sulfite	Method	Range	Reagent Set(s)	USEPA Compliant?
	10308 DTNB	0.10 - 5.00 mg/L SO₃²¯

Suspended Solids	Method	Range	Reagent Set(s)	USEPA Compliant?
	8006 Photometric	5 - 750 mg/L TSS

Tannin and Lignin	Method	Range	Reagent Set(s)	USEPA Compliant?
	8193 Tyrosine	0.1 - 9.0 mg/L as Tannic Acid	View

TKN	Method	Range	Reagent Set(s)	USEPA Compliant?
	10242 Spectrophotometer, s-TKN, TNTplus 880	0 - 16 mg/L N	View
	8075 TKN, Nessler	1 - 150 mg/L TKN	View

Total Organic Carbon (TOC)	Method	Range	Reagent Set(s)	USEPA Compliant?
	10128 HR, Spectrophotometer Test 'N Tube Direct	100 - 700 mg/L C	View
	10129 LR, Test 'N Tube Direct	0.3 - 20.0 mg/L C	View
	10173 MR, Test 'N Tube Direct	15 - 150 mg/L C	View

Toxicity	Method	Range	Reagent Set(s)	USEPA Compliant?
	10017 ToxTrak	0 - 100 % Inhibition	View

Trihalomethanes, Total (THM)	Method	Range	Reagent Set(s)	USEPA Compliant?
	10132 THM Plus	10 - 600 µg/L CHCl₃	View

Volatile Acids	Method	Range	Reagent Set(s)	USEPA Compliant?
	10240 TNTplus	50 - 2,500 mg/L Acetic	View
	8196 Reagent Solution Esterification	27 - 2800 mg/L as Acetic Acid	View

Zinc	Method	Range	Reagent Set(s)	USEPA Compliant?
	8009 Powder Pillows Zincon	0.01 - 2.00 mg/L Zn	View	Y
	8009 Powder Pillows Zincon	0.01 - 3.00 mg/L Zn	View	Y