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NITRATE
ZINC REDUCTION · CODE 3689-SC
QUANTITY CONTENTS CODE
50 *Nitrate Spectrophotometric Grade Tablets *3881A-H
1 Tablet Crusher 0175
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents go
to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or
fax.
Nitrogen is essential for plant growth, but excessive amounts in water supplies can
result in nutrient pollution. Nitrates, in conjunction with phosphate, stimulate the
growth of algae creating water quality problems. Nitrogen compounds may enter
water as nitrates or be converted to nitrates from agricultural fertilizers, sewage,
industrial and packing house wastes, drainage from livestock feeding areas
and manure. Nitrates in large amounts in drinking water can cause “blue baby
syndrome” (methemoglobenemia) in infants in less than 6 months of age and other
health problems. US Public Health Service Drinking Water Standards state that
44 ppm nitrate should not be exceeded. To the sanitary and industrial engineer,
concentrations of less than 4 ppm are acceptable.
APPLICATION: Drinking, surface, and saline waters; domestic and
industrial waters.
RANGE: 0–60 ppm Nitrate
MDL: 5 ppm
METHOD: Zinc is used to reduce nitrate to nitrite. The nitrite
that was originally present, plus the reduced nitrate,
reacts with chromotropic acid to form a red color in
proportion to the amount of nitrite in the sample.
SAMPLE HANDLING &
PRESERVATION:
Analysis should be made as soon as possible. If
analysis cannot be made within 24 hours, the sample
should be refrigerated at 4°C. When samples must
be stored for more than 24 hours, add 2 mL of
concentrated sulfuric acid per liter of sample. For best
results, the analysis for nitrate should be determined
at temperatures between 20°C and 25°C.
INTERFERENCES: Nitrite interferes at all concentrations. Strong oxidizing
and reducing substances interfere. Low results
might be obtained for samples that contain high
concentrations of copper and iron.
SMART3 Test Procedures 2.11 NITRATE, Tablet
Test Procedures
- CONTENTS 3
- GENERAL INFORMATION 5
- LIMITS OF LIABILITY 6
- WARRANTY 6
- REGISTER YOUR METER 6
- SPECIFICATIONS 7
- 6 SMART3 Colorimeter 11.10 8
- CONTENTS AND ACCESSORIES 9
- ACCESSORIES 9
- EPA COMPLIANCE 10
- CE COMPLIANCE 10
- IP67 CERTIFICATION 10
- CHEMICAL TESTING 11
- Sampling of Closed System 12
- FILTRATION 12
- SMART3 Colorimeter 11.10 11 13
- REAGENT BLANK 14
- METER CARE 14
- CALIBRATION 15
- CALIBRATION CURVES 15
- 14 SMART3 Colorimeter 11.10 16
- SMART3 Colorimeter 11.10 15 17
- STANDARD ADDITIONS 18
- MEASUREMENTS 19
- INTERFERENCES 20
- STRAY LIGHT INTERFERENCE 20
- OPERATION OF THE 21
- SMART3 COLORIMETER 21
- COMPONENTS 22
- GENERAL OPERATING PROCEDURES 23
- 22 SMART3 Colorimeter 11.10 24
- Result or 25
- LOOPING MENUS 26
- TESTING MENU 27
- TEST SEQUENCES 28
- GENERAL TESTING PROCEDURES 28
- 1.00 ppm 30
- SMART3 Colorimeter 11.10 29 31
- 0.28 ppm 32
- 0.30 ppm 33
- 32 SMART3 Colorimeter 11.10 34
- SMART3 Colorimeter 11.10 35 37
- EDITING MENU 38
- SMART3 Colorimeter 11.10 37 39
- Editing/Set Up 39
- ADDING OR DELETING A TEST 40
- ADDING A TEST 40
- DELETING A TEST 42
- SMART3 Colorimeter 11.10 41 43
- EDIT USER TESTS 44
- U V W X 46
- H I J K 46
- S T U V 47
- 2 3 4 5 47
- E P Q R 47
- O P Q R 47
- 46 SMART3 Colorimeter 11.10 48
- 0 1 2 3 50
- 1 1 2 3 50
- . – 0 1 51
- SMART3 Colorimeter 11.10 51 53
- 52 SMART3 Colorimeter 11.10 54
- – 1 2 3 55
- O 1 2 3 55
- . – 0 1 55
- SETTING THE CLOCK 59
- LOGGING DATA 60
- FACTORY SETUP 61
- SETTING POWER SAVE 61
- 60 SMART3 Colorimeter 11.10 62
- SETTING THE BACKLIGHT TIME 63
- SELECTING A LANGUAGE 64
- SMART3 Colorimeter 11.10 63 65
- COMPUTER CONNECTION 66
- BATTERY/AC OPERATION 67
- MAINTENANCE 68
- TROUBLESHOOTING 69
- TROUBLESHOOTING GUIDE 70
- 1910-TEST 71
- 02.13.12 71
- REAGENT SYSTEMS 73
- ALKALINITY–UDV 77
- ALUMINUM 79
- AMMONIA NITROGEN - LOW RANGE 81
- PROCEDURE - FRESH WATER 82
- PROCEDURE - SALT WATER 82
- AMMONIA NITROGEN - HIGH RANGE 84
- BENZOTRIAZOLE/TOLYLTRIAZOLE 89
- BENZOTRIAZOLE PROCEDURE 91
- TOLYLTRIAZOLE PROCEDURE 92
- BIGUANIDE 93
- BORATE - UDV 95
- PROCEDURE 100
- Test Procedures 101
- PROCEDURE A: 102
- BROMINE (NO CHLORINE) 102
- PROCEDURE B: 102
- PROCEDURE C: 103
- BROMINE - UDV 105
- PAN METHOD • CODE 4017-01 109
- CHLORIDE 111
- CHLORINE 113
- PROCEDURE–FREE CHLORINE 115
- PROCEDURE–TOTAL CHLORINE 115
- PROCEDURE–COMBINED CHLORINE 119
- CHLORINE, FREE - UDV 121
- CHLORINE, TOTAL - UDV 125
- CHLORINE DIOXIDE 129
- CHROMIUM, HEXAVALENT 131
- CHROMIUM - HEXAVALENT 133
- TRIVALENT & TOTAL 133
- HEXAVALENT CHROMIUM PROCEDURE 135
- TRIVALENT CHROMIUM PROCEDURE 136
- PAN METHOD · CODE 4851 137
- COD – LOW RANGE 139
- COD – STANDARD RANGE 143
- COD – HIGH RANGE 147
- PLATINUM COBALT METHOD 151
- NO REAGENTS REQUIRED 151
- COPPER – LOW RANGE 153
- CUPRIZONE METHOD • CODE 4023 155
- COPPER – UDV 159
- CODE 3660-01-SC 163
- CYANURIC ACID 167
- CYANURIC ACID – UDV 169
- DISSOLVED OXYGEN 173
- FLUORIDE 177
- HARDNESS, TOTAL – UDV 181
- HYDRAZINE 183
- HYDROGEN PEROXIDE – LOW RANGE 185
- DPD METHOD • CODE 4045-01 187
- HYDROGEN PEROXIDE – SHOCK 189
- IRON – UDV 195
- PAR METHOD · CODE 4031 201
- MANGANESE – LOW RANGE 203
- MANGANESE – HIGH RANGE 205
- TMK METHOD · CODE 4861 207
- PREPARATION OF *TMK INDICATOR 208
- MOLYBDENUM – HIGH RANGE 209
- NITRATE - UDV 215
- NITRATE-NITROGEN – LOW RANGE 219
- NITRITE-NITROGEN – LOW RANGE 223
- NITROGEN, TOTAL 225
- OXYGEN SCAVENGERS 229
- DEHA PROCEDURE 231
- CARBOHYDRAZIDE PROCEDURE 232
- ERYTHORBIC ACID PROCEDURE 233
- HYDROQUINONE PROCEDURE 234
- METHYLETHYLKETOXIME PROCEDURE 235
- DPD METHOD • CODE 4881 237
- PROCEDURE - OZONE ONLY 238
- INDIGO METHOD • CODE 3651-SC 241
- PROCEDURE–LOW RANGE 242
- PROCEDURE–HIGH RANGE 243
- PHOSPHATE – LOW RANGE 251
- PHOSPHATE – HIGH RANGE 255
- PHOSPHATE ppb 257
- PHOSPHORUS, TOTAL - LOW RANGE 261
- DIGESTION • CODE 4025-01 265
- POTASSIUM 269
- SILICA – LOW RANGE 271
- SILICA – HIGH RANGE 275
- SULFATE – HIGH RANGE 277
- SULFIDE – LOW RANGE 279
- SURFACTANTS 283
- CODE 3666-01-SC 285
- TURBIDITY 287
- ZINC – LOW RANGE 289
- APPENDIX 292
- Appendix 293
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