| Simplified Spectrophotometric Measurement of Total Kjeldahl Nitrogen in Water and Wastewater | Organic Nitrogen by Electrode (Calculated) |
| ICP - metals | Organic Nitrogen by Electrode (Calculated) |
| ICP - metals | Ammonia by Phenate Method |
| ICP - metals | Nitrate Nitrogen by Automated Cadmium Reduction |
| Determination of Inorganic Anions by Ion Chromatography | Organic Nitrogen by Macro Kjeldahl Method |
| Determination of Inorganic Anions by Ion Chromatography | Organic Nitrogen by Macro Kjeldahl Method |
| Determination of Inorganic Anions in Drinking Water by Ion Chromatography | Organic Nitrogen by Macro Kjeldahl Method |
| Determination of Inorganic Anions in Drinking Water by Ion Chromatography | Organic Nitrogen by Macro Kjeldahl Method |
| Total Kjeldahl Nitrogen - Automated Phenate | Organic Nitrogen by Macro Kjeldahl Method |
| Total Kjeldahl Nitrogen - Automated Phenate | Organic Nitrogen by Macro Kjeldahl Method |
| Total Kjeldahl Nitrogen - Block Digest, Phenate | Nitrogen (Organic) by Semi-micro Kjeldahl Method |
| Total Kjeldahl Nitrogen - Block Digest, Phenate | Nitrogen (Organic) by Semi-micro Kjeldahl Method |
| Total Kjeldahl Nitrogen - Block Digest, Phenate | Organic Nitrogen by Semi-Micro-Kjeldahl Method |
| Total Kjeldahl Nitrogen - Titrimetric | Nitrogen |
| Total Kjeldahl Nitrogen - Titrimetric | Nitrogen (Organic) by Semi-Micro-Kjeldahl Method |
| Kjeldahl Nitrogen - Ion Selective Electrode | Organic Nitrogen by Block Digestion and Flow Injection Analysis |
| Kjeldahl Nitrogen - Ion Selective Electrode | Organic Nitrogen by Block Digestion and Flow Injection Analysis |
| Phosphorous - Colorimetric, Automated persulfate | Organic Nitrogen by Block Digestion and Flow Injection Analysis |
| Phosphorous - Colorimetric, Automated persulfate | Organic Nitrogen by Block Digestion and Flow Injection Analysis |
| Phosphorous - Colorimetric, Automated persulfate | Organic Nitrogen by Block Digestion and Flow Injection Analysis |
| Phosphorous - Colorimetric, single reagent | Phosphorus by Sample Preparation |
| Phosphorous - Colorimetric, single reagent | Phosphorus by Persulfate Digestion Method |
| Phosphorous - Colorimetric, two reagent. | Phosphorus by Persulfate Digestion Method |
| Phosphorous - Colorimetric, two reagent. | Phosphorus by Persulfate Digestion Method |
| Phosphorous - Colorimetric, automated block. | Phosphorus by Persulfate Digestion Method |
| Phosphorous - Colorimetric, automated block. | Phosphorus by Sample Preparation |
| Total Kjeldahl Nitrogen in Water and Biosolids by Automated Colorimetry with Preliminary Distillation/Digestion | Phosphorus by Ascorbic Acid Method |
| Total Kjeldahl Nitrogen in Water and Biosolids by Automated Colorimetry with Preliminary Semi-automatic Digestion | Phosphorus by Ascorbic Acid Method |
| Inductively Couples Plasma Atomic Emission Spectrometric Method for Trace Element Analysis of Water and Wastes | Phosphorus by Ascorbic Acid Method |
| Organic Nitrogen by Automated Phenate (Calculated) | Phosphorus by Ascorbic Acid Method |
| Organic Nitrogen by Automated Phenate (Calculated) | Phosphorus - Ascorbic Acid Method |
| Organic Nitrogen by Nesslerization or Titration (Calculated) | Phosphorus by Ascorbic Acid Method |
| Organic Nitrogen by Electrode (Calculated) | Phosphorus by Ascorbic Acid Method |
| ICP - metals | Phosphorus by Ascorbic Acid Method |
| ICP - metals | Phosphorus by Automated Ascorbic Acid Reduction |
| Determination of Inorganic Anions by Ion Chromatography | Phosphorus by Automated Ascorbic Acid Reduction |
| Determination of Inorganic Anions in Drinking Water by Ion Chromatography | Phosphorus by Automated Ascorbic Acid Reduction Method |
| Total Kjeldahl Nitrogen - Automated Phenate | Phosphorus by Automated Ascorbic Acid Reduction Method |
| Total Kjeldahl Nitrogen - Titrimetric | Phosphorus by Automated Ascorbic Acid Reduction Method |
| Phosphorous - Colorimetric, Automated persulfate | Total Phosphorus by Manual Digestion and Flow Injection Analysis |
| Organic Nitrogen by Macro Kjeldahl Method | Total Phosphorus by Manual Digestion and Flow Injection Analysis |
| Nitrogen (Organic) by Semi-micro Kjeldahl Method | Total Phosphorus by Manual Digestion and Flow Injection Analysis |
| Phosphorus by Persulfate Digestion Method | Total Phosphorus by Manual Digestion and Flow Injection Analysis |
| Phosphorus by Ascorbic Acid Method | Phosphorus by Stannous Chloride Method |
| Phosphorus by Automated Ascorbic Acid Method | Total Kjeldahl Nitrogen in Water |
| Organic Nitrogen by Electrode (Calculated) | Ammonia Nitrogen by Nessler |
| Organic Nitrogen by Electrode (Calculated) | PhosVer3 Acid Persulfate Digestion |
| Organic Nitrogen by Electrode (Calculated) | Ammonia Nitrogen by Salycilate Method |
| Organic Nitrogen by Electrode (Calculated) | Ammonia Nitrogen by Salycilate Method |
| Ammonia Nitrogen by Titration | Total Phosphorus by Ascorbic Acid Method w/ TNTplus 843, 844, 845 |
| Ammonia Nitrogen by Titration | Total Phosphorus by Ascorbic Acid Method with TNTplus 843, 844, 845 |
| Ammonia Nitrogen by Selective Ion Probe | Nitrogen, Simplified TKN (s-TKN) |
| Ammonia Nitrogen by Selective Ion Probe | Nitrogen, Simplified TKN (s-TKN) |