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