| Total Kjeldahl Nitrogen - Automated Phenate | Organic Nitrogen by Electrode (Calculated) |
| Total Kjeldahl Nitrogen - Automated Phenate | Organic Nitrogen by Electrode (Calculated) |
| Total Kjeldahl Nitrogen - Block Digest, Phenate | Organic Nitrogen by Electrode (Calculated) |
| Total Kjeldahl Nitrogen - Block Digest, Phenate | Organic Nitrogen by Electrode (Calculated) |
| Total Kjeldahl Nitrogen - Block Digest, Phenate | Organic Nitrogen by Macro Kjeldahl Method |
| Total Kjeldahl Nitrogen - Titrimetric | Organic Nitrogen by Macro Kjeldahl Method |
| Total Kjeldahl Nitrogen - Titrimetric | Organic Nitrogen by Macro Kjeldahl Method |
| Kjeldahl Nitrogen - Ion Selective Electrode | Nitrogen (Organic) by Semi-micro Kjeldahl Method |
| Kjeldahl Nitrogen - Ion Selective Electrode | Nitrogen (Organic) by Semi-micro Kjeldahl Method |
| Phosphorous - Colorimetric, Automated persulfate | Organic Nitrogen by Semi-Micro-Kjeldahl Method |
| Phosphorous - Colorimetric, Automated persulfate | Nitrogen (Organic) by Semi-Micro-Kjeldahl Method |
| Phosphorous - Colorimetric, Automated persulfate | Phosphorus by Persulfate Digestion Method |
| Phosphorous - Colorimetric, single reagent | Phosphorus by Sample Preparation |
| Phosphorous - Colorimetric, single reagent | Phosphorus by Persulfate Digestion Method |
| Phosphorous - Colorimetric, two reagent. | Phosphorus by Sample Preparation |
| Phosphorous - Colorimetric, two reagent. | Phosphorus by Ascorbic Acid Method |
| Phosphorous - Colorimetric, automated block. | Phosphorus by Ascorbic Acid Method |
| Phosphorous - Colorimetric, automated block. | Phosphorus by Ascorbic Acid Method |
| Total Kjeldahl Nitrogen in Water and Biosolids by Automated Colorimetry with Preliminary Distillation/Digestion | Phosphorus by Ascorbic Acid Method |
| Total Kjeldahl Nitrogen - Automated Phenate | Phosphorus by Automated Ascorbic Acid Reduction |
| Total Kjeldahl Nitrogen - Titrimetric | Phosphorus by Automated Ascorbic Acid Reduction |
| Phosphorous - Colorimetric, Automated persulfate | Phosphorus by Automated Ascorbic Acid Reduction Method |
| Organic Nitrogen by Macro Kjeldahl Method | Phosphorus by Automated Ascorbic Acid Reduction Method |
| Nitrogen (Organic) by Semi-micro Kjeldahl Method | Organic Nitrogen by Automated Phenate (Calculated) |
| Phosphorus by Persulfate Digestion Method | Organic Nitrogen by Automated Phenate (Calculated) |
| Phosphorus by Ascorbic Acid Method | Organic Nitrogen by Nesslerization or Titration (Calculated) |
| Phosphorus by Automated Ascorbic Acid Method | Phosphorus by Stannous Chloride Method |
| Organic Nitrogen by Electrode (Calculated) | Ammonia Nitrogen by Selective Ion Probe |
| Organic Nitrogen by Electrode (Calculated) | |