Keep the named phenols method ready for the next water sample
Choose HI96788-25 when you need a matched, pre-dosed phenols reagent set rather than a single replacement component. The 25-test format supports routine water-quality and treatment checks with less reagent preparation, while lot and expiry labeling supports traceability.
Official reagent-set photograph; identify supplied components by their lot labels, not pictured quantities or dates.
Match the phenols method—not just the vial format
Use the documented Phenols method on HI83314 or HI83399 for 0.00–5.00 mg/L phenols, using the 510 nm 4-aminoantipyrine color reaction. The set is intended for drinking water, wastewater, process water and natural waters within the method’s matrix limits.
One set, 25 nominal determinations
One order supplies the HI96788-25 reagent set for 25 tests. Each determination uses a HI96788V-0 Phenol Reagent Vial, one HI96788A-0 packet and one HI96788B-0 packet. Quality-control checks and repeats also consume reagents; 25 tests does not mean 25 independently validated sample results. Per-test doses are not a claim about retail component counts or vial fill volumes.
Have the measurement workflow ready
Use your compatible photometer with the adapter specified in its current Phenols method, accurate 5 mL sample delivery, clean lint-free wipes and appropriate PPE. Meter, adapter, pipette and reference standards are separate from this reagent refill. Do not add a digestion reactor simply because the reagent is supplied in vials; the cited phenols color-development procedure has no heated digestion step.
A practical preparation overview
The method zeroes the sample-containing reagent vial before adding reagents A and B, then measures after color development. Keep sample temperature between 10 and 35 °C and allow the prescribed five-minute reaction time. Follow the exact-model manual for the complete sequence, vial handling and timing rather than using this overview as a bench recipe.
Read phenols results on the right basis
HI83399 reports mg/L of phenols as C6H5OH, with phenol as the standard. Different phenolic compounds produce different color responses; Hanna describes the measurement as the minimum reported concentration of phenols. This is not equal-response quantification of every phenolic compound, chemical speciation or a direct toxicity measurement.
Choose preparation and quality control for your matrix
Sample zeroing helps address background, but it does not make every matrix interference-free. High turbidity requires distillation in the current method; oxidizing/reducing agents and listed ions can also interfere. Hanna’s ISO 6439 / EPA 420.1 compliance statement is qualified after distillation, not a guarantee that an untreated sample or every reporting use is accepted. Use appropriate phenol reference material and laboratory QC separately; instrument check standards do not replace analytical QC.
Store and handle by the supplied lot
Keep unused vials in their packaging in a cool, dark place and use the expiry and storage directions on the supplied lot. Read all three component SDS before handling and follow their PPE and waste-disposal guidance. The manufacturer classifies this product as Dangerous Goods; destination and carrier eligibility require confirmation, not an assumed dispatch promise.
Frequently Asked Questions
Why choose the complete HI96788-25 set rather than one component?
The set is the orderable 25-test refill named in the HI83314 and HI83399 Phenols methods. A determination needs the reagent vial plus both reagents A and B. A component SDS or a bottle bearing a related code does not establish a complete assay refill.
How many assays can I plan from one order?
Hanna states 25 tests. Plan reagent use for your samples plus blanks, controls and repeats required by your laboratory method. The stated capacity is not a promise of 25 reportable unknowns, and per-test doses are not used here to infer physical packet counts or total liquid volume.
Which instrument and vial setup should I use?
HI83314 and HI83399 current manuals explicitly list HI96788-25 for their Phenols method and specify the model’s vial-adapter setup. Hanna markets the set as 13 mm internal-diameter vials; the current instrument procedure is labeled Phenols (16 mm Vial). Follow that exact model procedure and adapter instructions rather than treating diameter labels as an adapter alias or universal photometer compatibility.
What range and chemistry does this reagent measure?
The corroborated phenols method is 0.00–5.00 mg/L, with 0.01 mg/L resolution and a 510 nm 4-aminoantipyrine reaction. The HI83314 and HI83399 method accuracy is ±0.05 mg/L ±3% of reading at 25 °C. This is phenols chemistry, not a nitrite reagent or a nitrogen-reporting range.
Does a result represent every phenolic compound equally?
No. Different phenolic compounds yield varying color responses. Phenol is the reference standard, and HI83399 displays mg/L phenols as C6H5OH. Hanna describes the result as the minimum reported phenols concentration; do not present it as full phenolic speciation, an equal-response sum of all phenols or a toxicity result.
Does the method require a reactor or distillation?
The cited color-development procedure does not require a digestion reactor. Distillation is a separate sample-preparation requirement for high turbidity and may be used to remove other interferences. Hanna’s stated ISO 6439 / EPA 420.1 compliance is after distillation. A vial format alone does not imply COD digestion.
What else do I need, including standards?
Have the supported meter, its method-specified vial adapter, accurate 5 mL sample delivery, wipes and SDS-directed PPE. These are not represented as included in the refill. Provide appropriate phenol reference material and the blanks/controls required by your laboratory; CAL Check instrument verification material is not an analytical phenol standard. Check the method’s interference limits against your sample matrix.
Which handling and timing details protect the result?
Use samples at 10–35 °C, keep vial exteriors clean, zero as directed and observe the five-minute color-development period. Store unused vials in their packaging in a cool, dark place and follow the supplied lot expiry. Read the HI96788V-0, HI96788A-0 and HI96788B-0 SDS and the full method for safe handling, waste management and matrix preparation.
