Replenish the red-wine preparation step—not the whole sugar assay
Remove phenol interference before HI83746 Fehling reducing-sugar measurements with the dedicated 10 g activated-charcoal refill. It is a red-wine decolorization consumable, not a complete reducing-sugars test kit.
Manufacturer identification photo; labels do not establish current packing, stock lot or expiry.
Choose the right role, range and method
Red-wine sample pretreatment for the HI83746 method; not an analytical measurement by itself.
Choose this refill when your red-wine workflow needs more charcoal. The HI83746 starter package may already supply charcoal and filters; check what you own before ordering. Do not add charcoal universally to white-wine samples: follow the matrix-specific instrument procedure.
What one order supplies
One bottle of HI93703-59 activated charcoal, 10 g. The HI83746 manual lists about 100 red-wine decolorizations; that is a nominal preparation capacity, not 100 complete Fehling assays. No spoon, filter, funnel, pipette or reactor inclusion is promised for this replacement bottle. The supplied mass does not establish a per-preparation mass.
Have the rest of the workflow ready
For red-wine pretreatment, have the correct spoon, filter discs, funnel and clean cuvettes. To measure reducing sugars afterwards, you also need the HI83746 photometer, separate HI83746-20 Fehling A/B assay reagents, accurate pipettes, deionized water and the HI839800 reactor with suitable vial handling/cooling equipment. Check existing starter supplies rather than repurchasing everything.
A short preparation step with a separate heated assay
The HI83746 manual treats 10 mL red wine with two spoons of charcoal, swirls for two minutes, waits three minutes and filters into a clean cuvette. This charcoal step is not heated. The subsequent Fehling A/B assay—not charcoal treatment—uses a 105 °C reactor for exactly seven minutes, followed by the prescribed cooling steps. Do not substitute an oven or microwave.
Understand the result you are preparing for
HI83746 reports a reducing-sugars index in g/L, over its documented 0.00–50.00 g/L range. Fehling response includes different reducing sugars and is not a glucose-only or fermentable-residual-sugar specification. Charcoal removes an interference; it does not itself quantify sugar.
Handle the actual supplied lot
The component SDS identifies HI93703-59-0, while the commercial replacement SKU is HI93703-59. Read that SDS and the bottle label for PPE, storage and disposal. Manufacturer photos may show historical labels or dates; they are not a promise of the stock lot or its expiry.
Frequently Asked Questions
Is this a complete reducing-sugars test kit?
No. It is the activated-charcoal pretreatment refill for red wine. HI83746-20 Fehling A/B reagents and the HI83746 instrument are separate. Charcoal does not produce the final reducing-sugars reading on its own.
Does 10 g mean 100 complete assays?
No. The HI83746 manual lists about 100 red-wine decolorizations for HI93703-59. This is a nominal pretreatment capacity only. Complete assay capacity is determined by the separate Fehling reagents and the required blank/sample workflow.
What is included with the replacement bottle?
One 10 g bottle of activated charcoal. The photo is an identification illustration, not a packing list. A spoon, filter discs, funnel, cuvettes, pipettes, instrument and reactor are not represented as included.
Might I already have charcoal in my HI83746 starter package?
Yes. The HI83746 manual supplied-with list includes charcoal and filters. Check your original package and remaining supplies; this replacement bottle replenishes the charcoal step without buying another instrument package.
How is red wine decolorized?
The exact HI83746 procedure uses 10 mL red wine and two spoons of charcoal. Swirl for two minutes, wait three minutes, then filter through the prescribed folded filter disc and funnel into a clean cuvette. Do not convert the spoon dose to grams using the bottle mass or nominal capacity.
Does charcoal treatment require a heater?
No. Heating belongs to the separate Fehling A/B assay after preparation. That assay requires the HI839800 reactor at 105 °C for exactly seven minutes and prescribed cooling. Charcoal is not a heated-treatment reagent, and an oven or microwave is not an approved reactor substitute.
Should every white wine also be treated with charcoal?
Do not assume so. The cited preparation is specifically for red wine to remove phenol interference. Follow your matrix-specific HI83746 method instead of making charcoal a universal white-wine pretreatment.
Which safety sheet and result limitations apply?
Use the HI93703-59-0 component SDS for this commercial HI93703-59 refill and follow the supplied lot label. The following HI83746 assay reports a reducing-sugars index, not glucose alone or a guaranteed fermentable-sugar concentration. Read the separate Fehling reagent SDS as well before running that assay.
