LW Scientific URS-01PR-KE77 Ketone Urine Reagent Strips | 100/Vial

The LW Scientific URS-01PR-KE77 is a single-parameter ketone urine reagent test strip that screens for the presence of ketone bodies — acetoacetic acid and acetone — in urine, delivering a colorimetric result in 60 seconds. Manufactured by LW Scientific, Inc., an ISO 13485-certified laboratory equipment company, the ketone reagent pad uses the sodium nitroprusside reaction (Legal's test) in an alkaline medium to produce a violet color proportional to ketone concentration — the established gold-standard chemistry for urine ketone detection. Each sealed vial contains 100 individual single-use reagent strips suitable for both clinical urinalysis and ketogenic diet monitoring applications.

Features & Benefits

• Sodium nitroprusside chemistry (Legal's test) — gold-standard urine ketone detection reagent; acetoacetic acid reacts more sensitively than acetone (detection thresholds: 10 mg/dL acetoacetic acid, 50 mg/dL acetone)
• Dual-use application — appropriate for clinical DKA and ketonuria assessment as well as low-carb and ketogenic diet adherence monitoring; LW Scientific specifically endorses keto diet use for this strip
• 60-second visual read — simple violet color comparison to on-vial chart; deeper violet indicates higher ketone concentration
• 100 strips per vial — generous supply for extended daily monitoring programs or multi-patient clinical workflows
• ISO 13485-certified manufacturer — produced under a rigorous certified IVD quality management system

Specifications

Intended Use & Applications

• Clinical ketonuria screening — detection of ketonuria in diabetic patients, fasting patients, and patients with suspected metabolic disorders
• Diabetic ketoacidosis (DKA) triage — urine ketone strips are a first-line screening tool in DKA assessment; positive results should be confirmed with serum or blood ketone measurement
• Ketogenic and low-carb diet monitoring — LW Scientific endorses the URS-01PR-KE77 for low-carb dieters monitoring urinary ketone output as an indicator of dietary ketosis; 100 strips per vial supports weeks of daily monitoring
• Pregnancy ketonuria screening — hyperemesis gravidarum and inadequate caloric intake can cause clinically significant ketonuria
• Starvation and malnutrition assessment — ketonuria indicates active fat catabolism from caloric deprivation
• Pre-surgical fasting confirmation

Usage Instructions

1. Collect a fresh urine specimen in a clean, dry container. For keto diet monitoring, first morning urine typically provides the most concentrated ketone readings.
2. Remove one strip from the vial. Replace the cap immediately to protect remaining strips from moisture and light.
3. Briefly dip the reagent pad fully in urine, then remove immediately.
4. Run the strip edge against the container rim. Hold horizontally.
5. Read the pad color against the on-vial chart at 60 seconds. A violet or purple color indicates ketone presence; deeper violet corresponds to higher concentration.

Volume Discounts

LabSupplies.com offers below retail pricing on multi-vial orders of LW Scientific URS-01PR-KE77 ketone strips for clinical practices, wellness programs, nutrition coaches, and institutional buyers. Contact us for volume pricing.

Frequently Asked Questions

Why does the strip detect acetoacetic acid more sensitively than acetone?

The sodium nitroprusside chemistry reacts preferentially with acetoacetic acid (detection threshold: 10 mg/dL) over acetone (50 mg/dL). Beta-hydroxybutyrate — the predominant ketone body in deep ketosis and advanced DKA — is NOT detected by this method. For monitoring deep ketosis or confirming DKA, a blood beta-hydroxybutyrate meter provides a more complete picture alongside urine strip screening.

Can keto diet followers use these strips reliably?

Yes — with important context. LW Scientific specifically endorses the URS-01PR-KE77 for low-carb and ketogenic dieters monitoring ketone output in urine. These are an economical way to confirm dietary ketosis, especially in the early weeks of a ketogenic diet. Note that as the body adapts to ketosis over weeks to months, urine ketone excretion naturally decreases as tissues use ketones more efficiently — a trace or negative urine result does not necessarily indicate failed ketosis in adapted individuals.

What can cause false-positive results?

Residual peroxide-containing cleaning agents left in the collection container can produce false-positive reactions with the nitroprusside reagent. Certain medications including mesna and other thiol-containing compounds may also react. Replace caps immediately and do not use formaldehyde as a urine preservative.

When would I upgrade to the 10-parameter strip instead?

If ketone screening in a clinical context raises concern for DKA or underlying metabolic disease, a complete urinalysis is clinically indicated. The LW Scientific URS-10PR-7777 10-parameter strip tests ketone alongside glucose, pH, protein, blood, and five additional analytes in a single 60-second dip.