Analysis Lab

Enter measurements: code does the math and AI explains the result. Researchers make the call.

1Conditions
2Measurements
3Results
✦AI interpretation

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VIRTUAL

ZnO reference run · EX-001

Virtual data for demonstration only. These are not real measurements.

Conditions

Catalyst

ZnO 1 g/L

Initial conc.

MO 10 mg/L

Light

UV-A 365 nm

pH (before → after)

6.5 → 6.8

Dark equilibrium

30 min

Calibration

R² 0.998

Series

SER-001

Measurements · 464 nm

t (min)	Absorbance A	C (mg/L)	ln(C₀/C)
0	0.692	9.20	0.000
15	0.513	6.81	0.300
30	0.381	5.05	0.599
60	0.210	2.77	1.199
90	Missing · sample_lost (excluded from calculation)
120	0.065	0.84	2.394

C is converted with the calibration A = 0.075 C + 0.002.

Methyl orange concentration over time

Rate constant k

0.020min⁻¹

From 5 points

Removal at 120 min

90.9%

First-order fit R²

1.00

Dark adsorption

8.0%

✦ Interpretation assistant

AI demo · sample response

Over 120 min, methyl orange fell from 9.20 to 0.84 mg/L (90.9% removal).
Adsorption in the dark removed 8.0% before irradiation; this is separated from the photoreaction.
The pseudo-first-order model fits well (k = 0.020 min⁻¹, R² 1.00).
In the same series, the dark control fell 5.4% and the photolysis control 11.9%, so most of the decrease appears to come from ZnO photocatalysis.
However, a drop in absorbance alone does not prove complete degradation or detoxification.

Evidence: EX-001, 5 valid measurements · series SER-001 · protocol v1.0 §6 calculations

✦ Data quality check

AI demo · rule-based check

NoteThe 90 min value is empty. The recorded reason "sample_lost" excludes it from calculation.
NotepH changed from 6.5 to 6.8. Outside methyl orange's color-change range (3.1–4.4), so the effect on absorbance is small.
PassAll absorbances are within the calibration range (0–12 mg/L).

Controls · SER-001

Condition	ZnO	Light	Decrease at 120 min	Shows
Main run · EX-001	Yes	Yes	90.9%	Total removal
Dark · EX-002	Yes	No	5.4%	Adsorption
Photolysis · EX-003	No	Yes	11.9%	Light-only decay

How it is calculated

Removal = (C₀ − Cₜ) / C₀ × 100 · Adsorption = (C_initial − C₀) / C_initial × 100 · ln(C₀/Cₜ) = k·t fitted through the origin (k = Σt·y / Σt²). k is not reported with fewer than 4 points or R² < 0.9.