Description
For positive sampleMass, nonnegative crucibleMass, crucibleAshMass>=crucibleMass, and moistureFraction in [0,1), return ashMass=crucibleAshMass-crucibleMass, asReceivedFraction=ashMass/sampleMass, and dryFraction=ashMass/(sampleMass*(1-moistureFraction)).
Botanical laboratory records distinguish wet mass, dry matter, carriers, extract mass, and assay response. A fraction or reference comparison depends on the chosen material basis and supplied analytical method. Voucher and monograph metadata help identify records but do not themselves authenticate a specimen or establish product quality.
For positive sampleMass, nonnegative crucibleMass, crucibleAshMass>=crucibleMass, and moistureFraction in [0,1), return ashMass=crucibleAshMass-crucibleMass, asReceivedFraction=ashMass/sampleMass, and dryFraction=ashMass/(sampleMass*(1-moistureFraction)).
When to use this tool
Use Pharmacognosy Ash Value Tare Factor when you need this mass-basis, assay-response, extraction, or source-record calculation for supplied laboratory data.
How to use the tool and how it works
- Enter crucibleMass, crucibleAshMass, sampleMass, moistureFraction. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read ashMass, asReceivedFraction, dryFraction. Use the output convention below.
For positive sampleMass, nonnegative crucibleMass, crucibleAshMass>=crucibleMass, and moistureFraction in [0,1), return ashMass=crucibleAshMass-crucibleMass, asReceivedFraction=ashMass/sampleMass, and dryFraction=ashMass/(sampleMass*(1-moistureFraction)).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| crucibleMass | Crucible Mass | Required. Finite number; minimum 0. |
| crucibleAshMass | Crucible Ash Mass | Required. Finite number. |
| sampleMass | Positive sample mass in the common mass unit. | Required. Finite number; strictly above 0. |
| moistureFraction | Wet-basis water mass fraction; 0.1 means ten percent. | Required. Finite number; minimum 0; strictly below 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| ashMass | Ash Mass | Required. Finite number. |
| asReceivedFraction | As Received Fraction | Required. Finite number. |
| dryFraction | Dry Fraction | Required. Finite number. |
{
"input": {
"crucibleMass": 20,
"crucibleAshMass": 20.1,
"sampleMass": 5,
"moistureFraction": 0.2
},
"output": {
"ashMass": 0.10000000000000142,
"asReceivedFraction": 0.020000000000000285,
"dryFraction": 0.025000000000000355
}
}Limitations and assumptions
- Masses need one unit and moisture is a wet-basis fraction. Ash is not capped by sample mass; combustion protocol, contamination, product identity, and compendial compliance are not verified.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Signed zero is exported as zero.
Alternative or Complementary methods
Use the appropriate authenticated reference material, analytical protocol, and source records for a full laboratory assessment. Verify moisture basis, response factors, and extract/carrier definitions before comparing results.
References
Similar or alternative tools
- Marker Assay Dry Basis Gap
Compare supplied mass-fraction assay bases without identifying compounds or evaluating a product.
- Botanical Moisture Dry Weight Share
For positive wetMass and waterMass within zero through wetMass return dryMass=wetMass-waterMass and dryFraction=dryMass/wetMass.