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Flashcards in Calculations in Toxicology Deck (12):
1

What does PPM stand for?

Parts per million

2

What does PPB stand for?

Parts per billion

3

What does PPT stand for?

Parts per trillion

4

1 ppm equals what?

1 ppm = 1 mg (chemical)/kg (material)

5

What is the conversion of 1 ppm to a percentage?

1 ppm = 1 mg/kg
= 0.000001 x 100
= 0.0001%

6

How many places do you move the decimal point to convert from ppm to percentage?

4 to the left

7

How many decimal places do you move the decimal point to convert percentage to ppm?

4 to the right

8

How do you make a diluted solution from a concentrated stock solution?

mL needed = (% required dilution/% of the stock)) X (volume required in mL from the stock)

9

How do you convert from (g)/ton in feed to ppm?

100 g/ton = 110 ppm
1 g/ton = 1.1 ppm

10

What is the conversion from the level of drug in feed as ppm to toxicity (mg/kg)?

Toxicity (mg/kg) = (ppm in feed) X (% of feed consumed daily)

11

What is the conversion from toxicity (mg/kg) to level in feed as ppm?

Level in feed (ppm) = (toxicity (mg/kg)) / (% of feed consumed daily)

12

What is the most common method of expressing concentrations in veterinary toxicology?

Part per million (ppm) on weight/weight basis