EN 14385 - Heavy Metals Flashcards
Which 11 specific metals are referenced in the Standard?
EN 14385 - Heavy Metals
Arsenic (As) | Cadmium (Cd) | Chromium (Cr) | Copper (Cu) | Manganese (Mn) | Nickel (Ni) | Lead (Pb) | Antimony (Sb) | Thallium (Tl) | Vanadium (V)
MID allows other metals to be sampled
EN 14385 - Heavy Metals
What is the range of the method for each specific metal?
EN 14385 - Heavy Metals
0.005 to 0.5 mg/m³
EN 14385 - Heavy Metals
Name the 3 normative references in the Standard
EN 14385 - Heavy Metals
EN 13284-1 - total particulate matter
EN 13211 - mercury
ISO 5725 - accuracy
EN 14385 - Heavy Metals
How many and when must a blank be taken?
EN 14385 - Heavy Metals
One per sampling location per sampling campaign
EN 14385 - Heavy Metals
What vessel is the filter digested in?
EN 14385 - Heavy Metals
In a closed PTFE vessel at elevated temperature and pressure using nitric acid and hydrofluoric acid
EN 14385 - Heavy Metals
List the 4 permissible sampling train materials?
EN 14385 - Heavy Metals
Glass | Quartz | PTFE |Titanium
EN 14385 - Heavy Metals
What temperature must the absorbers be kept below?
EN 14385 - Heavy Metals
30°C
EN 14385 - Heavy Metals
What is the permissible accuracy of the volume measurement device (DGM)?
EN 14385 - Heavy Metals
2%
EN 14385 - Heavy Metals
What is the allowable absolute MU of the pressure measurement for gas volume?
EN 14385 - Heavy Metals
1%
EN 14385 - Heavy Metals
What is the allowable absolute MU of the temperature measurement for gas volume?
EN 14385 - Heavy Metals
1%
EN 14385 - Heavy Metals
Where a flow meter is used, what is the allowable MU of this device?
EN 14385 - Heavy Metals
5%
EN 14385 - Heavy Metals
What is the allowable concentration of each metal in the blank absorption solution?
EN 14385 - Heavy Metals
< 1 µg/l
EN 14385 - Heavy Metals
What is the allowable concentration of each metal in the blank filter?
EN 14385 - Heavy Metals
< 1 µg/m³ (Quartz Fibre)
EN 14385 - Heavy Metals
What absorption solution is utilised?
EN 14385 - Heavy Metals
Nitric peroxide solution
EN 14385 - Heavy Metals
What is the acceptable concentration of each metal present in the last impinger as a percentage of the total?
EN 14385 - Heavy Metals
< 10%
EN 14385 - Heavy Metals
When do the absorption efficiency requirements NOT apply (2 things)?
EN 14385 - Heavy Metals
- Where the individual element is < 1% of the total
- If the total concentration for the group is < 30% of the daily ELV
EN 14385 - Heavy Metals
What temperature should the sampling train be maintained at?
EN 14385 - Heavy Metals
> 20K above the flue gas temperature or the dew point temperature (whichever is higher). No requirement to heat any higher than 180°C
[Atesta use a standard 160°C]
EN 14385 - Heavy Metals
What is the allowable leak?
EN 14385 - Heavy Metals
< 2% of expected sample flow
EN 14385 - Heavy Metals
What temperature should the samples be stored at?
EN 14385 - Heavy Metals
Standard requires < 6°, MID allows < 25°C in a cool dark place
EN 14385 - Heavy Metals
How many days must the sample be analysed in?
EN 14385 - Heavy Metals
14 days from birth
EN 14385 - Heavy Metals
Name 3 different laboratory techniques for analysis
EN 14385 - Heavy Metals
- AAS
- ICP-OES
- ICP-MS
EN 14385 - Heavy Metals
What rinse solution is used?
EN 14385 - Heavy Metals
Standard requires 25% nitric acid, EA allows 5% nitric acid on H&S grounds.
EN 14385 - Heavy Metals
What shall the measurement uncertainty value at the daily ELV not exceed for Cd & Tl?
EN 14385 - Heavy Metals
± 30% on a dry gas basis before correction to oxygen
EN 14385 - Heavy Metals
What shall the measurement uncertainty value at the daily ELV not exceed for all metals with the exception of Cd & Tl?
EN 14385 - Heavy Metals
± 20% on a dry gas basis before correction to oxygen
EN 14385 - Heavy Metals
What typical flow rate is suggested in the Standard?
EN 14385 - Heavy Metals
0.5 to 2.0 m³/hr (8 to 33 l/min)
EN 14385 - Heavy Metals
What concentration of HF present in the gas stream is the cut off for using titanium in the sampling train (in ppm)?
EN 14385 - Heavy Metals
20 ppm
EN 14385 - Heavy Metals
What is the allowable detection limit for each individual metal?
EN 14385 - Heavy Metals
≤5 µg/m³
EN 14385 - Heavy Metals
What rinse solution is used?
EN 14385 - Heavy Metals
5% Nitric acid (Standard requires 25% but MID allows 5% on H&S grounds)
EN 14385 - Heavy Metals
