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Technical Endorsement 2 > EN 14385 - Heavy Metals > Flashcards

EN 14385 - Heavy Metals Flashcards

1
Q

Which 11 specific metals are referenced in the Standard?

EN 14385 - Heavy Metals

A

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

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2
Q

What is the range of the method for each specific metal?

EN 14385 - Heavy Metals

A

0.005 to 0.5 mg/m³

EN 14385 - Heavy Metals

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3
Q

Name the 3 normative references in the Standard

EN 14385 - Heavy Metals

A

EN 13284-1 - total particulate matter
EN 13211 - mercury
ISO 5725 - accuracy

EN 14385 - Heavy Metals

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4
Q

How many and when must a blank be taken?

EN 14385 - Heavy Metals

A

One per sampling location per sampling campaign

EN 14385 - Heavy Metals

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5
Q

What vessel is the filter digested in?

EN 14385 - Heavy Metals

A

In a closed PTFE vessel at elevated temperature and pressure using nitric acid and hydrofluoric acid

EN 14385 - Heavy Metals

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6
Q

List the 4 permissible sampling train materials?

EN 14385 - Heavy Metals

A

Glass | Quartz | PTFE |Titanium

EN 14385 - Heavy Metals

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7
Q

What temperature must the absorbers be kept below?

EN 14385 - Heavy Metals

A

30°C

EN 14385 - Heavy Metals

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8
Q

What is the permissible accuracy of the volume measurement device (DGM)?

EN 14385 - Heavy Metals

A

2%

EN 14385 - Heavy Metals

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9
Q

What is the allowable absolute MU of the pressure measurement for gas volume?

EN 14385 - Heavy Metals

A

1%

EN 14385 - Heavy Metals

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10
Q

What is the allowable absolute MU of the temperature measurement for gas volume?

EN 14385 - Heavy Metals

A

1%

EN 14385 - Heavy Metals

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11
Q

Where a flow meter is used, what is the allowable MU of this device?

EN 14385 - Heavy Metals

A

5%

EN 14385 - Heavy Metals

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12
Q

What is the allowable concentration of each metal in the blank absorption solution?

EN 14385 - Heavy Metals

A

< 1 µg/l

EN 14385 - Heavy Metals

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13
Q

What is the allowable concentration of each metal in the blank filter?

EN 14385 - Heavy Metals

A

< 1 µg/m³ (Quartz Fibre)

EN 14385 - Heavy Metals

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14
Q

What absorption solution is utilised?

EN 14385 - Heavy Metals

A

Nitric peroxide solution

EN 14385 - Heavy Metals

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15
Q

What is the acceptable concentration of each metal present in the last impinger as a percentage of the total?

EN 14385 - Heavy Metals

A

< 10%

EN 14385 - Heavy Metals

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16
Q

When do the absorption efficiency requirements NOT apply (2 things)?

EN 14385 - Heavy Metals

A
  1. Where the individual element is < 1% of the total
  2. If the total concentration for the group is < 30% of the daily ELV

EN 14385 - Heavy Metals

17
Q

What temperature should the sampling train be maintained at?

EN 14385 - Heavy Metals

A

> 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

18
Q

What is the allowable leak?

EN 14385 - Heavy Metals

A

< 2% of expected sample flow

EN 14385 - Heavy Metals

19
Q

What temperature should the samples be stored at?

EN 14385 - Heavy Metals

A

Standard requires < 6°, MID allows < 25°C in a cool dark place

EN 14385 - Heavy Metals

20
Q

How many days must the sample be analysed in?

EN 14385 - Heavy Metals

A

14 days from birth

EN 14385 - Heavy Metals

21
Q

Name 3 different laboratory techniques for analysis

EN 14385 - Heavy Metals

A
  1. AAS
  2. ICP-OES
  3. ICP-MS

EN 14385 - Heavy Metals

22
Q

What rinse solution is used?

EN 14385 - Heavy Metals

A

Standard requires 25% nitric acid, EA allows 5% nitric acid on H&S grounds.

EN 14385 - Heavy Metals

23
Q

What shall the measurement uncertainty value at the daily ELV not exceed for Cd & Tl?

EN 14385 - Heavy Metals

A

± 30% on a dry gas basis before correction to oxygen

EN 14385 - Heavy Metals

24
Q

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

A

± 20% on a dry gas basis before correction to oxygen

EN 14385 - Heavy Metals

25
Q

What typical flow rate is suggested in the Standard?

EN 14385 - Heavy Metals

A

0.5 to 2.0 m³/hr (8 to 33 l/min)

EN 14385 - Heavy Metals

26
Q

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

A

20 ppm

EN 14385 - Heavy Metals

27
Q

What is the allowable detection limit for each individual metal?

EN 14385 - Heavy Metals

A

≤5 µg/m³

EN 14385 - Heavy Metals

28
Q

What rinse solution is used?

EN 14385 - Heavy Metals

A

5% Nitric acid (Standard requires 25% but MID allows 5% on H&S grounds)

EN 14385 - Heavy Metals

Technical Endorsement 2 (4 decks)

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