peCHECK

peCHECK CRMs are cost effective performance evaluation standards for routine analysis compliance testing. These standards are available for minerals, nutrients, and solids in water/wastewater matrices and are certified through a comprehensive round-robin study providing independent verification from multiple laboratories.

  • 20 ml vials. No pipetting necessary. Just dilute to volume. Each standard dilutes to 1 L
    - Eliminate a source of potential error, save time with single stop preparation

  • Certificate of Analysis listing consensus values as well as confidence and tolerance intervals
    - Monitor lab performance in a cost effective, simple manner

  • Prepared in large batches
    - Same lot number available time after time allows the possibility of control charting
   
Level 1 Nutrients Catalogue Number: 140-701-101
Parameter
Unit
Consensus Value
Confidence Interval
Ammonia (as N)
mg/L
1.07
1.04-1.11
Nitrate (as N)
mg/L
1.42
1.39-1.45
O-Phosphate (as P)
mg/L
0.78
0.77-0.80
Total Kjeldahl Nitrogen
mg/L
1.18
1.06-1.30
Total Phosphorus
mg/L
0.74
0.72-0.76
Level 1 Solids Catalogue Number: 140-702-101
Parameter
Unit
Consensus Value
Confidence Interval
Suspended Solids
mg/L
240
236-243
Dissolved Solids
mg/L
8.3
0.0-16.7
Total Solids
mg/L
244
236-253
   
   
Level 2 Nutrients Catalogue Number: 140-701-102
Parameter
Unit
Consensus Value
Confidence Interval
Ammonia (as N)
mg/L
8.59
7.98-9.21
Nitrate (as N)
mg/L
13.3
12.9-13.7
O-Phosphate (as P)
mg/L
4.42
4.17-4.66
Total Kjeldahl Nitrogen
mg/L
20.2
19.2-21.2
Total Phosphorus
mg/L
4.64
4.31-4.98
Level 2 Solids Catalogue Number: 140-702-102
Parameter
Unit
Consensus Value
Confidence Interval
Suspended Solids
mg/L
380
374-385
Dissolved Solids
mg/L
44.8
21.3-68.3
Total Solids
mg/L
400
380-419
   
   
Level 3 Nutrients Catalogue Number: 140-701-103
Parameter
Unit
Consensus Value
Confidence Interval
Ammonia (as N)
mg/L
14.7
14.2-15.2
Nitrate (as N)
mg/L
26.5
25.6-27.3
O-Phosphate (as P)
mg/L
9.33
9.11-9.55
Total Kjeldahl Nitrogen
mg/L
45.3
42.8-47.8
Total Phosphorus
mg/L
9.76
8.75-10.77
Level 3 Solids Catalogue Number: 140-702-103
Parameter
Unit
Consensus Value
Confidence Interval
Suspended Solids
mg/L
1928
1895-1961
Dissolved Solids
mg/L
46.0
25.3-66.8
Total Solids
mg/L
1976
1942-1999
   
   
Level 1 Minerals Catalogue Number: 140-704-101
Parameter
Unit
Consensus Value
Confidence Interval
Conductivity
µmhos/cm
188
183-193
Ttl. Hardness (CaCO3)
mg/L
11.6
11.3-12.0
Ttl. Dissolved Solids
mg/L
102
91-112
Calcium (Ca)
mg/L
2.62
2.50-2.75
Potassium (K)
mg/L
8.77
8.46-9.08
Magnesium (Mg)
mg/L
1.22
1.16-1.27
Sodium (Na)
mg/L
18.1
17.4-18.7
Chloride (Cl)
mg/L
19.7
19.1-20.2
Fluoride (F)
mg/L
0.50
0.48-0.53
Sulfate (SO4)
mg/L
8.41
7.90-8.92
Level 2 Minerals Catalogue Number: 140-704-102
Parameter
Unit
Consensus Value
Confidence Interval
Conductivity
µmhos/cm
3333
3225-3441
Ttl. Hardness (CaCO3)
mg/L
226
215-236
Ttl. Dissolved Solids
mg/L
1335
1191-1479
Calcium (Ca)
mg/L
63.9
61.8-65.9
Potassium (K)
mg/L
168
162-174
Magnesium (Mg)
mg/L
16.4
15.9-17.0
Sodium (Na)
mg/L
99.6
95.5-103.7
Chloride (Cl)
mg/L
105
102-107
Fluoride (F)
mg/L
3.85
3.33-4.37
Sulfate (SO4)
mg/L
164
155-174
   
   
Level 3 Minerals Catalogue Number: 140-704-103
Parameter
Unit
Consensus Value
Confidence Interval
Conductivity
µmhos/cm
5803
5603-6002
Ttl. Hardness (CaCO3)
mg/L
531
520-542
Ttl. Dissolved Solids
mg/L
3051
2990-3111
Calcium (Ca)
mg/L
136
132-140
Potassium (K)
mg/L
466
434-497
Magnesium (Mg)
mg/L
45.4
44.9-46.0
Sodium (Na)
mg/L
342
331-353
Chloride (Cl)
mg/L
430
420-441
Fluoride (F)
mg/L
12.3
11.8-12.9
Sulfate (SO4)
mg/L
397
384-411
 
   
   
peCHECK CRMs
Catalogue Number
Mineral Standard, level 1
140-704-101
Mineral Standard, level 2
140-704-102
Mineral Standard, level 3
140-704-103
Nutrient Standard, level 1
140-701-101
Nutrient Standard, level 2
140-701-102
Nutrient Standard, level 3
140-701-103
Solids Standard, level 1
140-702-101
Solids Standard, level 2
140-702-102
Solids Standard, level 3
140-702-103