EPA method 200.7 calibration no. 4

Aluminum nitrate nonahydrate (ICP grade) (as aluminum)
1000 µg/mL
CAS #: 7784-27-2

Calcium carbonate (ICP grade) (as calcium)
1000 µg/mL
CAS #: 471-34-1

Chromium (III) nitrate nonahydrate (ICP grade) (as chromium)
500 µg/mL
CAS #: 7789-02-8

Magnesium nitrate hexahydrate (ICP grade) (as magnesium
1000 µg/mL
CAS #: 13446-18-9

Nickel (II) nitrate hexahydrate (ICP grade) (as nickel)
500 µg/mL
CAS #: 13478-00-7

Potassium nitrate (ICP grade) (as potassium)
1000 µg/mL
CAS #: 7757-79-1

Silver nitrate (ICP grade) (as silver)
500 µg/mL
CAS #: 7761-88-8

Sodium nitrate (ICP grade) (as sodium)
1000 µg/mL
CAS #: 7631-99-4

Zinc nitrate hexahydrate (ICP grade) (as zinc)
500 µg/mL
CAS #: 10196-18-6