Сталь та чавун. Визначення фосфору спектрофотометричним методом з використанням фосфорованадомолібдату

1 2 4

1 2 З? 4 5 6 7 8 9

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STEEL AND IRON

Determination of phoshporus content usingphosphovanadomolybdate spectrophotometric method
1 2 ISO 377-2:1989 Selection and preparation of samples and test pieces of wrought steels — Part 2: Samples for determination of the chemical composition
ISO 385-1:1984 Laboratory glassware — Burettes — Part 1: General requirements
ISO 648:1977 Laboratory glassware — One-mark pipettes
ISO 1042:1983 Laboratory glassware — One-mark volumetric flasks
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods.
ISO 5725:1986 Precision of test methods — Determination of repeatability and reproducibility for a standard test methods by interlaboratory tests.

ISO 377-2:1989 ISO 385-1:1984 ISO 648:1977 ISO 1042:1983 ISO 3696:1987 ISO 5725:1986

4.5 4.6 4.7 4- 4.8 4.9 4.10 4.11 75 4.12 4.12.1 1 4.12.2 1 5 5.1

5.2 ( 5.3 6 7 7.1 7.2 7.3 7.3.1 7.3.1.1 7.3.1.2 7.3.2 7.3.3 7.4 7.4.1 7.4.2 7.4.3 8 8.1
D — 8.2 V 9 а?) Ь?) с?) d) е?)
IVp.z —

Igr == 0,8740 4 4.1 4.2 4.3 4.4