ASTM E50-17

Standard Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials

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STANDARD published on 1.9.2017

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The information about the standard:

Designation standards: ASTM E50-17
Note: WITHDRAWN
Publication date standards: 1.9.2017
SKU: NS-796877
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Chemical analysis of metals

Annotation of standard text ASTM E50-17 :

Keywords:

apparatus, chemical analysis, reagents, safety,, ICS Number Code 77.040.30 (Chemical analysis of metals)

Additional information

Significance and Use

4.1 The inclusion of the following paragraph, or a suitable equivalent, in any standard (preferably after the section on Scope) is due notification that the apparatus and reagents required in that standard are subject to the recommendations set forth in these practices.

“Apparatus and Reagents—Apparatus and reagents required for each determination are listed in separate sections preceding the procedure. Apparatus, standard solutions, and certain other reagents shall conform to the requirements prescribed in ASTM Practices E50, for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials.”

TABLE 1 Chemical Reagents Specified in ASTM Methods for Chemical Analysis of Metals

Name	Formula
* Acetic acid	CH₃COOH
Acetone	CH₃COCH₃
Acetylacetone (2,4-pentanedione)	CH₃COCH₂COCH₃
Alizarin-Red-S	C₆H₄COC₆H-1,2-(OH)₂-3-SO₃NaCO
Aluminon (aurintricarboxylic acid-ammonium salt)	(4-HOC₆H₃-3-COONH₄)₂C:C₆H-3-(COONH₄):O
Aluminum metal (99.9 % min)	Al
* Aluminum metal (sheet or rolled foil)	Al
Aluminum ammonium sulfate	Al₂(NH₄)₂(SO₄)₄·24H₂O
Aluminum nitrate	Al(NO₃)₃·9H₂O
Aluminum sulfate	Al₂(SO₄)₃·18H₂O
Aluminum oxide, fused (Alundum)
1-Amino-2-naphthol-4-sulfonic acid	NH₂C₁₀H₅(OH)SO₃H
Ammonium acetate	CH₃COONH₄
Ammonium benzoate	C₆H₅COONH₄
Ammonium bifluoride	NH₄FHF
Ammonium bisulfate	NH₄HSO₄
Ammonium bisulfite	NH₄HSO₃
Ammonium carbonate	(NH₄)₂CO₃
* Ammonium chloride	NH₄Cl
* Ammonium citrate	CH₂(COONH₄)C(OH)(COOH)CH₂COONH₄
Ammonium fluoride	NH₄F
* Ammonium hydroxide^A	NH₄OH
Ammonium iodide	NH₄I
Ammonium molybdate	(NH₄)₂MoO₄
* Ammonium heptamolybdate tetrahydrate	(NH₄)₆Mo₇O₂₄·4H₂O
Ammonium nitrate	NH₄NO₃
* Ammonium oxalate	NH₄OCOCOONH₄·H₂O
* Ammonium phosphate, dibasic (diammonium acid phosphate)	(NH₄)₂HPO₄
* Ammonium persulfate (ammonium peroxydisulfate)	(NH₄)₂S₂O₈
* Ammonium sulfate	(NH₄)₂SO₄
* Ammonium tartrate	NH₄OCO(CHOH)₂COONH₄
Ammonium thiocyanate	NH₄SCN
Ammonium vanadate	NH₄VO₃
Antimony metal (powder)	Sb
Antimony trichloride	SbCl₃
* Arsenic trioxide	As₂O₃
Asbestos (for use with Gooch crucible)

Barium Chloride	BaCl₂·2H₂O
Barium diphenylamine sulfonate	(C₆H₅NHC₆H₄-4-SO₃)₂Ba
* Benzoic acid	C₆H₅COOH
α-Benzoin oxime (benzoin anti-oxime)	C₆H₅CHOHC:NOHC₆H₅
Beryllium sulfate	BeSO₄·4H₂O
Bismuth metal (99.9 % min)	Bi
Boric acid	H₃BO₃
Bromocresol green (3′,3",5′,5"-tetrabromo-m-cresolsulfonephthalein)	C₆H₄SO₂OC(C₆H-3,5-Br₂-2-CH₃-4-OH)₂
Bromocresol purple (5′,5"-Dibromo-o-cresolsulfonephthalein)	C₆H₄SO₂OC(C₆H₂-3-CH₃-5-Br-4-OH)₂
Bromine (liquid)	Br₂
Bromophenol blue (3′,3",5′,5"-tetrabromophenolsulfonephthalein)	C₆H₄SO₂OC(C₆H₂-3,5-Br₂-4-OH)₂
1-Butanol	CH₃CH₂CH₂CH₂OH
Butyl acetate (normal)	CH₃COOCH₂CH₂CH₂CH₃

* Cadmium chloride	CdCl₂·2¹/₂ H_{Cadmium chloride, anhydrous}	CdCl₂
* † Calcium carbonate (low-boron)	CaCO₃
Carbon dioxide (gas)	CO₂
Carbon dioxide (solid)	CO₂
Carbon tetrachloride	CCl₄
Carminic acid	1,3,4-(HO)₃-2-C₆H₁₁O₆C₆COC₆H-5-COOH-6-OH-8-CH_{* Chloroform}	CHCl₃
Cinchonine	C₁₉H₂₂N₂O
Citric acid	HOC(COOH)(CH₂COOH)₂
Cobalt metal	Co
Cobalt sulfate	CoSO₄
Coke
Congo red test paper
Copper metal (99.9 % min)	Cu
* Copper metal (powder or turnings)	Cu
Copper metal (P-free)	Cu
Copper metal (Mn, Ni, and Co-free, less than 0.001 % of each)	Cu
Copper-rare earth oxide mixture
m-Cresol purple (m-cresolsulfonephthalein)	C₆H₄SO₂OC(C₆H₃-2-CH₃-4-OH)₂
Cupferron	C₆H₅N(NO)ONH₄
Cupric chloride	CuCl₂·2H₂O
* Cupric nitrate	Cu(NO₃)₂·3H₂O
* Cupric oxide (powder)	CuO
Cupric potassium chloride	CuCl₂·2KCl·2H₂O
* Cupric sulfate	CuSO₄·5H₂O
Curcumin	(2-CH₃OC₆H₃-1-OH-4-CH:CHCO)
Devarda's alloy	50Cu-45Al-5Zn
Diethylenetriamine pentaacetic acid ([[(carboxymethyl)imino]bis(ethylenenenitrilo)] tetraacetic acid)	((HOCOCH₂)₂NCH₂CH₂)₂NCH₂COOH
* Dimethylglyoxime	CH₃C:NOHC:NOHCH₃
N,N′ Diphenylbenzidine	C₆H₅NHC₆H₄C₆H₄NHC₆H₅
Diphenylcarbazide (1,5-diphenylcarbohydrazide)	C₆H₅NHNHCONHNHC₆H₅
* Disodium (ethylenedinitrilo) tetraacetate dihydrate	See (ethylenedinitrilo) tetraacetic acid disodium salt
Dithiol (toluene-3,4-dithiol)	CH₃C₆H₃(SH)₂
Dithizone (diphenylthiocarbazone)	C₆H₅NHNHCSN:NC₆H₅

Eriochrome black-T (1(1-hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonic acid sodium salt)	1-HOC₁₀H₆-2-N:N-1-C₁₀H₄-2-OH-4-SO₃Na-6-NO₂
* EDTA (Disodium salt)	See (ethylenedinitrilo) tetraacetic acid disodium salt
* Ethanol	C₂H₅OH
* Ethyl ether (diethyl ether)	C₂H₅OC₂H₅
* (Ethylenedinitrilo) tetraacetic acid disodium salt	HOCOCH₂(NaOCOCH₂)NCH₂N(CH₂COONa)CH₂COOH·2H₂O
Ethylene glycol monomethyl ether (2-methoxy-ethanol)	CH₃OCH₂CH₂OH

* Ferric chloride	FeCl₃·6H₂O
* Ferric nitrate	Fe(NO₃)₃·9H₂O
Ferric sulfate	Fe₂(SO₄)₃·nH₂O
* Ferrous ammonium sulfate	Fe(NH₄)₂(SO₄)₂·6H₂O
* Ferrous sulfate	FeSO₄·7H₂O
Fluoroboric acid	HBF₄
Fluorescein, sodium salt	2NaOCOC₆H₄C:C₆H₃-3(:O)OC₆H₃-6-ONa
Formaldehyde	HCHO
* Formic acid^A	HCOOH

Gelatin
Graphite	C
Glass wool
Glycerol	CH₂OHCHOHCH₂OH

Hydrazine sulfate	NH₂NH₂·H₂SO₄
* Hydrobromic acid^A	HBr
* Hydrochloric acid^A	HCl
* Hydrofluoric acid^A	HF
Hydrogen chloride gas	HCl
* Hydrogen peroxide	H₂O₂
Hydrogen sulfide gas	H₂S
Hydroquinone	1,4-(OH)₂C₆H₄
* Hydroxylamine hydrochloride	NH₂OH·HCl
* Hypophosphorous acid^B	H₃PO₂

Invert sugar
* Iodine	I₂
Iron metal or wire (99.8 % min)	Fe
Isopropyl ether	(CH₃)₂CHOCH(CH₃)₂

Lead metal	Pb
* Lead acetate	Pb(CH₃COO)₂
Lead chloride	PbCl₂
* Lead nitrate	Pb(NO₃)₂
Litmus
Lithium fluoride	LiF

Magnesium metal (Sn-free)	Mg
Magnesium perchlorate, anhydrous	Mg(ClO₄)₂
* Magnesium sulfate	MgSO₄·7H₂O
Manganese metal (99.8 % min)	Mn
Manganous nitrate	Mn(NO₃)₂
Manganous sulfate	MnSO₄·H₂O
Mannitol	CH₂OH(CHOH)₄CH₂OH
Marble chips
* Mercuric chloride	HgCl₂
* Mercury	Hg
* Methanol	CH₃OH
Methyl isobutyl ketone (4-methyl-2-pentanone)	CH₃COCH₂CH(CH₃)₂
* Methyl orange (p[[p-dimethylamino)phenyl]azo]benzenesulfonic acid sodium salt)	4-NaOSO₂C₆H₄N:NC₆H₄-4-N(CH₃)₂
Methyl purple	formula unknown, patented
* Methyl red (o -[[(p-dimethylamino)phenyl]azo]benzoic acid)	4-(CH₃)₂NC₆H₄N:NC₆H₄-2-COOH
Molybdenum metal (99.8 % min)	Mo
Molybdic acid, anhydride (molybdenum trioxide)	MoO₃
Molybdic acid (ammonium paramolybdate)	Assay: as MoO₃—85 %
Morin, anhydrous (2′,3,4′,7-penta hydroxyflavone)	5,7-(HO)₂C₆H₂ OC(C₆H₃-2,4-(OH)₂):C(OH)CO

β-Naphthoquinoline (5,6-benzoquinoline)	C₁₀H₆CH:CHCH:N
Neocuproine (2,9-dimethyl-1,10-phenanthroline)	(CH₃)₂C₁₂H₆N₂·₁₂H₂O
Nickel metal (99.8 % min)	Ni
Nickel metal (sheet)	Ni
Nickelous nitrate	Ni(NO₃)₂·6H₂O
Nickelous sulfate	NiSO₄·6H₂O
* Nitric acid^A	HNO₃
Nitrogen gas (oxygen-free)	N₂
Nitrogen, liquid	N₂
m-Nitrophenol	NO₂C₆H₄OH
1-Nitroso-2-naphthol(α-nitroso-β-naphthol)	NOC₁₀H₆OH
Nitroso-R-salt (1-nitroso-2-naphthol-3,6-disulfonic acid disodium salt)	1-NOC₁₀H₄-2-(OH)-3,6-(SO₃Na)₂

Osmium tetraoxide	OsO₄
Oxalic acid	(COOH)₂
Oxygen gas	O₂

* Perchloric acid^A	HClO₄
1,10-Phenanthroline (o -phenanthroline)	CH:CHCH:NC:CCH:CHC:CN:CHCH:CH·H₂O
* Phenolphthalein	C₆H₄COOC(C₆H₄-4-OH)₂
* Phosphoric acid	H₃PO₄
Piperidine	NH(CH₂)₄CH₂
Platinized quartz
Platinized silica gel
Platinum gauze	Pt
* Potassium biphthalate	1-KOCOC₆H₄-2-COOH
Potassium bisulfate	KHSO₄
* Potassium bromate	KBrO₃
* Potassium bromide	KBr
* Potassium chlorate	KClO₃
* Potassium chloride	KCl
* Potassium chromate	K₂CrO₄
Potassium columbate	4K₂O·3Cb₂O₅·16H₂O
* Potassium cyanide	KCN
* Potassium dichromate	K₂Cr₂O₇
* Potassium ferricyanide	K₃Fe(CN)₆
Potassium ferrocyanide	K₄Fe(CN)₆·3H₂O
* Potassium fluoride	KF·2H₂O
* Potassium hydroxide	KOH
* Potassium iodate	KIO₃
* Potassium iodide	KI
Potassium iodide starch paper
* Potassium nitrate	KNO₃
* Potassium m-periodate	KIO₄
* Potassium permanganate	KMnO₄
Potassium persulfate	K₂S₂O₈
Potassium phosphate, monobasic	KH₂PO₄
* Potassium pyrosulfate	K₂S₂O₇
* Potassium sulfate	K₂SO₄
Potassium tantalum fluoride	K₂TaF
Potassium thiocarbonate	K₂CS₃
* Potassium thiocyanate	KSCN
Pyrogallic acid (pyrogallol)	C₆H₃-1,3-(OH)₃

Quinine sulfate	(C₂₀H₂₄N₂O₂)₂·H₂SO₄·2H₂O
8-Quinolinol (8-hydroxyquinoline)	HOC₆H₃N:CHCH:CH

Sebacic acid	HOCO(CH₂)₈COOH
Selenium (powder)	Se
Silicon dioxide (silica)	SiO₂
* Silver nitrate	AgNO₃
Soda-lime
Soda-mica mineral (CO₂ absorbent)
Sodium acetate	CH₃COONa
Sodium arsenite	NaAsO₂
Sodium azide	NaN₃
* Sodium bicarbonate	NaHCO₃
* Sodium bismuthate	NaBiO₃
Sodium bisulfate	see sodium hydrogen sulfate
* Sodium bisulfate, fused	see sodium hydrogen sulfate, fused
Sodium bisulfite	NaHSO₃
* Sodium borate	Na₂B₄O₇·10H₂O
* Sodium carbonate, anhydrous	Na₂CO₃
Sodium chlorate	NaClO₃
Sodium chloride	NaCl
Sodium citrate	HOC(COONa)(CH₂COONa)₂·2H₂O
Sodium cyanide	NaCN
Sodium diethyldithiocarbamate	(C₂H₅)₂NCSSNa·3H₂O
Sodium dimethylglyoximate	CH₃C(:NONa)C(:NONa)CH_{Sodium diphenylamine sulfonate}	C₆H₅NHC₆H₄-4-SO₃Na
Sodium dithionite (hydrosulfite)	Na₂S₂O₄
* Sodium fluoride	NaF
Sodium hydrogen sulfate	NaHSO₄
Sodium hydrogen sulfate, fused	A mixture of Na₂S₂O₇ and NaHSO₄
* Sodium hydroxide	NaOH
Sodium hypophosphite	NaH₂PO₂·H₂O
Sodium molybdate	Na₂MoO₄·2H₂O
Sodium nitrate	NaNO₃
Sodium nitrite	NaNO₂
Sodium oxalate	NaOCOCOONa
Sodium perchlorate	NaClO₄
Sodium peroxide	Na₂O₂
Sodium phosphate, dibasic, anhydrous	Na₂HPO₄
Sodium pyrophosphate	Na₄P₂O₇·10H₂O
Sodium pyrosulfate	Na₂S₂O₇
Sodium sulfate, anhydrous	Na₂SO₄
Sodium sulfide	Na₂S·9H₂O
Sodium sulfite	Na₂SO₃·7H₂O
Sodium sulfite, anhydrous	Na₂SO₃
Sodium thiocyanate	NaSCN
* Sodium thiosulfate	Na₂S₂O₃·5H₂O
* Sodium tungstate	Na₂WO₄·2H₂O
* Stannous chloride	SnCl₂·2H₂O
* Starch	(C₆H₁₀O₅)_x
Succinic acid	HOCOCH₂CH₂COOH
Sulfamic acid	NH₂SO₃H
Sulfatoceric acid (ceric sulfate)	H₄Ce(SO₄)₄
5-Sulfosalicylic acid	2-HOC₆H₃-1-COOH-5-SO₃H·2H₂O
Sulfur dioxide gas	SO₂
* Sulfuric acid^A	H₂SO₄
* Sulfurous acid^A	H₂SO₃

Talc
* Tartaric acid	HOCO(CHOH)₂COOH
Test lead	Pb
Tetrapropylammonium hydroxide	(CH₃CH₂CH₂)₄NOH
Thioglycollic acid (mercaptoacetic acid)	CH₂SHCOOH
Thiourea	NH₂CSNH₂
Tin metal (99.9 %min)	Sn
Titanium dioxide	TiO₂
Titanium metal (low Sn)	Ti
Triethanolamine (2,2′,2"-nitrilotriethanol)	(CH₂OHCH₂)₃N

Uranium oxide	U₃O₈
* Uranyl nitrate	UO₂(NO₃)₂·6H₂O
Urea	NH₂CONH₂

Zinc (99.9 % min)	Zn
Zinc metal (S-free)	Zn
Zinc oxide	ZnO
Zinc sulfate	ZnSO₄·7H₂O
Zirconium oxide	ZrO₂
Zirconium metal	Zr
Zirconyl chloride	ZrOCl₂·8H₂O

† ACS specification exists but does not cover all requirements.

For concentration of laboratory reagent, see Table 2.

4.2 It is assumed that the users of these practices will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly-equipped laboratory.

1. Scope

1.1 These practices cover laboratory apparatus and reagents that are required for the chemical analysis of metals, ores and related materials by standard methods of ASTM. Detailed descriptions of recommended apparatus and detailed instructions for the preparation of standard solutions and certain nonstandardized reagents will be found listed or specified in the individual methods of analysis. Included here are general recommendations on the purity of reagents and protective measures for the use of hazardous reagents.

1.2 These recommendations are intended to apply to the ASTM methods of chemical analysis of metals when definite reference is made to these practices, as covered in Section 4.

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: The use of the verb “shall” (with its obligatory third person meaning) in this standard has been confined to those aspects of laboratory safety where regulatory requirements are known to exist. Such regulations, however, are beyond the scope of these practices.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

E438-92(2024)	Standard Specification for Glasses in Laboratory Apparatus
E694-18(2024)	Standard Specification for Laboratory Glass Volumetric Apparatus
E77-14(2021)	Standard Test Method for Inspection and Verification of Thermometers
E100-19	Standard Specification for ASTM Hydrometers
E126-19	Standard Test Method for Inspection, Calibration, and Verification of ASTM Hydrometers
E287-02(2019)	Standard Specification for Laboratory Glass Graduated Burets
E288-10(2017)	Standard Specification for Laboratory Glass Volumetric Flasks
D1193-06(2018)	Standard Specification for Reagent Water
E1-14(2020)	Standard Specification for ASTM Liquid-in-Glass Thermometers
E542-22	Standard Practice for Gravimetric Calibration of Laboratory Volumetric Instruments
E969-02(2019)	Standard Specification for Glass Volumetric (Transfer) Pipets
E1044-96(2024)	Standard Specification for Glass Serological Pipets (General Purpose and Kahn)
E1621-22	Standard Guide for Elemental Analysis by Wavelength Dispersive X-Ray Fluorescence Spectrometry

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