GOST 18337-95

• gost-18337-95.pdf (431.09 KiB)
  ГОСТ 18337-95

GOST 18337−95 Thallium. Specifications

GOST 18337−95

Group W51

INTERSTATE STANDARD

THALLIUM

Specifications

Thallium. Specifications

ISS 77.120*
GST 17 6850
______________
* In the index «National standards» 2005 ACS 77.120.99. — Note the CODE.

Date of introduction 1999−07−01

Preface

1 DEVELOPED by the Interstate technical Committee MTC 504 «Zinc, lead», Eastern research mining and metallurgical Institute of nonferrous metals (VNIItsvetmet) of the Republic of Kazakhstan

INTRODUCED by Committee on standardization, Metrology and certification under the Cabinet of Ministers of the Republic of Kazakhstan

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 8 dated October 12, 1995)

The adoption voted:

3 Resolution of the State Committee of the Russian Federation for standardization and Metrology, dated 26 January 1999, N 14 inter-state standard GOST 18337−95 introduced directly as state standard of the Russian Federation from July 1, 1999

4 REPLACE GOST 18337−80

5. REISSUE

1 Scope

This standard applies to thallium in ingots and granules.

2 Normative references

The present standard features references to the following standards:

GOST 12.1.005−88 SSBT. General hygiene requirements for working zone air

GOST 12.3.009−76 OCCUPATIONAL SAFETY STANDARDS. The work of loading and unloading. General safety requirements

GOST 12.4.010−75 SSBT. Personal protective equipment. Mittens special. Specifications

GOST 12.4.011−89 OCCUPATIONAL SAFETY STANDARDS. Means of protection of workers. General requirements and classification

GOST 12.4.013−85* SSLS. Glasses protective. Types
___________________
* On the territory of the Russian Federation GOST R 12.4.013−97.

GOST 12.4.021−75 SSBT. System ventilation. General requirements

GOST 12.4.028−76 OCCUPATIONAL SAFETY STANDARDS. Respirators SB-1 «Petal». Specifications

GOST 12.4.131−83 SSBT. Bathrobes for women. Specifications

GOST 12.4.133−83* SSLS. Personal protective equipment hands. Glove chamber. General technical requirements
__________________
* On the territory of the Russian Federation GOST R 12.4.204−99. — Note the CODE.

GOST 1770−74 laboratory Glassware measuring glass. Cylinders, beakers, flasks, test tubes. General specifications

GOST 2991−85 wooden disposable Boxes for loads up to 500 kg. General specifications

GOST 3118−77 hydrochloric Acid. Specifications

The Wire GOST 3282−74 General purpose low carbon steel. Specifications

GOST 3560−73 package steel Strip. Specifications

GOST 4461−77 nitric Acid. Specifications

GOST 5679−91 Wool, cotton, clothing and furniture. Specifications

GOST 5789−78 Toluene. Specifications

GOST 6709−72 distilled Water. Specifications

GOST 8273−75 wrapping Paper. Specifications

GOST 9078−84 flat Pallets. General specifications

GOST 9147−80 Glassware and equipment lab porcelain. Specifications

GOST 9569−79 waxed Paper. Specifications

GOST 10354−82 polyethylene Film. Specifications

GOST 14192−96 Marking of cargo

GOST 16711−84 Basis of waxed paper. Specifications

GOST 20478−75 Ammonium neccersarily. Specifications

GOST 20997.0−81 Thallium. General requirements for methods of spectral analysis

GOST 20997.1−81 Thallium. Method of spectral determination of mercury

GOST 20997.2−81 Thallium. Method of spectral determination of aluminium, iron, copper, Nickel, tin, silver and lead

GOST 20997.3−81 Thallium. Method of spectral determination of cadmium and zinc

GOST 20997.4−81 Thallium. Method chemical-spectral determination of aluminium, iron, bismuth, cadmium, indium, copper, manganese, Nickel, lead, silver and zinc

GOST 20997.5−81 Thallium. Method of chemical-spectral determination of tin

GOST 21650−76 means of fastening of package cargoes in transport packets. General requirements

GOST 22519.0−77 Thallium. General requirements for methods of analysis

GOST 22519.1−77 Thallium. Method for determination of iron

GOST 22519.2−77 Thallium. Method for the determination of Nickel

GOST 22519.3−77 Thallium. Method for the determination of silver

GOST 22519.4−77 Thallium. Method for the determination of sulfur

GOST 22519.5−77 Thallium. Method for the determination of copper, cadmium and zinc

GOST 22519.6−77 Thallium. Method for determination of lead and India

GOST 22519.7−77 Thallium. Method for determination of tin

GOST 23683−89 Paraffin oil firm. Specifications

GOST 24597−81 the packaged goods. Basic parameters and dimensions

GOST 24634−81 wooden Boxes for products delivered for export. General specifications

GOST 25336−82 Glassware and equipment laboratory glass. The types, basic parameters and dimensions

GOST 26319−84 Loads of threat. Packaging

GOST 26663−85 transport Packs. Formation with the use of packaging. General technical requirements

GOST 27652−88 men Suits for protection against acids. Specifications

GOST 28507−90 leather Shoes for protection against mechanical influences. General specifications

GOST 29169−91 oils. Pipette with one mark

GOST 29227−91 oils. Pipettes are graduated. Part 1. General requirements

3 General technical requirements

3.1 Thallium manufactured in accordance with the requirements of this standard in accordance with technical documentation approved in the established order.

3.2 Designation of grades and their chemical composition shall conform to the requirements specified in table 1.


Table 1 — Brand and chemical composition

Percentage

OKP codes are given in Appendix A.

3.3 Thallium is supplied in form of ingots with a mass of stamps thallium TL 1 no more than 5 kg, for other brands — not more than 1,5 kg. In coordination with the consumer delivery of thallium TL grades 0000, 000 TL, TL 00 and TL 0 in the form of ingots weighing more than 1.5 kg and delivery of thallium in the form of pellets weighing not more than 50 g.

3.4 the Surface of ingots and granules must be free of foreign matter and burrs. Permitted crimp, shrinkage and dents from leveling the surface of the ingots and granules.

3.5 Each ingot of thallium brands of TL 0 and TL 1 mark mark of the manufacturer (cast) and the embossed batch number (melting).

3.6 Ingots and granules of thallium TL grades 0000, 000 TL, TL 00 and TL 0 is stored before packing in freshly distilled distilled water, thallium TL brand 1 in distilled water according to GOST 6709.

3.7 Ingots and granules of thallium TL grades 0000, 000 TL, TL 00 and TL 0 must be Packed in double, mark T 1 in single plastic bags in accordance with GOST 10354. The neck of the package is hermetically sealed.

3.8 may be placed in a single package two ingot of thallium TL grades 0000, 000 TL, TL 00 and TL 0, up to five bars of thallium stamps T 1 and pellets of any brand up to a total weight of 1 kg.

At the request of the consumer brands 0000 thallium TL, TL and TL 00 000 Packed in plastic cans with freshly distilled distilled water, stamps TL 0 — distilled water, closed tightly with lids. Above the water surface shall be a clear height of not less than 10 cm (expansion of water when it freezes).

In coordination with the consumer the mass of thallium in bag or drum are allowed 100, 200 g, etc.

Together with the ingots or pellets of thallium in the package put a label containing the brand of the metal and the batch number.

When packaging of thallium in plastic cans label is put on the jar.

3.9 Packages and cans thallium is placed in a tight wooden boxes types II-1, II-2 or III-1 according to GOST 2991. During transportation direct rail carload shipments packages thallium Packed in tight wooden boxes according to GOST 2991 type II-1, when the transportation of small shipments (neopaganismo parties) with shipments and congestion in the way — in boxes type III-2 with belts of steel strap, fastened to the castle. The gaps between the packages and the banks and walls of the box tightly filled with cotton wool GOST 5679, paper according to GOST 8273 or any other material that provides a tight pack.

The gross mass of the box must not exceed 60 kg.

Thallium, Packed in boxes, formed into packets in accordance with the normative documentation and GOST 26663 on pallets types P2, P4, 2П4 according to GOST 9078. Overall dimensions of the packages according to GOST 24597 should be no more than 1240х840х1350 mm.

Boxes with thallium shall be sealed in accordance with the requirements of GOST 21650стальной tape according to GOST 3560 or wire according to GOST 3282.

Packages thallium intended for export are Packed in boxes according to GOST 2991 type III-1 with additional requirements 24634 GOST and GOST 26319.

3.9.1 Thallium, designed for long-term storage, are Packed in bags according to GOST 16711 or wrapped in paraffined paper GOST 9569.

Packages are placed in wooden boxes of type III-1 according to GOST 2991 lined with paper inside according to GOST 16711, and pour paraffin brand In-58−62 or In-56−68 on GOST 23683.

3.10 Transport marking — according to GOST 14192 with the application in boxes with thallium, Packed in plastic jars with distilled water, manipulation of the sign «temperature Limitation».

For thallium, designed for long-term storage, labelling of the box is carried out in accordance with GOST 14192 indelible ink.

Transport labeling packaging of products intended for export, and supporting documentation must meet the requirements of foreign economic organizations.

3.11 the marks containing data on the packaged products, is applied to each package stating:

— trademark or name of manufacturer and its trademark;

— product names and brand names;

— batch number;

— weight;

— the date of manufacture.

The marking containing information on the Packed products intended for export must comply with the requirements of foreign trade organizations.

4 safety Requirements

4.1 Thallium in the form of metal and its compounds is highly toxic product and apply according to GOST 12.1.005 of the substances of 1st hazard class.

Thallium affects the Central and peripheral nervous system, gastrointestinal tract and kidneys.

Thallium can enter the body through respiratory organs, gastrointestinal tract and intact skin.

4.2 Maximum permissible concentration (MPC) of thallium (iodine, bromide) in the air of working zone of production areas according to GOST 12.1.005 — 0.01 mg/m.

4.2.1 control over the content of thallium in workplace air should be carried out in accordance with GOST 12.1.005 according to the method set out in Annex B.

4.3 due to the high toxicity and rapid oxidation of metal in air thallium should be stored under water or in hermetically welded plastic bags.

4.4 Thallium pozharovzryvobezopasnost.

4.5 All work with thallium and its compounds must be performed in a dry working clothes and safety devices in accordance with GOST 12.4.011 and the current «Standard industry regulations of free issue of workwear, footwear and protective equipment», approved in the prescribed manner.

For protection of respiratory organs and skin must use respirators type «Petal» according to GOST 12.4.028, costumes GOST 27652, bathrobes GOST 12.4.131, leather shoes by GOST 28507, gloves according to GOST 12.4.133, mittens according to GOST 12.4.010, goggles according to GOST 12.4.013.

4.6 All operations on the selection and cutting of the samples (removal of chips from the ingots, milling, mixing and reduction) and packing of thallium should be performed in fume cupboards or boxes, are equipped with exhaust devices according to GOST 12.4.021.

4.7 All waste of thallium and its remnants should be returned to the manufacturer.

4.7.1 recycling, Disposal and destruction of waste should be carried out in accordance with the rules for the disposal and waste disposal of thallium.

All contaminated water produced in industrial processes, are subject to treatment or used for technological purposes in the production process of thallium.

4.8 safety Requirements for loading and unloading by thallium — in accordance with GOST 12.8.009*.
_______________
* Probably a mistake of the original. Should read GOST 12.3.009. — Note the CODE.

5 acceptance Rules

5.1 Thallium present to the acceptance of the parties. The mass of the party must be not more than 300 kg. the Party should consist of a thallium one brand, resulting in a single technological cycle, and decorated with a single document about quality that contains:

— trademark or name of manufacturer and its trademark;

— name of the product;

brand thallium;

— the batch number;

the weight of the party;

the chemical analysis results;

— date of manufacture;

— the designation of this standard.

5.2 Checking the quality of the surface subjected to every ingot.

5.3 To control the mass and the chemical composition of thallium TL grades 0000, 000 TL, TL 00, TL 0 is taken every ingot; brand TL 1 — every fifth bar, with the party less than five ingots each ingot.

Allowed the manufacturer a sample of thallium away from the party liquid metal evenly at the beginning, middle and end of the filling process of the batch of metal in the form of pellets.

Mass fraction of iron, indium, cadmium, manganese, tin, mercury and zinc in DM 0000 TL, TL and TL 000 00 and aluminum in DM TL TL 00 000 and determine periodically once in a month.

5.4 Upon receipt of unsatisfactory results of analysis of the chemical composition of thallium party of any mark, a second analysis doubled the quantity of the sample taken from the same batch.

The results of repeated tests spread to the entire party.

5.5 acceptance Rules and control methods of all brands of thallium in the form of granules is determined by agreement between manufacturer and consumer.

6 Methods to control

6.1 controlling the surface quality of ingots and granules is carried out visually, without the use of magnifying devices.

6.2 Chemical composition of thallium is determined according to GOST 20997.0 — 20997.5 GOST and GOST 22519.0 — GOST 22519.7.

6.3 each selected for control of the ingot of thallium selected spot samples by removing a small chip on the four large fins of the ingot knife with a titanium or tantalum blade. The mass of spot samples from each ingot for the grade of TL 1 shall be not less than 5 g, for other brands — not less than 10 g.

The place of swarf is cleaned from contamination and oxidation of the metal by scraping the surface of the ingot with the blade of a knife.

6.4 Spot samples are cut into pieces the size of 2−4 mm and are combined in the combined sample, mixing thoroughly. United sample, if necessary, reduce kvantovanie to obtain a sample weighing not less than 30 g.

6.5 the Sample is divided into two parts. Each part placed in a glass, plastic or plastic containers filled with freshly distilled distilled water thallium TL grades 0000, 000 TL, TL 00 and TL 0 and distilled water thallium TL brand 1.

On packaging and label, and specify the name of the product and its brand, batch number, date of sampling, the name of a TCI controller.

One part of the sample immediately transferred to the analysis, the other stored in for three months in case of disagreement in quality assessment. Allowed a sample of thallium TL brand 1 sent for analysis, placed in a plastic bag and immediately hermetically sealed.

6.6 Mass fraction of thallium is determined by the difference between the 100% and the sum of the normalized mass fraction of impurities.

7 Transportation and storage

7.1 Thallium transporterowych by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this form, and mail parcels.

Thallium, Packed in boxes, transporterowych in packaged form in covered vehicles or in universal containers.

Thallium, Packed in jars with distilled water, transporterowych air, river and road transport at temperatures below 5 °C, in accordance with the goods transportation regulations applicable to transport of this species.

7.2 Thallium to be stored in the manufacturer’s packaging indoor.

Thallium, designed for long-term storage should be stored in packaging in a heated room with a relative humidity of 70% and temperature below 5 °C.

After removing the packaging, thallium TL grades 0000, 000 TL, TL 00 and TL 0 is stored in double-distilled distilled water, the brand of TL 1 in distilled water.

8 manufacturer’s Warranty

8.1 the Manufacturer guarantees that the quality of the thallium to the requirements of this standard, under the conditions of transportation and storage prescribed by the standard.

8.2 the Warranty period of storage of thallium, Packed in bags of polyethylene film is 6 months from the date of manufacture; of thallium, designed for long-term storage — 7 years; for thallium, Packed in plastic jars with water, the shelf life limit.

After the warranty period, the thallium may be used after removal from the metal surface oxide film by washing the ingots and pellets of thallium TL grades 0000, 000 TL and TL 00 in double-distilled distilled water.

Annex a (informative). OKP codes

APPENDIX A
(reference)

APPENDIX B (mandatory). Method for the determination of thallium by the reaction with methyl violet

APPENDIX B
(required)

B. 1 the essence of the method

The method is based on the formation of complex compounds, TL (III) with methyl purple, extractable by organic solvent, and fotomaterialy of the extract at a wavelength of 560 nm.

Conversion of TL (I) TL (III) is carried out by oxidation of the monovalent thallium solution of ammonium persulfate.

The presence of iron, lead, bismuth, arsenic, selenium, germanium, cadmium, tin and antimony does not interfere with the determination.

The sensitivity of detection of 0.1 µg/cm.

B. 2 Equipment, reagents and solutions

Spectrophotometer or photoelectrocolorimeter of any kind for measurements in the visible region of the spectrum.

Electroactivator.

Filter AFA-XII-18.

Cartridges for filters.

Colorimetric tubes.

Volumetric flasks according to GOST 1770.

Pipettes according to GOST 29227.

Pipettes according to GOST 29169.

The beakers according to GOST 25336.

Cup varicellae according to GOST 9147.

Nitric acid according to GOST 4461.

Hydrochloric acid according to GOST 3118.

Ammonium neccersarily according to GOST 20478, a solution with a mass fraction of 2%.

Thallium sulphate.

Methyl purple solution with a mass fraction of 0.2%.

Toluene according to GOST 5789.

A mixture of hydrochloric and nitric acids in the ratio 1:3.

Solution a: 0,1200 g sulfuric acid thallium TlSOdissolved with water in a volumetric flask with a capacity of 1 DM.

1 cmof the solution contains 100 micrograms of thallium.

Solution B: 10 cmof solution A diluted with water in a volumetric flask with a capacity of 1 DM.

1 cmof the solution contains 10 µg of thallium.

B. S Sampling for analysis

B. 3.1 100 DMof the investigated air at a speed of 15 DM/min drawn through a cartridge placed in the filter AFA-XII-18.

For analysis prepare two samples.

B. 4 analysis

B. 4.1 Filter is carefully removed from the holder, placed in a glass, pour 5 cmof the mixture of acids and heated to boiling. Further, the filter is drained and washed with 3 cmof the same mixture. The washing liquid is poured together and evaporated to dryness on a water bath. The residue in the Cup pour 2 cmof hydrochloric acid, again evaporated to dryness and transferred by dissolving in 5 cmof water in a test tube. Then make a 2 cmof a solution of ammonium persulfate and the volume was adjusted with water up to 8 cm. The tube was stoppered and heated for 30 min in a water bath at a temperature of 80−90 °C. the Volume was adjusted with water to 15 cm, add 0.3 cmmethyl violet, and after 30 min at room temperature and extraction is carried out 10 cmof toluene for 1 min.

The optical density of organic layer is measured on photoelectrocolorimeter or spectrophotometer at a wavelength of 560 nm in cuvettes with the thickness of the light absorbing layer 2 cm relative to the control sample, which is conducted during the analysis with all reagents.

The contents of thallium found by calibration graph, constructed from the dosed quantities of a standard solution of thallium (I), treated as in the analysis sample, excluding the operation of the filter.

B. 5 Processing of results

Mass fraction of thallium in air , mg/m, calculated by the formula

, (B. 1)

where is the mass of matter found in the entire volume of the test solution, µg;

the volume of the test air, reduced to normal conditions (temperature 20 °C, barometric pressure 760 mm Hg.St., relative humidity 50%), DM.

The final result of the analysis be the arithmetic mean of two parallel definitions.