This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation, storage and contract content of palladium chloride. This standard applies to palladium chloride produced by wet process. GB/T 8185-2004 Palladium chloride GB/T8185-2004 standard download decompression password: www.bzxz.net

This standard is a revision of GB/T8185-1987 "Palladium Chloride". Compared with GB/T8185-1987, this standard has the following changes: the original first and second grade products are changed to general chemical pure and analytical pure; six impurity elements and technical requirements that need to be controlled are added; the determination method of palladium content in palladium dioxide is modified; the determination method of impurity elements in palladium chloride is modified. This standard will replace GB/T8185-1987 from the date of implementation. Appendix A of this standard is a normative appendix.
This standard is proposed by the China Nonferrous Metals Industry Association. This standard is under the jurisdiction of the National Technical Committee for Nonferrous Metals Standardization. This standard is drafted by Guiyan Platinum Co., Ltd. The main drafters of this standard are: Zhu Ying, Shi Hong, Xu Guang, Jin Yaqiu, Zheng Enhua. This standard is interpreted by the National Technical Committee for Nonferrous Metals Standardization. The previous versions of the standards replaced by this standard are: GB/T8185-1987.
GB/T 8185—2004
1 Scope
GB/T8185—2004
This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation, storage and contract content of palladium chloride. This standard applies to palladium chloride produced by wet process. 2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions shall apply to this standard. GB/T619 Sampling and acceptance rules
GB/T15072.4 Chemical analysis methods for precious metals and their alloysYS/T362 Emission spectrum analysis of impurity elements in pure palladium3 Requirements
3.1 Product classification
Determination of palladium content in palladium and silver alloys
This product is divided into analytical pure and chemical pure according to the content of palladium chloride and impurity elements. 3.2 Chemical composition
The chemical composition of palladium chloride shall comply with the provisions of Table 1. Table 1 Chemical composition
Palladium chloride content, not less than
Impurity content, not more than
3.3 Appearance
The product is brown powder.
3.4 ​​Dissolution test
The product should be soluble in dilute hydrochloric acid.
4 Test method
Chemical pure
Analytical pure
4.1 Determine the palladium content Pd (%) in palladium chloride (PdCl2) according to the provisions of GB/T15072.4. The palladium chloride content (PdCl2) is calculated by the following formula:
GB/T 8185--2004
Wherein:
w(PdCl2)(%) =
177.32---molar mass of palladium chloride;
106.42——molar mass of palladium;
w(Pd) (%)—palladium content in palladium chloride. 177.32.
w(Pd)(%)
4.2 Determination of impurity element content: Burn palladium chloride in a hydrogen atmosphere to form sponge palladium, and determine the impurity element content according to the provisions of YS/T362.
4.3 Dilute hydrochloric acid dissolution test: Weigh 0.5g palladium chloride sample, add 20mL hydrochloric acid (1+3) to dissolve, observe under infrared lamp, the solution should be clear and transparent.
4.4 Determination of nitrate content shall be carried out according to Appendix A. 5 Inspection rules
5.1 Inspection and acceptance
5.1.1 Palladium chloride shall be inspected by the supplier's technical supervision department to ensure that the product quality meets the requirements of this standard (or order contract), and fill in the quality certificate.
5.1.2 The buyer shall re-inspect the received products according to the provisions of this standard. If the re-inspection results do not meet the requirements of this standard (or order contract), the buyer shall submit the matter to the supplier within three months from the date of receipt of the product, and the supplier and buyer shall negotiate to resolve the issue. If arbitration is required, arbitration sampling shall be carried out jointly by the supplier and buyer.
5.2 Batching
Palladium chloride shall be submitted for acceptance in batches, and each batch shall consist of the same specifications and batch numbers. 5.3 Inspection items
Each batch of products shall be inspected for palladium fluoride content, impurity element content, dilute hydrochloric acid dissolution test, and nitrate content. 5.4 Sampling
Sampling of palladium chloride shall be carried out in accordance with the provisions of GB/T619. 5.5 Determination of inspection resultsbZxz.net
5.5.1 When the chemical composition is unqualified, the batch of products shall be judged to be unqualified. 5.5.2 When the dilute hydrochloric acid dissolution test and nitrate content are unqualified, double the number of samples shall be taken from the batch of products for repeated tests. If all the repeated test results are qualified, the batch of products shall be judged to be qualified; if there are still unqualified samples in the repeated test results, the batch of products shall be judged to be unqualified. 6 Marking, packaging, transportation, storage
6.1 Marking
The qualified products should be marked with:
a) Supplier name;
b) Product name;
c) Batch number;
d) Specification;
e) Net weight;
f) Date of manufacture.
6.2 Packaging, transportation, storage
6.2.1 The products are packed in plastic bottles, which are tightly sealed. The net weight of each bottle (g): 1, 5, 10, 50, 100, 500, 1000. The bottles should be labeled. The outer packaging should be wooden boxes or corrugated cardboard boxes. 6.2.2 The products can be transported by rail, road, water, air, etc. 2
6.2.3 The products should be placed in a dry place to prevent moisture. 6.3 Quality Certificate
Each batch of products shall be accompanied by a quality certificate, indicating: a)
Name, address, telephone number and fax number of the supplier; product name;
Product specification;
Batch number;
Net weight and number of bottles of the product;
Results of various analytical tests and stamps of the technical supervision department; Number of this standard;
Date of manufacture.
Contents of Order Form (or Contract)
The order form (or contract) for materials listed in this standard shall include the following contents: a)
Product name;
b)Product specification;
Weight;
Number of this standard;
Consultation results when adding contents beyond this standard. e)
Intended use
GB/T8185-2004
Palladium chloride is mainly used for the preparation of special catalysts and molecular sieves; the preparation of surfactants for non-conductor material coatings; the production of gas sensing elements, etc.
GB/T8185--2004
A.1 Scope
Appendix A
(Normative Appendix)
Determination of nitrate content
This method specifies the determination method of nitrate content in palladium chloride. This method is applicable to the determination of nitrate content in palladium chloride. A.2 Principle of the method
The sample is dissolved in dilute hydrochloric acid and the pH is adjusted to 7 with sodium hydroxide to precipitate and separate palladium. In sulfuric acid medium, nitrate reacts with sodium blue disulfonate to fade. The nitrate content in the sample is determined by visual colorimetry. A.3 Reagents and materials
Sodium nitrate, analytical grade.
A.3.2 Ammonium chloride, analytical grade.
A.3.3 Sulfuric acid (pl.84g/mL), analytical grade. A.3.4
Hydrochloric acid (1+1).
A.3.5 Hydrochloric acid (1+3).
Sodium hydroxide solution (2.5mol/L).
Sodium indigo disulfonate solution (0.001mol/L). A.3.7
A.3.8 Nitrate standard solution: Weigh 3.43mg sodium nitrate into a 100mL beaker, add 20mL water to dissolve, transfer to a 500mL volumetric flask, dilute to the mark with water, and mix well. This solution contains 0.005mg nitrate in 1mL. A.4 Analysis steps
A.4.1 Test materials
Weigh 1g palladium chloride powder sample, accurate to 0.001g. A.4.2 Blank test
Carry out a blank test along with the sample. Add 1g of ammonium chloride to the blank and dilute to 10 mL. A.4.3 Standard test
Take 10.0mL of nitrate standard solution in a 150mL beaker, add 1g of ammonium chloride, dissolve it, and evaporate it on a low-temperature electric stove until it is almost dry. The following is carried out according to A.4.4.2 and A.4.4.3. A.4.4 Determination
A.4.4.1 Place the sample (A.4.1) in a 100mL beaker, cover it with a watch glass, add 30ml of hydrochloric acid (A.3.5), heat at low temperature until it is completely dissolved, remove it, cool it, rinse the surface blood and the wall of the beaker with water, transfer it to a 50mL volumetric flask, dilute it to the scale with water, and mix it well. A.4.4.2 Transfer 5.0mL (Solution No. 1) and 25.0mI (Solution No. 2) test solution is placed in a 100ml beaker, evaporated on a low-temperature electric stove until nearly dry, add 25ml of water and 2-3 drops of hydrochloric acid (A.3.4), and heat to dissolve. Remove, adjust the pH to 7 with sodium hydroxide solution, so that all palladium is converted into hydrated palladium oxide, filter, wash with water 3-4 times, combine the filtrate and washings, and evaporate to dryness. A4.4.3 The residue is dissolved with 10mL of water, transferred to a 50mL volumetric flask, 1mL of sodium indigo disulfonate, 20mL of water, mix well, add 10mL of sulfuric acid within 10s~15s under shaking, let stand for 10min, dilute with water to the scale, and mix. Determine the content of nitrate in the sample by visual colorimetry.
A.5 Result determination
GB/T8185-2004
If the blue color of solution No. 1 is not lighter than the standard, then NO≤0.05%; if the blue color of solution No. 2 is not lighter than the standard, then NO≤0.01%.
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