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YS/T 520.2-2007 English PDF

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US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
YS/T 520.2-2007: Chemical analysis of gallium. Part 2: Determination of lead content. The 4-(2-pyridy lazo)-resorcinol spectrophotometric method
Status: Valid

YS/T 520.2: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 520.2-2007	199	Add to Cart	3 days	Chemical analysis of gallium. Part 2: Determination of lead content. The 4-(2-pyridy lazo)-resorcinol spectrophotometric method	Valid
YS/T 520.2-2006	199	Add to Cart	2 days	Methods for chemical analysis of gallium. The 4-(2-pyridylazo)-resorcinol photometric method for the determination of lead content	Obsolete

Similar standards

GB/T 4698.17 XB/T 619 YS/T 555.11 YS/T 540.2 YS/T 540.3 YS/T 540.1

Basic data

Standard ID: YS/T 520.2-2007 (YS/T520.2-2007)
Description (Translated English): Chemical analysis of gallium. Part 2: Determination of lead content. The 4-(2-pyridy lazo)-resorcinol spectrophotometric method
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.70
Word Count Estimation: 6,645
Date of Issue: 2007-11-14
Date of Implementation: 2008-05-01
Older Standard (superseded by this standard): YS/T 520.2-2006
Regulation (derived from): NDRC Notice No. 77 of 2007
Issuing agency(ies): National Development and Reform Commission
Summary: This standard specifies the gallium Determination of lead content. This standard applies to the determination of lead content of gallium. Measuring range: 0. 0010% to 0. 030%

YS/T 520.2-2007: Chemical analysis of gallium. Part 2: Determination of lead content. The 4-(2-pyridy lazo)-resorcinol spectrophotometric method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Chemical analysis of gallium.Part 2. Determination of lead content.The 4- (2-pyridy lazo) -resorcinol spectrophotometric method ICS 77.120.70 H14 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 520.2-2006 Chemical analysis of gallium Determination of lead content. Part 2 4- (2-pyridyl) - resorcinol spectrophotometry Posted 2007-11-14 2008-05-01 implementation National Development and Reform Commission issued

Foreword

YS/T 520-2007 "Chemical analysis of gallium" Is the YS/T 520-2006 (formerly GB/T 4375-1984) amendments, divided into Part 12. --- Part 1. Determination of copper content of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline spectrophotometry --- Part 2. Determination of lead content of 4- (2-pyridyl) - resorcinol spectrophotometry --- Part 3. Determination of aluminum content Chromazurol S- tetradecyl pyridine bromide spectrophotometric method --- Part 4. Determination of iron content of 4,7-diphenyl-1,10-phenanthroline spectrophotometry --- Part 5. Determination of calcium content nitrous oxide - acetylene flame atomic absorption spectrometry --- Part 6. Determination of tin content salicylfluorone - cetyl trimethyl ammonium bromide, spectrophotometry --- Part 7. Determination of silicon content extraction - molybdenum blue spectrophotometric method --- Part 8. Determination of indium content of ethyl violet spectrophotometry --- Part 9. Determination of germanium content Phenylfluorone - polyethylene glycol octyl phenyl ether extraction spectrophotometric method --- Part 10. Determination of zinc content atomic absorption spectrometry --- Part 11. Determination of mercury content of the cold atomic absorption spectrometry --- Part 12. lead, copper, nickel, aluminum, indium and zinc Determination of chemical spectroscopy This is Part 2. The partial replacement of YS/T 520.2-2006 (formerly GB/T 4375.2-1984). This part is YS/T 520.2-2006 "Determination of Chemical analysis of gallium Part 2 lead content 4- (2-pyridyl azo) - Inter Hydroquinone spectrophotometry "editorial finishing. The non-ferrous metal part by the National Standardization Technical Committee and centralized. This standard by the Aluminum Corporation of China Shandong branch responsible for drafting. Drafters of this section. Yun-Xia Wang, Shi Ching-chang, all red Tao, Xu good text. The non-ferrous metal part by the National Standardization Technical Committee responsible for the interpretation. This part of the standard replaces the previous editions are. --- YS/T 520.2-2006 (formerly GB/T 4375.2-1984). Chemical analysis of gallium Determination of lead content. Part 2 4- (2-pyridyl) - resorcinol spectrophotometry

1 Scope

This section provides gallium determination of lead content. This section applies to the determination of gallium in lead content. Measurement range. 0.0010% to 0.030%.

2 Method summary

With sample dissolved in hydrochloric acid and nitric acid, sodium citrate and acetone cyanohydrin masking interfering elements, ammonium chloride - ammonia buffer solution (pH = 10) Benzene solution was extracted with dithizone lead, with dilute hydrochloric acid lead back-extracted into the water phase. Lead with 4- (2-pyridyl) - resorcinol (PAR) shape Red complex in a spectrophotometer measuring the absorbance at 520nm wavelength.

3 Reagents

3.1 nitric acid, pure class distinctions (ρ1.42g/cm 3). 3.2 hydrochloric acid, pure class distinctions (ρ1.19g/cm 3). Hydrochloride 3.3 (1 + 119). 3.4 sodium citrate solution (200g/L). Weigh 100g sodium citrate, placed in a beaker of 500mL, 400mL of water was added to dissolve it, With 20% sodium hydroxide solution was adjusted to pH = 7 ~ 8, and the solution was transferred to a separatory funnel 1000mL was added three 10mL0.02% dithizone Chloride solution, shaking 1min, standing layered release organic phase, extraction was repeated several times until the organic phase was green. Aqueous phase 10mL chloroform, oscillation 30s, standing layer, the organic phase was discarded, the aqueous phase was extracted repeatedly several times to colorless. The aqueous phase was diluted to 500mL. 3.5 sodium citrate solution (20g/L). sodium citrate (3.4) diluted 10-fold with water. 3.6 ammonium chloride - ammonia buffer solution (pH = 10.5 ~ 11). Weigh 67g of ammonium chloride, placed in 500mL beaker, 300mL of water To dissolve. The following press sodium citrate solution (3.4) purification method for purification. Purified ammonium chloride solution was added 500mL excellent Level of pure ammonia (ρ0.90), diluted with water to 1000mL. Acetone cyanohydrin 3.7 [(CH3) 2C (OH) CN]. 3.8 washing liquid. 5mL sodium citrate solution (3.4), 5mL ammonium chloride - ammonia buffer solution (3.6), 1mL acetone cyanohydrin (3.7) and 89mL of water and mix. 3.9 PAR solution (0.2g/L). Weigh 0.1g4- (2- pyridyl) - resorcinol dissolved in 200mL of ethanol, diluted with water to 500mL, stored in a brown bottle. Benzene 3.10 dithizone solution (0.2g/L). 3.11 lead standard stock solution. Weigh 0.1000g metallic lead [(Pb) ≥99.99%] placed in 300mL beaker, add 30mL nitrate Acid (1 + 2), to be dissolved lead, get rid of nitrogen oxides heating, cooling, transferred to 1000mL volumetric flask with water to volume, and mix. This solution 1mL containing 100μg lead. 3.12 Lead standard solution. Pipette 20.00mL lead standard stock solution (3.11), placed in 200mL volumetric flask, with nitric acid (1 + 49) dilute Diluted to volume, and mix. This solution 1mL containing 10μg lead.

4 Instrument

Spectrophotometer. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of YS/T 520.2-2007_English be delivered?

Answer: Upon your order, we will start to translate YS/T 520.2-2007_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of YS/T 520.2-2007_English with my colleagues?

Answer: Yes. The purchased PDF of YS/T 520.2-2007_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version YS/T 520.2-2007?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version YS/T 520.2-2007 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.