HOME   Cart(0)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

WS/T 107.2-2016 English PDF

US$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
WS/T 107.2-2016: Determination Part 2: inductively coupled of iodine in urine-plasma mass spectrometry method
Status: Valid
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
WS/T 107.2-2016English139 Add to Cart 3 days [Need to translate] Determination Part 2: inductively coupled of iodine in urine-plasma mass spectrometry method Valid WS/T 107.2-2016

PDF similar to WS/T 107.2-2016


Standard similar to WS/T 107.2-2016

GBZ 57   GB/T 31989   WS/T 90   WS/T 87   WS/T 107.1   

Basic data

Standard ID WS/T 107.2-2016 (WS/T107.2-2016)
Description (Translated English) Determination Part 2: inductively coupled of iodine in urine-plasma mass spectrometry method
Sector / Industry Health Industry Standard (Recommended)
Classification of Chinese Standard C61
Classification of International Standard 11.02
Word Count Estimation 6,675
Date of Issue 2016-04-28
Date of Implementation 2016-10-31
Regulation (derived from) National Guard (2016) on the 3rd
Issuing agency(ies) National Health and Family Planning Commission of the People's Republic of China

WS/T 107.2-2016: Determination Part 2: inductively coupled of iodine in urine-plasma mass spectrometry 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.
Determination Part 2. inductively coupled of iodine in urine-plasma mass spectrometry method ICS 11.2.020C61 People's Republic of China Health Industry Standard WS/T 107.2-2016 Determination of iodine in urine Part 2. Inductively coupled plasma mass spectrometry Published.2016-04-28 2016-10-10-31 implementation Published by the National Health and Family Planning Commission of the People's Republic of China

Foreword

WS/T 107 "Determination of Iodine in Urine" to be released in sections , Divided into the following two parts. --- Part 1. arsenic-cerium catalytic spectrophotometry; --- Part 2. Inductively coupled plasma mass spectrometry. This part is the second part of WS/T 107. This section is drafted in accordance with the rules given in GB/T 1.1-2009. This section was drafted. Beijing Centers for Disease Control and Prevention, Fujian Province Center for Disease Control and Prevention, Shandong Province Center for Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Peking University School of Medicine, Beijing Shijingshan District Center for Disease Control and Prevention. The main drafters of this section. Liu Liping, Wang Xiaoyan, Wu Kexin, Lu Qiuyan, Jiao Yanni, Yuan Yuan, Zhang Huimin, Yan Lailai, Xue Lijie. WS/T 107.2-2016 Determination of iodine in urine Part 2. Inductively coupled plasma mass spectrometry

1 Scope

This part of WS/T 107 specifies the method for the determination of iodine in urine by inductively coupled plasma mass spectrometry. This section applies to the determination of total iodine concentration in urine.

2 Principle

After the sample solution is treated with tetramethylammonium hydroxide, the carrier gas (argon) is sent into the inductively coupled plasma torch flame by atomization, and the sample solution The processes of ionization, dissociation, atomization, ionization, etc. are mostly converted into positively charged positive ions, which enter the mass spectrometer through the ion collection system. It is separated according to its mass-to-charge ratio and detected by the detector. The ion counting rate is directly proportional to the content of the analyte in the sample. Eliminate matrix effects and achieve quantitative analysis of iodine content in samples.

3 Instrument

3.1 Inductively coupled plasma mass spectrometer. 3.2 Electronic balance (sensitivity 0.1mg).

4 reagents

4.1 Pure water (H2O, Mr = 18.0), resistivity greater than 18.0 MΩ · cm or deionized water (in accordance with GB/T 6682 level 1 water regulations). 4.2 Tetramethylammonium hydroxide [(CH3) 4NOH, 25% by mass], electronic grade. 4.3 Triton X-100 (C34H62O11, Mr = 647.0), reagent grade. 4.4 Potassium iodate (KIO3, Mr = 214.0), reference reagent or standard reagent.

5 solution preparation

5.1 Tetramethylammonium hydroxide solution (0.25% by mass) Take 1mL of tetramethylammonium hydroxide (4.2) and dilute it to 100mL with pure water (4.1). 5.2 Triton X-100 (1% mass fraction) Take 1mL of Triton X-100 (4.3) solution and dilute it to 100mL with pure water (4.1). 5.3 Thinner (mixed solution of 0.25% tetramethylammonium hydroxide and 0.02% Triton X-100) Before use, take 10mL of tetramethylammonium hydroxide (4.2) and 20mL of Triton X-100 (5.2), and dilute with pure water (4.1) to 1000mL. WS/T 107.2-2016 5.4 Iodine standard solution 5.4.1 Iodine standard stock solution [ρ (I) = 1000. 0mg/L]. Weigh accurately 0.1686g of potassium iodate dried at 105 ° C to 110 ° C to a constant weight, dissolve with pure water, and use Make up the volume of pure water to a 100mL brown volumetric flask. This solution can be stored in a refrigerator (4 ° C) for 8 months. 5.4.2 Iodine standard intermediate solution [ρ (I) = 10.0mg/L]. accurately remove 1,000mL of iodine standard stock solution (5.4.1) and place it in a 100mL volumetric flask, using 0.25 % Tetramethylammonium hydroxide solution (5.1) to volume. This solution can be stored in a refrigerator (4 ° C) for 6 months. 5.4.3 Iodine standard solution [ρ (I) = 1.0mg/L]. Accurately remove 10.000mL of iodine standard intermediate solution (5.4.2) and place it in a 100mL volumetric flask, using 0.25% Make up to volume with tetramethylammonium hydroxide solution (5.1). This solution can be stored in a refrigerator (4 ° C) for 3 months. Accurately transfer 0.001mL, 1.000mL, 5.000mL, 10.000mL iodine standard solution (5.4.3) and 1.50mL, 3.000mL, 6.000mL The iodine standard intermediate solution (5.4.2) was placed in a 100mL volumetric flask, and the volume was adjusted to the mark with 0.25% tetramethylammonium hydroxide (5.1). The quasi-series concentrations were 0.0 μg/L, 10.0 μg/L, 50.0 μg/L, 10.0 μg/L, 150.0 μg/L, 30.0 μg/L, and 600.0 μg/L. 5.6 Background urine A clear urine sample with an iodine content below 70 μg/L. 5.7 Instrument tuning fluid According to the requirements of the instrument operating instructions, take an appropriate amount of instrument tuning solution. It is recommended to use a mixed tuning solution lithium (Li), yttrium (Yttrium), cerium (Ce), thallium (Ti), and cobalt (Co) at a concentration of 10 μg/L. 5.8 Internal standard solution The concentration of the standard substance of tellurium single element solution is 100 μg/mL. Before use, dilute with tetramethylammonium hydroxide solution (5.1) to the corresponding concentration according to the sensitivity of the instrument. Note. If the sample injection volume and internal standard injection volume are 20. 1, the concentration of tellurium in the internal standard is recommended to be 3.0 mg/L; if the sample injection volume and internal standard injection volume are At 1. 1, the concentration of tellurium in the internal standard is recommended to be.200 μg/L. 6 Collection, transportation and storage of urine samples Collect no less than 5mL of urine and place it in a polyethylene plastic or glass test tube with a tightly sealed mouth to prevent evaporation. Urine samples are collected and shipped on site There is no need to consider special storage conditions during the transfer process, it can be stored for 2 weeks at room temperature; the sample can be stored for 2 months at 4 ° C; polyethylene plastic Store the sample, and it can be stored for 4 months at -20 ° C after being sealed.

7 Analysis steps

7.1 Main reference conditions of the instrument. radio frequency (RF) power is 1320W; carrier gas flow rate is 1.10L/min; sampling depth is 7mm; atomization The room temperature is 2 ° C; the sampling cone and interception cone are nickel cones; the atomizer is a high-salt or concentric atomizer. 7.2 Take 1.0mL urine samples separately (mix urine before sampling to suspend all precipitates), add 1.0mL pure water (4.1) and 8.0mL Diluent (5.3), mix well. 7.3 Take 1.0mL of iodine standard use series solution (5.5) and iodine standard solution (5.4.3), add 1.0mL of background urine (5.6) and 8.0mL diluent (5.3), mix well, the iodine concentration of this standard working series solution is 0.0μg/L, 1.0μg/L, 5.0μg/L, 10.0μg/L, 15. 0 μg/L, 30.0 μg/L, 60.0 μg/L, 10.0 μg/L. 7.4 Start up, when the vacuum degree of the instrument reaches the requirements, use the tuning fluid (5.7) to adjust the various indicators of the instrument, so that the instrument sensitivity, oxide, double power WS/T 107.2-2016 After the various indicators such as charge and resolution meet the measurement requirements, edit the measurement method, select the measurement element iodine (127I) and the selected internal standard element, and cite Insert the internal standard solution (5.8), and then introduce the reagent blank, standard series, and sample solution into the instrument for measurement. Note. If the iodine content in the sample exceeds the measurement range, dilute the sample with pure water at an appropriate ratio and measure it according to the method.

8 Calculation of analysis results

8.1 Regression equation method. According to the measurement results, draw the calibration curve of the standard addition method, and use the software that comes with the instrument to convert the standard addition method curve. For the standard curve of the external standard method, calculate the regression equation 狔 = 犪 X + 犫. Calculate the mass concentration of iodine content in the measured sample according to the regression equation (Μg/L). 8.2 The calculation of the mass concentration of iodine in urine is shown in formula (1). ρ (I) = 犮 · K (1) In the formula. ρ (I) --- the mass concentration of iodine (I) in urine, the unit is micrograms per liter (μg/L); 犮 --- the measured sample calculated from the standard curve regression equation or checked from the standard curve Mass concentration of iodine in micro Grams per liter (μg/L); K --- dilution ratio of urine sample.

9 Method characteristics

9.1 Detection limit and measurement range The detection limit of this method is 0.4 μg/L, and urine samples with an iodine content of 0 μg/L to 1,000 μg/L can be directly determined. 9.2 Precision The absolute difference between two independent determination results obtained under the same conditions must not exceed 10% of the arithmetic mean. 9.3 accuracy The recovery rate of the method was between 80% and 120%. The relative standard deviation (RSD) was repeatedly measured within 5.0%. 10 Key points of quality assurance and control 10.1 Sampling process, sample transportation, experimental environment, utensils and reagents shall avoid iodine contamination. 10.2 A standard series shall be prepared and determined for each sample determination, and the absolute value of the correlation coefficient of the standard curve regression equation shall be ≥ 0.999. 10.3 It is advisable to use parallel samples, urinary iodine reference materials approved by the state and granted reference material certificates, and spiked recovery for quality control. means. WS/T 107.2-2016

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of WS/T 107.2-2016_English be delivered?

Answer: Upon your order, we will start to translate WS/T 107.2-2016_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 WS/T 107.2-2016_English with my colleagues?

Answer: Yes. The purchased PDF of WS/T 107.2-2016_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 [email protected]. 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.