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JJF 1712-2018 English PDF

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US$369.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1712-2018: Calibration Specification for Thin Layer Chromatography Scanners
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1712-2018	369	Add to Cart	4 days	Calibration Specification for Thin Layer Chromatography Scanners	Valid

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Basic data

Standard ID: JJF 1712-2018 (JJF1712-2018)
Description (Translated English): Calibration Specification for Thin Layer Chromatography Scanners
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A61
Classification of International Standard: 17.020
Word Count Estimation: 16,175
Date of Issue: 2018-06-25
Date of Implementation: 2018-09-25
Quoted Standard: GB/T 9008-2007
Regulation (derived from): State Administration of Markets, Announcement No. 13 of 2018
Issuing agency(ies): State Administration for Market Regulation
Summary: This standard applies to the calibration of thin layer chromatography scanners (hereinafter referred to as instruments).

JJF 1712-2018: Calibration Specification for Thin Layer Chromatography Scanners

---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.
Calibration Specification for Thin Layer Chromatography Scanners National Metrology Technical Specification of the People's Republic TLC scanner calibration specification Published on.2018-06-25 2018-09-25 implementation State Administration of Markets issued TLC scanner calibration specification Focal Point. National Physical and Chemical Metrology Technical Committee Drafted by. China Institute of Metrology Guangzhou Institute of Metrology and Testing Technology This specification entrusts the National Physical and Chemical Measurement Technical Committee to explain The main drafters of this specification. Tao Hong (China Institute of Metrology) Huang Liang (Guangzhou Metrology and Testing Technology Research Institute) Huang Ting (China Institute of Metrology) Participate in the drafters. Zhang Wei (China Institute of Metrology) Zhang Liling (Guangzhou Institute of Metrology and Measurement Technology) He Chaoping (Guangzhou Institute of Metrology and Measurement Technology)

Introduction (II) 1 Scope (1) 2 References (1) 3 terms (1) 3.1 Ratio shift value (Rf) (1) 4 Overview (1) 5 Measurement characteristics (2) 6 Calibration conditions (2) 6.1 Laboratory environmental conditions (2) 6.2 Standard materials and equipment for calibration (2) 7 Calibration items and calibration methods (2) 7.1 Preparation of thin-layer boards (2) 7.2 Linearity error (3) 7.3 Measurement repeatability (3) 8 calibration result expression (4) 9 re-study interval (4) Appendix A Calibration Record Reference Format (5) Appendix B Calibration Certificate (Inside) Reference Format (6) Appendix C Preparation of Calibration Standard Solution (8) Appendix D Example of Linear Error Measurement Uncertainty Evaluation (9)

Introduction

This specification is based on JJF 1001-2011 "General Terms and Definitions of Measurement", JJF 1071-2010 "National Measurement The Rules for the Preparation of Calibration Specifications, JJF 1059.1-2012 "Measurement and Expression of Measurement Uncertainty" is the basis and basis. Refer to GB/T 9008-2007 "Liquid Chromatography Terminology Column Chromatography and Planar Chromatography" for the content. This specification is the first release. TLC scanner calibration specification

1 Scope

This specification applies to the calibration of thin layer chromatography scanners (hereinafter referred to as instruments).

2 reference files

This specification refers to the following documents. GB/T 9008-2007 Liquid chromatography terminology column chromatography and plane chromatography For dated references, only dated versions apply to this specification; undated quotations The latest version (including all amendments) applies to this specification.

3 terms

The terms and definitions defined in GB/T 9008-2007 and below apply to this specification. 3.1 ratio shift value (Rf). Rf value [GB/T 9008, 6.16] In the plane chromatography, the solute migration distance divided by the mobile phase migration distance can be expressed by the following formula. Rf= Ds Dm In the formula. Ds---solute migration distance, mm; Dm---mobile phase migration distance, mm.

4 Overview

Thin layer chromatography is to place the sample solution on a thin layer plate and spread it with a developing agent in the unfolded container to make the sample contain Separation of ingredients. The basic principle of the instrument is. after the sample is spread on the thin layer plate, it forms spots or forms spots after color development. Point, use a certain wavelength of light to illuminate the spot, perform spectral scanning on the spot, and obtain the specific shift value and absorb according to the scan. The maximum absorption wavelength of the curve is qualitative, and the peak area or peak height of the spot is quantified. The instrument is generally composed of a xenon lamp-tungsten lamp combined light source, a monochromator, a thin layer plate and a detector, and can be used for single beam, Dual beam or dual wavelength measurement, reflective mode and transmissive mode, linear scanning and sawtooth scanning. instrument The structure diagram is shown in Figure 1. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1712-2018_English be delivered?

Answer: Upon your order, we will start to translate JJF 1712-2018_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1712-2018_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1712-2018_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.