本文件提供了低蛋白质含量[低蛋白天然橡胶（LPNR）胶乳]的天然胶乳浓缩物的规范，如下所示: —？LPNR胶乳:用脱蛋白剂预处理的现场胶乳或浓缩胶乳，仅用氨水浓缩后离心并保存，碱度至少为0.6？%根据乳胶计算。 本文件适用于医用橡胶产品，避免过敏的可能性。 本文件涵盖LPNR乳胶的要求，类型HA（高氨）和LPNR乳胶，类型LA（低氨）。

This document provides specifications for natural rubber latex concentrate which has low protein content [low protein natural rubber (LPNR) latex], as follows: —？LPNR latex: field latex or concentrated latex pretreated with deproteinising agent, centrifuged and preserved after concentration with ammonia only, with an alkalinity of at least a mass fraction of 0,6？% calculated with respect to the latex. This document is applicable to medical rubber products and avoids the possibility of allergies. This document covers requirements for LPNR latex, type？HA (high ammonia), and LPNR latex, type？LA (low ammonia).